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Tytuł:
Interakcje wyładowania elektryczne - minerały
Inieraction sparks - minerals
Autorzy:
Pawlikowski, M.
Bożęcki, P.
Powiązania:
https://bibliotekanauki.pl/articles/343867.pdf
Data publikacji:
2015
Wydawca:
nakł. Maciej Pawlikowski
Tematy:
minerals
artificial sparks
SEM
minerały
iskry
Opis:
Wykonano eksperymenty polegające na bombardowaniu powierzchni kryształów przez wyładowania elektryczne. Kryształy umieszczono na elektrodzie w specjalnej rurce szklanej. Iskry wytwarzano przy pomocy specjalnego generatora. Powierzchnie kryształów w strefie wyładowań badano przy pomocy mikroskopu skaningowego z przystawką do analiz chemicznych (EDS). Stwierdzono powstawanie w bombardowanej powierzchni kryształów mikro kraterów. Uderzenia iskier spowodowały także w niektórych przypadkach powstanie ziarn czystych metali w pobliżu mikro kraterów.
Interaction minerals artificial sparks were examined using pyrite, galena, hematite an pyrrhotite - bornite were examined using specially constructed generator. The surface of crystals was examines using SEM-EDS after strong bombing by artificial spark. The erosion of surface and formation of micro crater was observed. Moreover activity of sparks led to the formation of new secondary product represented sometime by pure metals.
Źródło:
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering; 2015, 20; 1-24
1689-6742
Pojawia się w:
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wstępna propozycja metodyki identyfikacji surowców kluczowych dla polskiej gospodarki
Preliminary proposal of methodology of identification of key minerals for the Polish economy
Autorzy:
Galos, K.
Smakowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/395095.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
surowce krytyczne
surowce kluczowe
gospodarka surowcami mineralnymi
polityka surowcowa
critical minerals
key minerals
minerals management
mineral policy
Opis:
Od 2013 r. Ministerstwo Gospodarki, w porozumieniu z innymi ministerstwami, pracuje nad spójnym dokumentem pt. „Plan działań na rzecz bezpieczeństwa Polski w zakresie surowców nieenergetycznych". Wśród działań tych przewiduje się m.in. opracowanie listy tzw. surowców kluczowych, wzorem rozwiązań stosowanych na poziomie Unii Europejskiej oraz zaproponowanych w niektórych krajach Unii. Artykuł prezentuje różne definicje surowców strategicznych, krytycznych i kluczowych w krajach rozwiniętych gospodarczo. Na tym tle przedstawiona jest wstępna propozycja metodyki identyfikacji surowców kluczowych dla polskiej gospodarki, w zależności od dwóch przesłanek, tj. znaczenia surowca ze względu na jego źródła i podaż krajową oraz znaczenia surowca pod względem wielkości jego zużycia w krajowej gospodarce. Dzięki zaproponowanej metodyce utworzono wstępną listę 19 surowców kluczowych dla polskiej gospodarki, z których 7 jest niemal całkowicie deficytowych, a 10 surowców ma charakter surowców pochodzących głównie ze źródeł krajowych.
Since 2013, Ministry of Economy of the Republic of Poland, in consultation with other ministries, is working on coherent document "Action Plan for Polish security in relation to non-energy raw materials". Among its activities, preparation of the list of the key mineral raw materials for the domestic economy is planned, according to similar solutions adopted at EU level and proposed in various EU countries. The paper presents various definitions of strategic minerals, critical minerals and key minerals in various developed countries. On this basis, authors present preliminary proposal of methodology of identification of key minerals for Polish economy, depending on two conditions: minerals importance because of their significant domestic sources and supply, and minerals importance because of their significant consumption in domestic economy. Thanks to proposed methodology, preliminary list of 19 key minerals for domestic economy was prepared, including 7 completely deficient minerals and 10 minerals coming mainly from domestic sources.
Źródło:
Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN; 2014, 88; 59-79
2080-0819
Pojawia się w:
Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oxygenic bismuth minerals in the NE part of the Karkonosze pluton (West Sudetes, SW Poland)
Autorzy:
Kozłowski, A.
Matyszczak, W.
Powiązania:
https://bibliotekanauki.pl/articles/139403.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Karkonosze granitoid pluton
bismuth minerals
secondary minerals
oxidation
vein
pegmatite
Karkonosze
pluton
minerały bizmutu
minerały wtórne
utlenianie
żyła
pegmatyt
Opis:
The study presents fifteen oxygen-bearing secondary minerals of bismuth from the north-eastern part of the Variscan Karkonosze granitoid pluton in the northern zone of the Bohemian massif. The minerals were investigated by optical, electron microprobe, classic chemical, XRD, IR absorption and fluid inclusion methods. The late, very low temperature epithermal solutions most probably caused formation of sillénite, kusachiite, bismoclite, bismutite, beyerite, kettnerite, pucherite, schumacherite, namibite and eulytite. Solutions dominated by supergene (meteoric) waters were the parents for bismite, russellite, koechlinite, ximengite and walpurgite. The paper also contains information on early research on the investigated minerals.
Źródło:
Acta Geologica Polonica; 2018, 68, 4; 537-554
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wybrane zagadnienia biomineralogii
Selected issues of biomineralogy
Autorzy:
Pawlikowski, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/20198314.pdf
Data publikacji:
2022
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
tkanka
krystalizacja
rozpuszczenie
równowaga chemiczna
minerały pierwotne
minerały wtórne
minerały obecne w tkankach organizmów
tissue
crystallization
dissolution
chemical balance
primary minerals
secondary minerals
minerals present in tissue of organisms
Opis:
Biomineralogy is the science between mineralogy, biology, medicine and biochemistry. It is focused on problems concerning mineralization of tissue and organs of human, animals and flora. It concerns interaction between mineral and biological tissue, as well as between biochemical components of living organism. These processes are important for good functioning of organs and human life.
Źródło:
Przegląd Geologiczny; 2022, 70, 11; 834-839
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ludwigite-group minerals and szaibelyite: rare borate minerals from Vysoká – Zlatno skarn, Štiavnica stratovolcano, Slovakia
Autorzy:
Bilohuscin, V.
Uher, P.
Powiązania:
https://bibliotekanauki.pl/articles/184418.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
sedimentary rock
evaporitic rock
temperature
Opis:
Beside of sedimentary evaporitic rocks, borate minerals occur also in some high temperature contact-metamorphic rocks, especially in skarns, locally in association with Fe and Sn ore minerals (e.g., Anovitz & Grew 1996). The borate minerals are generally associated with the post-magmatic processes which occur in the contact aureoles of intrusive, acid to intermediary, calc-alkaline rocks (Pertsev 1991). Borate minerals of the ludwigite group and szaibelyite were identified from the Mg-skarn in the R-20 drilling core in depth of 1172 m during geological exploration for Cu- Au porphyry-skarn ores in the Vysoká – Zlatno area near Banská Štiavnica, in the Štiavnica Neogene stratovolcano, central Slovakia (Koděra et a l. 2010). Ludwigite-group minerals (LGM) form massive black aggregates (>5 cm large) of numerous acicular, euhedral to subhedral prismatic crystals (usually 0.2–3 mm long). Ludwigite associates with clinohumite, szaibelyite, clinochlore, serpentine-group mineral, magnesite, dolomite, hematite, rarely valeriite, chalcopyrite, and sphalerite. Under transmitted light, LGM crystals are mostly opaque; locally they are translucent with strong pleochroism in sections parallel to Z-axis (deep green – dark reddish brown). In BSE, LGM crystals show regular concentric, rarely oscillatory or irregular zoning caused by distinct element variations during their growth or partial alteration: the dark zones show enrichment in Mg, Al and Ti, in contrast to the pale zones which reveal larger amounts of Fe. The electron-microprobe analyses reveal growth evolution of LGM crystals from Al- rich azoproite with ≤ 79 mol.% of Mg 2 (Mg 0.5 Ti 0.5 ) (BO 3 )O 2 end-member] to Al ± Ti-rich ludwigite and Al-dominant LGM phase [“aluminoludwigite” with ≤ 53 mol.% of Mg 2 Al(BO 3 )O 2 end-member] in central zones, whereas rim zones of the crystals and secondary veinlets attain nearly pure ludwigite composition [87–99 mol.% of Mg 2 Fe 3+ (BO 3 )O 2 end-member]. Consequently, LGM from the Vysoká – Zlatno skarn show the largest composition al variations ever known from one occurrence and they reach the highest contents of Ti ( ≤ 17.4 wt.% TiO 2 , 0.39 apfu ) and Al ( ≤ 14.4 wt.% Al 2 O 3 , 0.53 apfu ) ever reported in LGM (Schaller & Vlisidis 1961, Marincea 2000, Pertsev et al. 2004, Aleksandrov & Troneva 2008, 2011). The compositional variations indicate the following substitution mechanisms in the studied LGM: Mg 2+ = Fe 2+ for the all compositions, Fe 3+ = Al 3+ for samples without higher amount of Ti, and 2Al = Mg 2+ + Ti 4+ or 2Fe 3+ = Mg 2+ + Ti 4+ for analyses including high Ti content. Szaibelyite MgBO 2 (OH) occurs as aggregates of fibrous crystals, up to 0.5 mm in size, replacing LGM. Zoning in szaibelyite was not observed. The amounts of Mg are uniform (0.98 to 0.99 apfu ), content of Fe 2+ oscillates from 0.2 to 1.2 wt.% FeO (0.002–0.014 apfu ) and indicates the Mg 2+ = Fe 2+ substitution. Szaibelyite also contains small ad mixtures of Mn (0.1–0.4 wt.% MnO), Al and Cr ( ≤ 0.3 wt.% Al 2 O 3 or Cr 2 O 3 ). The skarn mineralization originated as a result of contact thermal metamorphism of Miocene calc-alkaline granodiorite intrusion on host Middle to Upper Triassic limestones, dolomites, shales and evaporitic anhydrite beds (the Veľký Bok Group, Veporicum Unit). The evaporites were most likely the primary source of boron, where as Ti was probably derived from the granodiorite. Clinohumite and LGM (azoproite to Al ± Ti-rich ludwigite and “aluminoludwigite”) precipitated during the high-temperature contact metamorphic event at ~ 700°C and ≤ 100 MPa, whereas the youngest Al,Ti-poor ludwigite veinlets, szaibelyite, serpentine-group mineral, clinochlore, magnesite, dolomite, hematite and probably also sulfide minerals were formed during younger, lower-temperature hydrothermal-metasomatic event.
Źródło:
Geology, Geophysics and Environment; 2016, 42, 1; 59-60
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monazite-bearing post processing wastes and their potential economic significance
Odpady monacytonośne i ich potencjalne znaczenie gospodarcze
Autorzy:
Zglinicki, Karol
Szamałek, Krzysztof
Konopka, Gustaw
Powiązania:
https://bibliotekanauki.pl/articles/216834.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
Bangka Island
mineral tailing
monazite
REE minerals
industrial minerals
processing of minerals
wyspa Bangka
odpady przeróbcze
monacyt
REE
Opis:
During the geological prospecting works conducted in 2013 on Bangka Island (Indonesia), high monazite content was identified in the wastes produced during processing of cassiterite deposits. Monazite, among 250 known minerals containing REE, is one of the most important minerals as primary source of REE. The monazite content in this waste is up to 90.60%. The phase composition of the investigated tailing proves that the sources of minerals accompanying the placer sediments tin mineralization are granitoids. The tailing is composed of numerous ore minerals, including monazite, xenotime, zircon, cassiterite, malayaite, struverite, aeschynite-(Y), ilmenite, rutile, pseudorutile and anatase. Monazite grains belong to the group of cerium monazite. Its grains are characterized by high content of Ce2O3 27.12–33.50 w t.%, La2O3 up to 15.46 w t.%, Nd2O3 up to 12.87%. The total REE2O3 + Y content ranges from 58.18 to 65.90 wt.%. Monazite grains observations (SEM-BSE) revealed the presence of porous zones filled with fine phases of minerals with U and Th content. The radiation intensity of 232Th is ATh = 340 ± 10 Bq and 238AU = 114 ± 2 Bq. High content of monazite and other REE minerals indicates that tailing is a very rich, potential source of REEs, although the presence of radioactive elements at the moment is a technological obstacle in their processing and use. The utilization of monazite bearing waste in the Indonesian Islands can be an important factor for development and economic activation of this region and an example of the good practice of circular economy rules.
W trakcie geologicznych prac prospekcyjnych prowadzonych w 2013 roku na indonezyjskiej wyspie Bangka stwierdzono wysokie zawartości monacytu w odpadach powstałych po przeróbce osadów kasyterytonośnych. Monacyt jest jednym z najważniejszych pierwotnych źródeł REE wśród 250 znanych minerałów zawierających REE. Zawartość monacytu w badanym odpadzie wynosi do 90,60%. Skład fazowy badanych odpadów wskazuje, że źródłem minerałów towarzyszących w cynonośnych złożach okruchowych były granitoidy. W składzie odpadu przeróbczego, metodą XRD zidentyfikowano obecność licznych minerałów złożowych, wśród nich: monacyt, ksenotym, cyrkon, kasyteryt, malayait, strüveryt, aeschynit-(Y), ilmenit, rutyl, pseudorutyl i anataz. Badania składu chemicznego ziaren monacytu z użyciem EPMA ujawniły, że należy on do grupy monacytu cerowego. Jego ziarna cechują się wysoką zawartością Ce2O3 27,12–33,50% wt., La2O3 do 15,46% wt., Nd2O3 do 12,87%. Całkowita zawartość REE2O3 + Y mieści się w zakresie od 58,18 do 65,90% wt. Obserwacje ziaren monacytu (BSE) ujawniły w nich obecność stref porowatych wypełnionych drobnymi fazami minerałów z udziałem U oraz Th. Aktywność promieniotwórcza 232Th wynosi ATh = 340 ± 10 Bq, a 238U = 114 ± 2 Bq. Wysoka zawartość monacytu oraz innych minerałów nośników REE wskazuje, że odpad przeróbczy stanowi bardzo bogate, potencjalne źródło pierwiastków ziem rzadkich, choć zawartość pierwiastków promieniotwórczych stanowi obecnie przeszkodę technologiczną w ich przetwarzaniu i wykorzystaniu. Wykorzystanie monacytonośnych odpadów z wysp Indonezji może być ważnym czynnikiem rozwoju i aktywizacji gospodarczej tego regionu oraz przykładem dobrej praktyki stosowania zasad gospodarki o obiegu zamkniętym.
Źródło:
Gospodarka Surowcami Mineralnymi; 2020, 36, 1; 37-58
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New minerals and the first mineral occurrences in the Kupferschiefer (U, REE, HgS, chloride minerals PtAs2, Pt(Sb,Bi)2, PtBi2), Poland, and their genetic meaning
Autorzy:
Kucha, Henryk “Harry”
Powiązania:
https://bibliotekanauki.pl/articles/2086556.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Mineralogiczne
Tematy:
Polish Cu deposits
phosphate
uranium
new occurrences of minerals
Opis:
Main U minerals in the Lubin and Polkowice mines in decreasing order of abundance are: uraninite, brannerite, metazunerite, metauranospinite, uranospinite, thucholite, monazite-huttonite, coffinite, and becquerelite. All these minerals are associated mainly with noble metal mineralization at the redox interfaces. Main minerals of REE are: (i) brannerite, monazite-huttonite in Noble Metals Bearing Shale (NMBS), (ii) fl orencite in Mo-Re shales and (iii) minor phospates in Cu-black shales derived from oxidation of organic matter. The latter, however, are controlling no more than 1/5 of the REE budget. Chloride minerals and sulphates are ubiquitous phases associated with Cu sulphides. They are represented by chlorargylite, cotunnite and penfeldite. Halite and sylvite form cubic inclusions in gypsum, up to 3 mm in chevrel compound, where they occur together with thiosulphates, annabergite and erithrite and Ni-Co-diarsenides. Sylvite is most common in lensoidal accumulations of semi massive kaolinite + chalcocite + gypsum at the contact between black shale and the top part of white sandstone. Such lenses have been traced over a distance of up to 30 m in the Lubin West and Polkowice East mines. Sylvite and halite have been so far overlooked during investigations of the Kupferschiefer because of applying standard cutting and polishing procedures using water as a lubricant. The Au content in native gold may reach exceptionally up to 97.40 wt% in a dolomitic reef from the Lubin West Mine. Gold forms four characteristic micro to nano-textures. Organic matrix of thucholite indicates correlation of Pt-Ni-V suggesting substitution of Pt in tetrapyrrole ring. Sperrylite, geversite and insizwaite appear at the western perimeter of Cu-sulphide deposit, where the redox gradient is so strong that almost all organic matter is gone. Platinum has forms its own minerals trapped in microfractures in anilite-digenite-spionkopite-yarrowite-bornite composite grains present in the reddened NMBS. Celestine-barite solid solution is one of the main accessory minerals in the Kupferschiefer. It has Sr/Ba ratio around 2.5 and 7.5. Euhedral uraninite associated with celestine-barite yielded U/Pb age of 84 ± 1 Ma, based on four grains measurements.
Źródło:
Mineralogia; 2021, 52, 1; 31--42
1899-8291
1899-8526
Pojawia się w:
Mineralogia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heavy minerals in the key Late Pleistocene loess-palaeosol section at Kolodiiv (East Carpathian Foreland, Ukraine)
Autorzy:
Racinowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/2059497.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Ukraine
Late Pleistocene
loess
palaeosols
heavy minerals
Opis:
Successions of loess and other deposits in the Kolodiiv profile, formed during the Eemian Inter glacial and Vistulian Glacial (OIS 5-2), are characterized using the results of heavy mineral analysis. Weathered local carbonate rocks and fluvial deposits (Wartanian Glacial, OIS 6) are used for comparison. It was found that the content of minerals derived from weathered and redeposited Carpathian Flysch increases from bottom to top of the profile. The entire loess succession accumulated under similar lithodynamic conditions and the palaeosols are of similar character.
Źródło:
Geological Quarterly; 2007, 51, 2; 185-188
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Secondary arsenic minerals from the Złoty Stok As-Au abandoned mine (SW Poland)
Autorzy:
Siuda, R.
Macioch, A.
Powiązania:
https://bibliotekanauki.pl/articles/2060083.pdf
Data publikacji:
2018
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
erythrite-hörnesite-annabergite series
picropharmacolite
secondary arsenic minerals
Opis:
Secondary arsenic minerals (SAM) formed recently in abandoned adits of the former Au-As mine at Złoty Stok (SW Poland) constitute two assemblages. The first consists of two types of scorodite, pitticite, kaňkite, hörnesite, picropharmacolite and minor amounts of jarosite and gypsum. Formation of the Fe arsenates took place under acidic conditions (pH ~3-4) as a result of löllingite, arsenopyrite and pyrite oxidation. Hörnesite and picropharmacolite crystallized as products of interactions between acidic arsenic-rich pore solutions with Mg-Ca carbonates from rocks that surround the ore mineralisation. The interaction of carbonates with acid pore solutions caused a rapid increase in pH that reached neutral or weakly alkaline values. The chemical compositions of hörnesite and picropharmacolite correspond well to their ideal compositions: (Mg3.17Ca0.07)Ʃ3.24(AsO4)1.90 8H2O and Ca4.31Mg0.92(HasO4)1.91[(AsO4)1.99(SO4)0.01]Ʃ2.00 11H2O, respectively. The second assemblage of SAM comprises exclusively the Mg-enriched erythrite [(Co1.66Mg1.03Ni0.28Ca0.05Zn0.02)Σ3.03(AsO4)1.99× 8H2O)] – annabergite [(Ni1.48Mg0.94Co0.66Ca0.12Fe0.01Zn0.01)S3.20AsO4)1.92× 8H2O] series. These minerals crystallized from slightly acidic (pH ~5–6) to neutral media. Dissolution of SAM and other secondary phases (e.g., schwertmannite) causes the release of arsenate and sulphate ions into mine waters. These ions can be reduced under anaerobic conditions by different strains of bacteria. The product of this proces is orpiment.
Źródło:
Geological Quarterly; 2018, 62, 4; 925--940
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
„Minerals 4EU – Europejska sieć informacyjna zaopatrzenia w surowce mineralne” – jeden z wiodących projektów komisji europejskiej ostatnich lat
“Minerals 4EU – European Sustainable Minerals Intelligence Network” – one of European Commission’s leading projects of recent years
Autorzy:
Radwanek-Bąk, B.
Powiązania:
https://bibliotekanauki.pl/articles/2075513.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
minerały 4EU
surowce mineralne
złoża kopalin
prawo geologiczne
prawo górnicze
Minerals 4EU
mineral raw materials
mineral deposits
geological law
mining law
Opis:
In2013–2015, the PGI-NRI participated in the implementation of one of the leading projects of EU raw materials in recent years, Minerals4EU – European Information Network on mineral raw materials. Its goal was to create the first European-scale complex and a public information network of mineral raw materials that would work in a continuous system after the completion of the project. The scope of information gathered in the network and updated on a regular basis includes data on: production, trade, demand and market conditions in the field of primary and secondary minerals. The project partners were the teams representing geological surveys of 27 European countries and several specialized research institutes. PGI-NRI actively participated in two of the six workpackages of task forces, also helping the other ones. Apart from presenting the project tasks and the effects of its implementation the publication presents in a synthetic way the results of research on the condition of availability of mineral deposits in the European Union countries, carried out by the author in the preparation of foresight on raw materials for Europe. During the study, the main causes of restrictions in accessibility of mineral deposits were identified and their trends were rated and described, pointing out to the necessary actions and measures, using the examples of good practice in this area. The studies are important, cognitive and applicable
Źródło:
Przegląd Geologiczny; 2016, 64, 7; 458--463
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nowa metodyka wyznaczania surowców kluczowych, strategicznych i krytycznych dla polskiej gospodarki
New methodology for designation of key, strategic and critical minerals for the Polish economy
Autorzy:
Galos, Krzysztof
Lewicka, Ewa
Burkowicz, Anna
Guzik, Katarzyna
Kamyk, Jarosław
Kot-Niewiadomska, Alicja
Szlugaj, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/2076123.pdf
Data publikacji:
2021
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
surowce kluczowe
surowce strategiczne
minerały krytyczne
bezpieczeństwo surowcowe
polityka surowcowa
key minerals
strategic minerals
critical minerals
mineral security
mineral policy
Opis:
The paper presents a proposal for methodology of designation of the key, strategic and critical minerals, important for the mineral security of Poland. The authors proposed a comprehensive methodology for analysis of 148 individual minerals. When determining the key minerals, a criterion of average value of their annual consumption in Poland in the last decade (2009-2018) was adopted. This approach also regards to the general tendency of consumption of a given mineral and the net import reliance index. To determine strategic minerals, a two-stage analysis was performed, i.e. the identification of potentially strategic minerals that are indispensable for the sectors defined as crucial for the country’s economic security (based on an expert assessment), and – from among them – establishment of the list of strategic minerals on the basis of criteria of the average consumption value in recent years and the net imports reliance. For the identification of critical minerals, the methodology developed for the European Union with some significant modifications was adopted: all the minerals previously classified as key and/or strategic were granted the status of high economic importance in Poland, with disregarding of EU’s evaluation of the value of economic importance (EI) indicator. The second EU index – the supply risk index (SR) – for the determination of the critical minerals for Poland – was slightly reduced from 1.0 to 0.9. Based on the analysis conducted, three lists comprising 42 key, 24 strategic and 17 critical minerals indispensable for the Polish economy development were proposed. Identification of these minerals is of fundamental importance for further works on the Mineral Policy of Poland.
Źródło:
Przegląd Geologiczny; 2021, 69, 10; 654--665
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polymeric flocculants based on the interfacial characteristics of fine clay minerals : a review
Autorzy:
Zhang, Lianfeng
Min, Fanfei
Wang, Lujun
Shu, Qingdong
Powiązania:
https://bibliotekanauki.pl/articles/2146906.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
clay minerals
interfacial characteristic
polymer, flocculation.
Opis:
Fine clay minerals, found in various industrial effluents, have attracted much attention in recent times. They can form a highly stable suspension in water and increase the complexity of sedimentation for the treatment of wastewater. In the past few decades, the flocculation of fine clay minerals has been significantly improved due to numerous design advancements in the molecular weight, charge density and structure of polymeric flocculants. In this article, the interfacial characteristics and affecting factors of clay minerals are discussed, the design, synthesis and application of synthetic polymers, natural polymers and natural-based grafted polymers are reviewed, as well as the advantages and disadvantages of three types of polymers. The development direction of upgrading existing clay mineral flocculants is proposed based on the interfacial characteristics of clay minerals. Weakening the hydration of clay minerals, altering the manner of molecular interaction and precisely controlling the structure of polymer chains are the design objectives of novel polymeric flocculants.
Źródło:
Physicochemical Problems of Mineral Processing; 2022, 58, 4; art. no. 149652
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dietary intake of minerals in diets of adults preparing for marathon
Autorzy:
Salomon, Agnieszka
Mandecka, Anna
Różańska, Dorota
Konikowska, Klaudia
Kosendiak, Aureliusz
Regulska-Ilow, Bożena
Powiązania:
https://bibliotekanauki.pl/articles/1055021.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
macronutrients
marathon
micronutrients
minerals
Opis:
The aim of the study was to evaluate the mineral content in the diets of amateurs preparing for a marathon. The examined group consisted of 92 women (W), whose average age was 30.8 ±6.7 years and 66 men (M), whose average age was 33.2 ±6.6 years. The evaluation of the mineral content of the diets of the surveyed people was done using three-day dietary records which included one day of the weekend. The average daily sodium content in the diets of women was 1,952.2 ±729.2 mg, and in the diets of men it was 3,093.1 ±1,063.3 mg whereas potassium content was 3,361.6 ±798.5 mg and 3,900.3 ±982.3 mg respectively. The potassium content of less than 90% of fulfilling the norm was observed in the diets of 84.8% of women and 66.7% of men. The average content of calcium in the diets of women and men amounted to 887.5 ±278.8 mg and 1,162.6 ± 434.3 mg/day respectively. The diets of 30.4% of women and 16.7% of men had insufficient calcium content as compared to the norms. The average daily phosphorus and magnesium content was significantly higher in men than in women (1,374.6 ±348.6 vs 1,823.5 ±473.0 mg and 373.4 ±107.1 vs 423.6 ±108.8 mg). Magnesium intake was insufficient in the diets of 14.1% of women and 28.8% of men. The average daily content of iron, zinc and copper in the group of women was: 12.1 mg, 10.1 mg and 1.4 mg, while in the diets of men respectively 14.8 mg, 13.5 mg and 1.5 mg. The highest percentage of diets not fulfilling the norm was found for calcium and potassium in women, and potassium and magnesium for men.
Źródło:
Central European Journal of Sport Sciences and Medicine; 2017, 18, 2; 23-32
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mineralogy of the Baszkówka chondrite (L5 S1): new data on silicates, opaques and minor minerals
Autorzy:
Borucki, J.
Stępniewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/2059302.pdf
Data publikacji:
2001
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Baszkówka
meteorites
ordinary chondrites
minerals
spinel
picotite
Opis:
The mineral composition of the Baszkówka meteorite comprises: olivine, pyroxenes, plagioclase, Fe,Ni metal, troilite and chromite with minor chlorapatite, whitlockite, magnetite, haematite, spinel, idaite, calcite and native Cu. A rare variety of spinel (picotite), probably the oldest among the minerals of Baszkówka, was identified in the only two chondrules named: panda and chevron. The composition of the olivine (Fa 26.2š1.8 wt.%) and the high degree of chondrite homogenisation, a result of thermal metamorphism, are consistent with earlier results and indicate the L5 group. No distinct shock effects were observed in Baszkówka, classified as S1. Troilite-Fe,Ni and Fe,Ni metal lumps are defined and interpreted as molten planetesimals impact splashes.
Źródło:
Geological Quarterly; 2001, 45, 3; 229-256
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High temperature transformation of iron-bearing minerals in basalt: Mössbauer spectroscopy studies
Autorzy:
Kądziołka-Gaweł, Mariola
Wojtyniak, Marcin
Klimontko, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/2086563.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Mineralogiczne
Tematy:
basalts
high temperature affects
Mössbauer spectroscopy
Fe-bearing minerals
Opis:
The high temperature decomposition of basalt from Lower Silesia (Poland) was followed by Mössbauer spectroscopy investigation. The Fe content of the sample was ~9.0 at.%. The X-ray diffraction analysis shows that augite (37%) and olivine (12%) are major Fe-bearing mineral components. The sample also contains significant amount of anorthite (22%) and nepheline (17%). The sample was heated at various temperatures between 200o C and 1100o C for three hours. Up to a temperature of 500o C changes in contribution of Fe-bearing minerals are insignificant. Heating in the temperature range from 500o C to 1100o C leads to a systematic increase in contribution of iron oxides at the cost of contribution of silicate minerals, like augite and olivine. Mössbauer spectrum obtained after heating at 1100o C showed hematite as the main iron oxide phase. The ratio of Fe3+/Fetot in the non-heated sample was equal to 0.51 and after heating at 1100o C this ratio amounted to 0.89.
Źródło:
Mineralogia; 2022, 53, 1; 10--19
1899-8291
1899-8526
Pojawia się w:
Mineralogia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ammonium minerals from burning coal-dumps of the Upper Sileian Coal Basin (Poland)
Autorzy:
Parafiniuk, J.
Kruszewski, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/2059219.pdf
Data publikacji:
2009
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Upper Silesian Coal Basin
burning coal-dumps
salammoniac
tschermigite
ammonium minerals
godovikovite
Opis:
Assemblages composed of 11 ammonium min er als, mainly sulphates and chlorides, were recorded from four burning coal-dumps (BCD) in the Upper Silesian Coal Ba sin. Most of them are newly recorded from Poland. Minerals were identified using PXRD and SEM with EDS analyses. Salammoniac, NH4Cl, and tschermigite, (NH4)Al(SO4)2ź12H2O are the most common species on the BCD studied. Kremersite, (NH4,K)2[FeCl5(H2O)], is rare and coexists with members of the ammonioalunite–ammoniojarosite series. Boussingaultite, (NH4)2Mg(SO4)2ź6H2O, and more rarely clairite, (NH4)2Fe3(SO4)4(OH)3ź3H2O, and mascagnite, (NH4)2SO4, ac company numerous Mg, Al, Fe and Ca sulphate minerals. These usually occuras very fine admixtures forming coatings, small nodules or porous masses and were found on the BCD surface close to gas vents. Also a massive sulphate crust was found in the deeper part of the BCD nearby the fire zone. This crust is composed mainly of an hydrous sulphates: godovikovite, (NH4)(Al,Fe)(SO4)2 , and very minor sabieite, (NH4)Fe(SO4)2, and efremovite, (NH4)2Mg2(SO4)3, which were transformed into different hydrated sulphates in the outer zone of the crust. The fibrous or dendritic habit of many ammonium minerals, and the vesicular texture of some sulphate aggregates, point to their crystallization from the gas phase. Some ammonia miner ls may also have developed through hydration of prevlously formed phases or precipitated from locally formed aqueous solutions due to cooling or evaporation. The appear ance of ammonia minerals on BCD can be a useful indicator of the presence of underground fires.
Źródło:
Geological Quarterly; 2009, 53, 3; 341-356
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption behaviour of As(III) onto synthetic iron-based minerals: a comparative study of akaganeite, goethite and magnetite
Autorzy:
Ulatowska, Justyna.
Powiązania:
https://bibliotekanauki.pl/articles/2146953.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
iron-based minerals
arsenic
adsorption
FTIR analysis
kinetic study
Opis:
The present study compares the adsorption capacity of iron-based minerals in removing As(III) from aqueous solutions. The work contains the results of studies carried out on a laboratory scale. The synthetic material was used in three forms as akaganeite, goethite and magnetite. To characterise the minerals before and after adsorption of As(III), specific surface area, particle size distribution, density, and zeta potential were determined. Additionally, digital and optical micrographs, SEM, and FTIR analyses were performed. In the experimental part, the influence of the main parameters on the adsorption efficiency was investigated (pH, initial concentration, contact time, and amount of adsorbent). Adsorption isotherms were fitted by Freundlich, Langmuir, and DubininRadushkevich models. Pseudo-first-order (PFO), pseudo-second-order (PSO), and intraparticle diffusion (IPD) models were used to fit the kinetics data. Linear regression was used to estimate the parameters of isotherm and kinetic models. FTIR measurements gave helpful information on the synthesised minerals and the As(III) removal process. Results show that As(III) adsorption is related to the iron-based adsorbents, and adsorption efficiency increases in the following order: goethite < magnetite < akaganeite.
Źródło:
Physicochemical Problems of Mineral Processing; 2022, 58, 2; art. no. 144818
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Plumbogummite group minerals in Lower Devonian placoderm sandstones from Podłazie Hill, Holy Cross Mountains, Poland
Autorzy:
Kruszewski, Ł.
Dec, M.
Powiązania:
https://bibliotekanauki.pl/articles/2059777.pdf
Data publikacji:
2018
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
plumbogummite group minerals
REE enrichment
gorceixite
goyazite
crandallite
bone replacement
Opis:
Samples of Lower Devonian vertebrate-bearing placoderm sandstones collected in a quarry at Podłazie Hill in the Holy Cross Mountains, central Poland, were found to contain numerous white and brownish aggregates of an unknown composition. Powder X-Ray Diffraction study has shown them to comprise plumbogummite group minerals (PGM). Gorceixite is most common, usually forming compact/porous aggregates. They are either found in voids within the quartz-rich zircon-, muscovite- and biotite-bearing matrix, or as a complete replacement after bone remnants. Goyazite aggregates are similar but rarer. Strontian crandallite is found as tiny zoned crystals closely associated with compact gorceixite (in the sandstone matrix) or as cores of fine-grained gorceixite aggregates (within the bones). All of the PGMs are enriched in Ce and La with two analyses marginally within the compositional field of florencite-(Ce). Ca enrichment, elevated F content and abundance of goyazite within the bone replacement suggest the primary bone apatite group as the source of these elements. Tuffites and claystones associated with the sandstones are probably the source of Ba and Sr, while Pb is possibly derived from local Devonian mineralisation.
Źródło:
Geological Quarterly; 2018, 62, 2; 353--360
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Clay minerals in cave sediments and terra rossa soils in the Montagnola Senese karst massif (Italy)
Autorzy:
Iacoviello, F.
Martini, I.
Powiązania:
https://bibliotekanauki.pl/articles/2060561.pdf
Data publikacji:
2013
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
cave sediments
terra rossa
clay minerals
red mud
Montagnola Senese
Opis:
Reddish mud-rich sediments are common in several karst areas, in the form of red surface soils and clastic cave infilling. The origin and significance of red surface soils have been largely debated over the last years, whilst clastic mud-rich sediments in cave environments have received less attention by geoscientists. The genetic relation between these two materials still remains uncertain. In fact, these sediments are mainly constituted by fine materials, therefore, their study has been generally focused on the clay fraction only.This paper compares the clay fraction of red surface soils and mud-rich cave sediments in the Montagnola Senese massif. Previous studies have demonstrated that in this area red cave muds originate from the erosion of the red surface soils and their consequent re-deposition in the cave environment. Despite these well-established genetic relations, notable differences in the clay fraction of these two materials have been recognized in the present study. These differences are likely to be attributable to the different grades of pedogenetic alteration that affected the two materials. This study demonstrates that the genetic relations between mud-rich cave sediments and red surface soils can be misinterpreted when the clay mineral fraction only is considered.
Źródło:
Geological Quarterly; 2013, 57, 3; 527--536
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New data on heavy minerals from the Upper Cretaceous-Paleogene flysch of the Beskid Śląski Mts. (Polish Carpathians)
Autorzy:
Grzebyk, J.
Leszczyński, S.
Powiązania:
https://bibliotekanauki.pl/articles/2058926.pdf
Data publikacji:
2006
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Polska
Carpathians
Paleogene
Upper Cretaceous
heavy minerals
provenance
Opis:
The types, abundance and origin of non-opaque heavy minerals from17 samples of sandstones and granule conglomerates of the Godula Beds, Upper Istebna Sandstone, Ciężkowice and Cergowa Sandstone (Upper Cretaceous–Paleogene) of the Beskid Śląski Mts. are described in this study. The descriptions are based on standard optical petrographic investigations and on scanning electronmicroscope (including electron microprobe) analysis. Garnet, rutile, zircon and tourmaline are the most common types of heavyminerals. Monazite and apatite occur subordinately, whereas epidote and spinel are sporadic. The heavy minerals from the Middle and Upper Godula Beds and the Upper Istebna Sandstone indicate original derivation mainly from metamorphic rocks of granulite and partly eclogite facies. Metasediments were significant constituents, with subordinate granitoids and hornfelses. Granitoids and corresponding pegmatites and aplites, as well as metapelites and metapsammites, appear to be the primary crystalline parent rocks of the Lower Godula Beds and the Ciężkowice Sandstone. Garnet-mica schists with subordinate granitoids and their pegmatites are interpreted as the main crystalline parent rocks of the Cergowa Sandstone. Sporadic chromian spinels and chromian pyrope indicate derivation from mafic and ultramafic rocks. Co-occurrence of rounded and fresh unabraded grains (sometimes euhedral) suggests a mixed provenance for the clastic material, both from crystalline and older sedimentary rocks.
Źródło:
Geological Quarterly; 2006, 50, 2; 265-280
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrothermal metasomatism of a peralkaline granite pegmatite, Khaldzan Buragtag massif, Mongolian Altai; complex evolution of REE-Nb minerals
Autorzy:
Bagiński, B.
Jokubauskas, P.
Domańska-Siuda, J.
Kartashov, P.
Macdonald, R.
Powiązania:
https://bibliotekanauki.pl/articles/139319.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Khaldzan-Buragtag Nb-REE-Zr deposit
hydrothermal alteration
composition of fluids
Chevkinite group minerals
REE minerals
złoże
przeobrażenia hydrotermalne
skład płynów
minerały
Opis:
The low-temperature hydrothermal alteration of certain rare-metal minerals is recorded in a quartz-epidote metasomatite from the Tsakhirin Khuduk occurrence in the Khaldzan-Buragtag Nb-REE-Zr deposit, Mongolian Altai. A peralkaline granitic pegmatite was metasomatized by hydrothermal fluids released from associated intrusions, with the formation of, inter alia, chevkinite-(Ce), fergusonite-(Nd) and minerals of the epidote group. The textural pattern indicates recrystallization and coarsening of these phases. Later, low-temperature alteration byfluids resulted in the chevkinite-(Ce) being replaced by complex titanite-TiO2-cerite-(Ce)-hingganite-hydroxylbastnäsite-(Ce) assemblages. Calcite formed late-stage veins and patches. The hydrous fluids were poor in F and CO2 but had high Ca contents.
Źródło:
Acta Geologica Polonica; 2016, 66, 3; 473-491
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przeróbka kopalin towarzyszących w kopalni węgla brunatnego Bełchatów
Accompanying minerals processing in Bełchatów brown coal mine
Autorzy:
Daniluk, H.
Witek, R.
Powiązania:
https://bibliotekanauki.pl/articles/170157.pdf
Data publikacji:
2012
Wydawca:
Poltegor-Instytut Instytut Górnictwa Odkrywkowego
Tematy:
węgiel brunatny
kopaliny towarzyszące
przeróbka
brown coal
accompanying minerals
processing
Opis:
W Kopalni Węgla Brunatnego Bełchatów, w trakcie eksploatacji złoża węgla brunatnego, pozyskiwane są selektywnie duże ilości kopalin towarzyszących. Kopaliny transportowane są na składowiska złoża wtórne i zagospodarowywane w stanie surowym łub przerabiane. Kopalnia posiada dwa Zakłady Przeróbki Kruszyw zlokalizowane w sąsiedztwie składowisk kopalin. Linie technologiczne zakładów umożliwiają przeróbkę kopalin i uzyskanie szerokiego asortymentu kruszyw które znajdują zastosowanie m.in. w budownictwie.
In Bełchatów Brown Coal Mine large number accompanying minerals are extracted during brown coal exploration. Minerals are transported to the places of their storage - secondary deposits - and then processed or delivered directly for processing. The brown coal mine has two processing plants located nearby its deposits. Production lines of plants enable processing of accompanying minerals and obtaining wide range of aggregates used in building industry among others.
Źródło:
Górnictwo Odkrywkowe; 2012, 53, 1-2; 76-82
0043-2075
Pojawia się w:
Górnictwo Odkrywkowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biogenic catalysis in sulphide minerals weathering processes and acid mine drainage genesis
Autorzy:
Kušnierová, Mária
Praščáková, Mária
Nowak, Anna
Gorazda, Katarzyna
Wzorek, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/1039326.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
sulphide minerals
weathering
acid mine drainage
biotransformation
Acidithiobacillus ferrooxidans
Opis:
Bioleaching and biogenesis are the main outputs from a large group of environmental processes participating in the natural material cycle, used in raw materials processing. Bio-oxidation reactions are the main basis for bioleaching procedures, often participating in parallel leaching processes. During the leaching processes of polycomponent sulphide substrates, the factor of process selection also plays an important role, being in direct relation to the electric properties and galvanic effect occurring between the individual components of the leaching substrate. This work gives a summary of the results of a research focused on the possibilities of using biotechnological procedures for treatment of Slovak sulphide ores. The object of the research is extraction of valuable metals, undesirable admixtures and degradation of crystal lattice of sulphides for subsequent chemical leaching processing of precious metals. The results of experiments on the existence of biogenic processes in situ on waste dumps from exploitation containing residual sulphides are also presented. The processes result in acid mine drainage water generation. These waters are strongly mineralised (over 48 g/L) and of low pH; that is why they are very caustic. The arsenic content (2.558 mg/L) in outflowing waters from old mines is high and over the limits set by the law.
Źródło:
Acta Biochimica Polonica; 2014, 61, 1; 33-39
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
GIS-based spatial assessment of rock minerals mining - a case study of the Lower Silesia Region (SW Poland)
Autorzy:
Blachowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/89118.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
mining
GIS analysis
rock minerals
regional resource management
Lower Silesia (Poland)
Opis:
Mining of rock minerals, constitutes a strong stimulus for economic development and at the same time, can significantly and negatively affect the state of natural environment, roads and well-being of local communities. This paper presents methodology for studies of spatial impact of rock minerals mining in the Lower Silesia region (SW Poland). In the region majority of magmatic, metamorphic and other rock minerals occur in Poland and their intensive mining is an important sector of regional economy. The concept of mining density (mineral production per unit area) has been introduced and the changes of rock minerals mining in the period of the last 8 years (2006-2013) have been analysed and presented graphically with GIS-based methodology. Mining density increased from 2006 to 2011 and decreased from 2011 to 2013. Change in the spatial pattern of mining density between 2006 and 2013, despite comparable volume of rock minerals production, has been identified. In addition proximity of mines to human settlements, nature protection areas and railways (potential transport routes) has been analysed. Comprehensive and coherent information on rock minerals mining for the area of Lower Silesia provided in this study has been used in developing and implementing regional spatial development policy and attaining the balance between the economic needs, nature protection requirements and the well-being of its citizens.
Źródło:
Mining Science; 2015, 22; 7-22
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kopaliny towarzyszące w złożu węgla brunatnego Legnica
The accompanying minerals in the Legnica lignite deposit
Autorzy:
Ratajczak, T.
Hycnar, E.
Powiązania:
https://bibliotekanauki.pl/articles/395138.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
skały nadkładu
kopaliny towarzyszące
właściwości surowcowe
overburden rocks
accompanying minerals
raw material properties
Opis:
Złoże Legnica należy do jednego z najbardziej perspektywicznych w kontekście przyszłej eksploatacji węgla brunatnego. Jego wydobycie będzie nierozerwalnie związane ze zdejmowaniem skał nadkładu. Kubatura nadkładu w przypadku tego złoża jest wyjątkowo duża, a część tworzących go skał, z uwagi na wykazywane właściwości surowcowe, może być zaliczana do kopalin towarzyszących. Stan rozpoznania surowcowego skał nadkładu w złożu węgla brunatnego Legnica jest niewystarczający. Jak dotąd nie były one obiektem szczegółowych i kompleksowych badań mogących wykazać ich przydatność. W artykule dokonano podsumowania stanu wiedzy na ten temat. Informacje dotyczące właściwości surowcowych tych utworów będą stanowić jedno z zasadniczych kryteriów decydujących o traktowaniu ich jako kopaliny towarzyszące. Do kopalin towarzyszących powinny zostać zaliczone: piaski i żwiry czwartorzędowe oraz gliny zwałowe, a także piaski i iły trzeciorzędowe. Za szczególnie przydatne surowcowo należy uznać iły trzeciorzędowe (poznańskie). Występują one w dwu odmianach kolorystycznych – zielonkawo-niebieskiej i płomienistej. Pierwsze z nich (zielonkawo-niebieskie), ze względu na skład fazowy substancji ilastej, należy zaliczyć do odmian illitowo-kolinitowo-smektytowych, drugie (płomieniste) – do odmian kaolinitowo-illitowo-smektytowych. Stanowią one wartościowy surowiec do produkcji materiałów budowlanych. Z uwagi na charakter asocjacji minerałów ilastych (w szczególności obecność montmorillonitu) stanowią potencjalne sorbenty mineralne. Wykazują również przydatność do budowy przesłon hydroizolacyjnych. Piaski i żwiry czwartorzędowe zalegające w nadkładzie złoże Legnica są zróżnicowane surowcowo. Większość z nich stanowi surowiec przydatny dla przemysłu budowlanego. Gliny zwałowe mogą znaleźć zastosowanie jako składnik mieszanek ceramicznych. Piaski trzeciorzędowe można wykorzystać jako materiał podsadzkowy. Stan rozpoznania surowcowego skał nadkładu w złożu węgla brunatnego Legnica jest niewystarczający. Jak dotąd nie były one obiektem szczegółowych i kompleksowych badań mogących wykazać ich przydatność. Kopaliny towarzyszące zalegające w złożu Legnica, powinny być selektywnie eksploatowane i składowane. Utworzenie złóż antropogenicznych gromadzących te kopaliny, zapewni możliwość ich wykorzystania przez kolejne dziesięciolecia po zakończeniu eksploatacji.
The Legnica deposit is one of the most prospective in the context of future lignite mining. Its extraction will be inseparable from the removal of the rocks of the overburden, the volume of which is very large. Due to the raw material properties, some of the rocks can be classified as accompanying minerals. The raw material identification of overburden sediments in the Legnica lignite deposit is insufficient. So far, they haven’t been the subject of detailed and comprehensive research to prove their usefulness. The article was a summary of the knowledge on this subject. The following should be included in the accompanying minerals: Quaternary sands and gravels, tertiary sands and clays (Poznan clays). They are present in two colour variants in the Legnica deposit - and fiery. The mineral composition of greenish-blue clays allows them to be included in illite-kaolinite- smectite varieties, in turn fiery clays as kaolinite-illite-smectite varieties. The tertiary clays are a very useful raw material for the production of building materials. In addition, they are potential mineral sorbents due to the nature of the association of clay minerals (occurrence of montmorillonite). They also show suitability for building waterproofing barriers. Quaternary gravels and sands, developed in the overburden Legnica deposit are differentiated raw materials. Some of them are raw materials for the construction industry. The glacial tills can be used as a component of ceramic mixtures. Tertiary sands can be used as a proppant material. The information on the raw material properties of these sediments will be one of the essential criteria for their treatment as accompanying minerals. Minerals accompanying those developed in the Legnica deposit should be exploited and deposited selectively. The creation of anthropogenic deposits accumulating these minerals will provide the possibility of their use for decades after the termination of operation.
Źródło:
Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN; 2017, 100; 193-204
2080-0819
Pojawia się w:
Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A review of investigations into the management of gangue in the flotation of platinum group minerals
Autorzy:
O’Connor, C.
Wiese, J.
Corin, K.
McFadzean, B.
Powiązania:
https://bibliotekanauki.pl/articles/110708.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
Depressants
chromite
copper sulphate
platinum group minerals
Opis:
The Bushveld Complex of South Africa contains almost 90% of the world’s reserves of platinum group minerals (PGMs). In the flotation of PGMs, there are significant challenges arising from the need to treat ever-decreasing grades of the relevant ore deposits. The major challenge in the flotation of these ore bodies is the control and management of the gangue minerals, particularly silicates such as orthopyroxene, plagioclase feldspar, and pyroxene which are often rimmed with talc which makes them naturally floatable. It has been shown that various polysaccharide depressants such as CMC and guar have different properties in terms of depressing the gangue minerals. Since the PGMs are often associated with sulphides, copper sulphate is widely used as an activator in PGM flotation but can inadvertently activate the gangue minerals as well as reduce the recovery of PtTe2 which accounts for up to 40% of the Pt in the Platreef ore body. Depressants also reduce the mass of solids reporting to the froth and can thus destabilize the froth. This effect on the froth can be mitigated by using higher frother dosages or water of higher ionic strength. In summary due care needs to be taken to carry out site test work to develop an optimum ratio of collector, frother, activator and depressant to ensure that the highest grades and recoveries of the PGEs are obtained while reducing depressant dosage as much as possible. Chromite recoveries can be reduced through the application of gravity separation or reducing entrainment through reduced water recovery.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 4; 1107-1115
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature and isotopic relations in carbonate minerals in the Middle Jurassic sideritic rocks of central and southern Poland
Autorzy:
Jarmołowicz-Szulc, K.
Kozłowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/2060537.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
fluid inclusions
isotopes
carbonate minerals
sideritic rocks
Middle Jurassic
Opis:
The present study assesses the physico-chemical character of the fluids responsible for the genesis of carbonate minerals in the Middle Jurassic sideritic rocks at the northeastern margin of the Holy Cross Mts. and in the Częstochowa region. These rocks occur at present at depths between 30 and 600 m. Fluid inclusion and isotopic analyses have been performed in the carbonate minerals from sideritic sandstones, clayey siderites and sideritic coquinas. Siderite is the main carbonate mineral of the sideritic rocks. Calcite and ankerite are also present. The siderite is represented by two varieties, Mg-rich siderite (sideroplesite, less commonly – pistomesite) and siderite. Two generations of siderite have been distinguished – an early and a late one. The early siderite was formed at temperatures of about 20°C in the zone of microbiological methanogenesis from marine waters with some influence of meteoric waters (δ18O from –7.84 to –1.92‰ VSMOW). The late siderite crystallized at temperatures of about 62–110°C from pore waters enriched in 18O (δ18O >0‰ VSMOW) as compared with the isotopic composition of the waters responsible for the early siderite generation. The conducted fluid inclusion analyses point to formation of the cements from complex fluids of brine and carbon dioxide character, with densities slightly exceeding 1 g/cm3 and salinities varying from 10.5 to 16.9 wt.% NaCl eq. and from 6.4 to 14.0 wt.% NaCl eq. in the Holy Cross Mts. and in the Częstochowa region, respectively. The homogenization temperatures lie in the intervals of 62–110°C and 60–97°C, respectively and represent elevated values compared with data from the Polish Lowlands. Apart from burial, other heat sources must have been important for the lithogenesis of the Middle Jurassic deposits.
Źródło:
Geological Quarterly; 2016, 60, 4; 881-892
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regionalna gospodarka surowcami skalnymi w województwie dolnośląskim
Regional management of rock minerals in the dolnośląskie voivodeship
Autorzy:
Blachowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/170756.pdf
Data publikacji:
2011
Wydawca:
Poltegor-Instytut Instytut Górnictwa Odkrywkowego
Tematy:
województwo dolnośląskie
zagospodarowanie przestrzenne
górnictwo surowców skalnych
dolnoslaskie voivodeship
spatial development
rock minerals mining
Opis:
W artykule wskazano na podstawowe dokumenty służące realizacji regionalnej polityki przestrzennej w województwie dolnośląskim, którymi są Plan zagospodarowania przestrzennego województwa oraz Strategia Rozwoju Województwa Dolnośląskiego do 2020 roku. Omówiono ustalenia tych dokumentów w zakresie gospodarki i ochrony zasobów surowców skalnych. Szczegółowo scharakteryzowano dokumenty analizujące problemy zagospodarowania przestrzennego w województwie związane z górnictwem surowców skalnych. Są to, Studium wydobycia i transportu surowców skalnych na Dolnym Śląsku z 2009 roku oraz Aneks do Studium przygotowany w 2011 roku, w których zawarto wyniki identyfikacji i analiz zjawiska eksploatacji i transportu surowców skalnych ze złóż koncesjonowanych przez Marszałka Województwa w przestrzeni regionu w okresie od 2006 roku. Podjęto w nich także próby oceny zapotrzebowania i dostępności zasobów tych kopalin i wskazano na potencjał kolei jako podstawowego środka transportu. W artykule zwrócono uwagę na rolę jaką dokumenty te, w połączeniu z uprawnieniami Marszałka jako organu administracji geologicznej, mogą pełnić w wypracowaniu i realizacji regionalnej polityki i strategii racjonalnego wykorzystania surowców skalnych.
In the paper the most important documents of carrying into effect regional spatial development policy in the Dolnoslaskie-Voivodeshipare indicated. These are, the Spatial Development Plan of the Voivodeship and the DolnoslaskieVoivodeship Development Strategy until the year 2020. The documents’ assignations in the sphere of rock minerals management and resources protection are discussed. The documents analyzing the problems of spatial development in the Voivodeship connected with rock minerals mining. These are, the Study of rock minerals mining and transport in the Lower Silesia from the year 2009 and Annex to the Study from the year 2011. Both the documents contain results of identification and analyses of the processes of exploitation and transport of rock minerals from deposits licensed by the Voivodeship Marshall in the region’s space in the period from 2006. An attempt to assess demand and availability of these minerals’ resources has been made and indication of railways as the primary means of transport are made. In the paper attention has been also made to the role of these documents, can serve in developing and carrying out regional policy and strategy of sustainable use of rock minerals in connection with the powers of the Marshall as the regional body of geological administration.
Źródło:
Górnictwo Odkrywkowe; 2011, 52, 6; 15-18
0043-2075
Pojawia się w:
Górnictwo Odkrywkowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Insight into the effect of galvanic interactions between sulfide minerals on the floatability and surface characteristics of pyrite
Autorzy:
Yang, Bo
Tong, Xiong
Xie, Xian
Huang, Lingyun
Powiązania:
https://bibliotekanauki.pl/articles/1448232.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
galvanic interaction
floatability
pyrite
sulfide minerals
Opis:
Complex sulfide ores are usually found as a mixture of various sulfide and gangue minerals, and froth flotation is the predominant method for the selective separation of sulfide minerals. Adherence and contact between sulfide minerals are inevitable during froth flotation, and galvanic interactions between sulfide minerals will occur because of differences in rest potentials. However, the effect of these galvanic interactions on the selective flotation of sulfide minerals have been rarely studied. In this work, the effect of the galvanic interaction between pyrite and sphalerite on the flotation behavior and surface characteristics of pyrite was investigated by micro-flotation tests, collector adsorption tests, electrochemical techniques and XPS (X-ray photoelectron spectroscopy) surface analysis. The micro-flotation tests indicated that the floatability of pyrite decreased in the pH range of 4.0 to 9.5 and increased under strongly alkaline pH conditions (pH > 10) due to the galvanic interaction. The collector adsorption results demonstrated that the adsorption capacity of the collector on the pyrite surface was significantly reduced because of the galvanic interaction between pyrite and sphalerite. The electrochemical measurements revealed that the decrease in the oxidation current of xanthates to dixanthogen was responsible for the decreasing adsorption capacity of the collector on the pyrite surface. The XPS results indicated that the formation of the $S_O_3^{2-}$ oxidation product on the pyrite surface decreased at a strongly alkaline pH due to the galvanic interaction. Therefore, pyrite floatability improved at an alkaline pH. These results consistently showed that the galvanic interaction between pyrite and sphalerite had an important influence on the floatability and surface characteristics of pyrite.
Źródło:
Physicochemical Problems of Mineral Processing; 2021, 57, 2; 24-33
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Innowacyjne rozwiązania eksploatacji kopalin skalnych
Innovative solutions for the exploitation of rock minerals
Autorzy:
Glapa, W.
Stefanicka, M.
Powiązania:
https://bibliotekanauki.pl/articles/164732.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Górnictwa
Tematy:
górnictwo odkrywkowe
kopaliny skalne
innowacyjne eksploatacje złóż
surface mining
rock minerals
innovative exploitation of mineral deposits
Opis:
W artykule przedstawiono ważniejsze dane dotyczące innowacyjnych rozwiązań eksploatacji krajowych kopalin skalnych. Podano struktury zasobów i wielkości wydobycia tych kopalin w latach 2002–2016. Opisano nowoczesne techniki wydobywania i przeróbki kopalin o podstawowym znaczeniu dla budownictwa i drogownictwa. Skoncentrowano się na dwóch grupach surowcowych: kopalin okruchowych (piaskach i żwirach) oraz kamieniach łamanych i blocznych ze szczególnym uwzględnieniem produkcji kruszyw łamanych oraz granitowych elementów blocznych.
The article presents more important data on innovative solutions for exploitation of domestic rock minerals. Resources structure and volume of these minerals output were reported in 2002-2016. Modern techniques of mining and processing of minerals, essential for building and highway engineering, have been described. The focus was on two groups of raw materials: aggregates (sand and gravel) and crushed and dimension stones, with particular focus on the production of crushed aggregates and granite dimension stone elements.
Źródło:
Przegląd Górniczy; 2017, 73, 10; 73-83
0033-216X
Pojawia się w:
Przegląd Górniczy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heavy minerals from Oligocene sandstones of the Menilite Formation of the Skole Nappe, SE Poland : a tool for provenance specification
Autorzy:
Salata, D.
Uchman, A.
Powiązania:
https://bibliotekanauki.pl/articles/2060508.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
heavy minerals
provenance
Lower Oligocene
Menilite Formation
Skole Nappe
Opis:
Heavy minerals from sandstones belonging mostly to the Boryslav Sandstone and Kliva Sandstone members of the lower part of the Menilite Formation (Oligocene) in the northern part of the Skole Nappe, Polish Carpathians are characterized. In the study area, the sediments were deposited in the Rzeszów and Łańcut channel zones running from the northern margin of the basin. The most frequent heavy minerals in the sandstones examined include zircon, tourmaline, rutile, staurolite, kyanite and garnet. Single grains of andalusite, sillimanite, apatite, epidote, brookite and chrome spinel occur in some samples. The very small content of apatite is related to long, continental weathering in the source area, which is referred to the Paleozoic sedimentary cover of the Małopolska Block and the easternmost part of the Upper Silesian Block. Different preservation states, morphology, degree of roundness and colour varieties suggest that the heavy minerals studied derive from various petrographic types including metamorphic, igneous and sedimentary rocks. However, the Carboniferous and Permian conglomerates and sandstones seem to be the most probable source rocks.
Źródło:
Geological Quarterly; 2012, 56, 4; 803--820
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of components and parameters of some sulfide minerals surface tension with regards to stability of mineral-air bubble system
Autorzy:
Jańczuk, Bronisław
Zdziennicka, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1450639.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
contact angle
wettability
surface tension
detachment force
sulfide minerals
Opis:
The measurements of the advancing contact angle of water, glycerol, formamide, ethylene glycol, diiodomethane, α-bromonaphthalene, 1,2,3-tribromopropane on unoxidized and oxidized galena, pyrite, chalcopyrite, djurleite, bornite and covellite at the temperature equal 293 K were made. Additionally, the measurements of the force air bubble detachment from these sulfide minerals including also chalcocite in water were performed. Using the values of the obtained contact angle of water, glycerol, formamide, ethylene glycol, diiodomethane, α-bromonaphthalene, 1,2,3-tribromopropane the components and parameters of the unoxidized and oxidized sulfide minerals surface tension were calculated. For this calculation the van Oss et al. method was applied after analysis of the components and parameters of the surface tension of liquids used for contact angle measurements. Taking into account the contact angle of water on the sulfide minerals, the detachment force of air bubble from these minerals in water was determined using our equation and comparing to that of measured one. As follows from the measurements and calculations the wetting properties of sulfide minerals and the stability of mineral-air bubble depends to a larger extent on the degree of sulfide minerals oxidation than on the type of mineral.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 6; 22-31
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Climatic disaster at theTriassic–Jurassic bound ary – a clay minerals and major elements record from the Polish Basin
Autorzy:
Brański, P.
Powiązania:
https://bibliotekanauki.pl/articles/2059743.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Triassic–Jurassic boundary
clay minerals
major elements
weathering regime
palaeoclimatic shifts
Polish Basin
Opis:
The Triassic-Jurassic boundary interval (ca. 201 Ma) was a time of sudden global environmental changes triggered by Pangea breakup and Central Atlantic Magmatic Province development. The bulk-rock mineralogy, clay mineralogy and major element geochemistry of 87 continental mudrock samples collected from four borehole cores yield information on Rhaetian-earliest Hettangian palaeoclimatic changes in the Polish Basin. During the Rhaetian, smectite preponderance was replaced by kaolinite and illite domination. This fundamental shift in clay mineral assemblages (supported by major element data) indicates very significant change in climate humidity. Moreover, some beds in the Zagaje Formation (Upper Rhaetian-Lower Hettangian) are particularly rich in kaolinite indicating extreme chemical weathering in humid-subtropical to tropical climate episodes in the aftermath of powerful warming and abundant rainfall. Importantly, the first distinct kaolinite enrichment appears already in the Lower Rhaetian Wielichowo Beds. In addition, abrupt and episodic shifts in the kaolinite-illite ratio and in values of weathering indices point to profound climate destabilisation and a sequence of frequent, catastrophic climatic reversals in the Late Rhaetian and at the Triassic-Jurassic boundary. These results are generally consistent with carbon isotope records in sections worldwide.
Źródło:
Geological Quarterly; 2014, 58, 2; 291--310
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie wielowalcowego rozdrabniania minerałów
Survey of multi-roller grinding of minerals
Autorzy:
Kruszelnicka, W.
Madej, O.
Tomporowski, A.
Piasecka, I.
Powiązania:
https://bibliotekanauki.pl/articles/2073147.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
młyn wielowalcowy
rozdrabnianie minerałów
parametry rozdrabniania
multi-roller mill
grinding of minerals
grinding parameters
Opis:
Omówiono zagadnienie rozdrabniania walcowego. Zbadano wpływ materiału rozdrabnianego (serpentynit) na parametry użytkowe procesu rozdrabniania: moc, prędkość obrotową oraz stopień rozdrobnienia w młynie 6-walcowym. Oceniono możliwości zastosowania rozdrabniania walcowego do mielenia minerałów. Uzyskane wyniki wskazują, że zastosowany młyn z powodzeniem może służyć do rozdrabniania materiałów mineralnych.
The cylindrical grinding process is discussed in the paper. The influence of grinded material (serpentinite) on operational parameters of grinding process: power, speed and degree of fragmentation in the 6-cylinder mill was investigated. Applicability of cylindrical grinding in minerals grinding was evaluated. The obtained results indicate that the tested mill can be successfully used in grinding of mineral materials.
Źródło:
Inżynieria i Aparatura Chemiczna; 2016, 4; 142--143
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of the Variations in the Vertical and Horizontal Distribution of Heavy Sand Minerals in the Hilla River Sediments
Autorzy:
Hameed, Iman A.
Rahman, Haleema Abdul Jabbar Abdul
Anmar, Alsaadi
Powiązania:
https://bibliotekanauki.pl/articles/27323812.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
sediment
heavy minerals
specific gravity
Opis:
This study was conducted to investigate the effect of the Hilla River sediments on the heterogeneity of the distribution of heavy sand minerals for the fine and very fine sand classes as well as for the surface and subsurface layers. The results showed that the heavy sand minerals that were determined according to the specific gravity of each mineral and the specific gravity of the particles of minerals identified in the soils under study ranged between (2.5–4.5) and were divided into four groups in terms of the specific gravity. The first group included each of the minerals (Mica and Chlorite) of low specific gravity, while the second group contains (Pyroxene, Amphibole, Epidote Group). The third group includes minerals (Tourmaline and Garnet, Staurolite and Kyanite) and the two groups are classified as minerals of medium-specific gravity; in turn, the fourth group contains minerals of high specific gravity, namely (Zircon, Rutile and Opaques). As a result, the most important factors affecting the sedimentation, sorting and sedimentation processes are the conveyor’s speed, load capacity, the size of the separation particles and their specific gravity. The complete mismatch of the horizontal distribution of the minerals of one group is due to the varying ranges of the specific gravity of the minerals within the general range of specific gravity.
Źródło:
Journal of Ecological Engineering; 2023, 24, 7; 318--330
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heavy minerals as detritus provenance indicators for the Jurassic pre-Callovian palaeokarst infill from the Czatkowice Quarry (Kraków–Wieluń Upland, Poland)
Autorzy:
Salata, D.
Powiązania:
https://bibliotekanauki.pl/articles/2060576.pdf
Data publikacji:
2013
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
heavy minerals
paleokarst
Lower Jurassic
source rocks
Czatkowice
Kraków-Wieluń Upland
Opis:
Heavy mineral assemblages from the infill of Jurassic pre-Callovian palaeokarst in the Czatkowice Quarry, in the Kraków–Wieluń Upland, are zircon dominated. They contain also garnet, tourmaline, rutile and scarce grains of kyanite, staurolite and single chromian spinel. The textural features of the heavy minerals suggest that certain types of source rocks supplied the clastic material infilling in the karst studied. Most of the heavy minerals were derived from sedimentary or metasedimentary rocks as suggested by the high degree of roundness of the grains and also by high ZTR (zircon–tourmaline–rutile) index values. Rounded minerals may derive from Carboniferous, Permian and Triassic clastic rocks occurring in the area surrounding the Czatkowice Quarry. The chemical compositions of rounded detrital garnet and tourmaline grains suggest metamorphic and igneous rocks as initial sources, perhaps located in the Bohemian Massif. However, a hypothetical landmass located south of the Kraków–Wieluń Upland might have been an additional source area. The euhedral zircon and garnet grains were transported directly from crystalline rocks, which may have been Carboniferous-Permian volcanic rocks and crystalline basement elevations of Brunovistulicum exposed during Jurassic pre-Callovian sedimentation in the Czatkowice area.
Źródło:
Geological Quarterly; 2013, 57, 3; 537--550
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Water well activation with application of clay minerals disintegration agent
Autorzy:
Macuda, J.
Wysocki, S.
Gaczoł, M.
Powiązania:
https://bibliotekanauki.pl/articles/298707.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
formation permeability
formation clogging
disintegration of clay minerals
well
well activation
well efficiency
well exploitation
well life expectancy
Opis:
While drilling a well using rotary drilling method with drilling mud application, permeability damage of aquifer layers in near-well zone takes place. It is caused mainly by inflow of both solid phase and filtrate originated from the mud into pores or fractures of drilled rock. In consequence of this phenomenon, pressure drawdown increase and well hydraulic efficiency decrease can be observed, what leads to exploitation capacity diminution. For the reparation of formation damaged permeability in near-well zone, new agent for disintegration of clay minerals called SKINAUT was developed at the Drilling, Oil and Gas Faculty of AGH-UST Krakow. In order to confirm its effectiveness in industrial conditions, it was conducted test of well activation for water intake from loose formation. Applied agent allowed to counteract the clogging of pore spaces and to reduce the hydraulic resistance of well thereby decreasing pressure drawdown and considerably improving well efficiency.
Źródło:
AGH Drilling, Oil, Gas; 2017, 34, 2; 587-595
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chevkinite-group minerals in Poland
Autorzy:
Nejbert, Krzysztof
Bagiński, Bogusław
Kotowski, Jakub
Jokubauskas, Petras
Jurewicz, Edyta
Macdonald, Ray
Powiązania:
https://bibliotekanauki.pl/articles/138930.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Chevkinite group minerals
Chevkinite-(Ce)
Perrierite-(Ce)
mineral chemistry
petrological significance
Polska
minerały
chemia minerałów
znaczenie petrologiczne
Polska
Opis:
The chevkinite group of minerals are REE,Ti-silicates increasingly recognized as widespread accessory phases in a wide range of igneous and metamorphic parageneses. Members of the group are here recorded from five localities in Poland: a two-pyroxene andesite from the Kłodzko-Złoty Stok intrusion, a trachyandesite intrusion north of the Pieniny Mountains, a rapakivi-type granite from the Krasnopol intrusion, an anorthosite from the Suwałki Anorthosite Massif, and nepheline syenite from the Ełk syenite massif. Specific members found are chevkinite-(Ce), perrierite-(Ce) and, potentially, the Al-dominant analogue of perrierite-(Ce). The case is made that chevkinite-group minerals will, through systematic investigation, be found in a wide range of Polish igneous and metamorphic rocks.
Źródło:
Acta Geologica Polonica; 2020, 70, 1; 97-106
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Content of minerals in muscle tissue of diploid rainbow trout (Oncorhynchus mykiss) in freshwater (Derbent Dam) and seawater (The Black Sea)
Autorzy:
Aci, R.
Muderrisoglu, S.
Duran, U.
Shakouri, N.
Ciftci, G.
Powiązania:
https://bibliotekanauki.pl/articles/1192579.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
freshwater
rainbow trout
seawater
minerals.
Opis:
Trouts are commonly farmed in many countries of the world. Minerals are required for normal life processes, and fish need these inorganic elements. Fish may derive these minerals from a diet and from ambient water. This study aimed to research differences in some of the mineral values in muscle tissues of diploid rainbow trouts (Oncorhynchus mykiss) cultured in freshwater and seawater. The study material consisted of twenty diploid rainbow trouts (Oncorhynchus mykiss), ten farmed in seawater and ten farmed in freshwater, with a weight of about 0.8-1 kg and average age of 17-19 months. Supernatant was prepared from muscle tissues of the fish. Concentrations of major minerals (Na, K, Ca, Mg, Cl, P) were investigated in supernatant from fish muscle tissues with an autoanalyzer. pH temperature, oxygen amount, salinity amount and saturation ratio of the trouts were found to be 8.40, 12°C, 9.57 mg dl-1, 18‰, 88.77% for seawater and 7.60, 11°C 7.40 mg dl-1, 0.68 ‰, 67.26% for freshwater fish. It was found that P, K and Mg levels in the muscle tissue of diploid rainbow trouts (Oncorhynchus mykiss) farmed in seawater were statistically significantly higher than in those farmed in freshwater (P<0.001), and Ca levels in trouts farmed in seawater were also higher than in those farmed in freshwater, although not statistically significantly different. It was determined that Na and Cl levels were slightly higher in rainbow trouts farmed in freshwater than in those farmed in seawater, but it was not a statistically significant difference (P>0.05). This study showed that concentrations of minerals in trout muscle tissue can be affected by changes in water quality. It was concluded that muscle tissue of diploid rainbow trouts (Oncorhynchus mykiss) farmed in seawater is a better source of minerals in human diet than trouts farmed in freshwater.
Źródło:
Journal of Elementology; 2020, 25, 4; 1375-1384
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kosmetyki mineralne
Mineral cosmetics
Autorzy:
Pawlikowski, M.
Hreśka, M.
Powiązania:
https://bibliotekanauki.pl/articles/343958.pdf
Data publikacji:
2018
Wydawca:
nakł. Maciej Pawlikowski
Tematy:
kosmetyka
minerały
zdrowie
cosmetics
minerals
Heath
Opis:
Od tysiącleci minerały samodzielnie lub w mieszaninach używane były przez ludzi jako lekarstwa i kosmetyki. Przedstawione badania nawiązują do tradycji stosowania minerałów w nowoczesnej kosmetologii.
Minerals or mixtures containing minerals were used during thousands years as cosmetics and or medicines. Presented investigation refer to tradition of use of minerals in modern cosmetology.
Źródło:
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering; 2018, 24; 1-4
1689-6742
Pojawia się w:
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electron paramagnetic resonance studies on silver atoms and clusters in regularly interstratified clay minerals
Autorzy:
Yamada, H.
Sadlo, J.
Tamura, K.
Shimomura, S.
Turek, J.
Michalik, J.
Powiązania:
https://bibliotekanauki.pl/articles/147360.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
EPR spectroscopy
regularly interstratified clay minerals
silver atoms
gamma irradiation
Opis:
The formation and stabilization of reduced silver species in the regularly interstratified clay minerals, trioctahedral smectite/chlorite (tri-Sm/Ch) and dioctahedral smectite/mica (di-Sm/M), have been studied by electron paramagnetic resonance (EPR) spectroscopy. Both minerals loaded with Ag+ cations after degassing and dehydration were g-irradiated at 77 K and monitored by EPR as the temperature increased. Some samples were exposed to water or methanol vapor after dehydration. In both hydrated and dehydrated samples only the doublets assigned to Ag0 atoms were observed with no evidence of the formation of Ag clusters. However, the EPR parameters of silver atoms in both matrices are different. In tri-Sm/Ch the narrow anisotropic EPR lines overlap with the broader isotropic lines, whereas in di-Sm/M only broad lines are recorded. The hyperfine splitting - Aiso(Ag0) is larger in tri-Sm/Ch than in di-Sm/M. Also the stability of Ag0 in both clay minerals is distinctly different. Ag0 doublet in di-Sm/M disappears completely above 230 K, whereas in tri-Sm/Ch it is still recorded at 310 K. It is proposed, basing on the EPR results that Ag0 atoms appear at different sites in both matrices: - in tri-Sm/Ch in the middle of smectite interlayer and in hexagonal cavities in the silicate sheets of tetrahedron layer and in di-Sm/M in hexagonal cavities only. When samples had been exposed to methanol before irradiation, the silver clusters become stabilized in the interlayer sites. In tri- Sm/Ch matrix the silver dimer Ag2+ formed by g-irradiation at 77 K is transformed to tetrameric cluster, Ag43+ at 150 K. In di-Sm/M the radiation-induced silver agglomeration proceeds in a similar way, but with a slower rate and Ag tetramer is formed only above 190 K. In both clay minerals, Ag43+ clusters decay above 250 K.
Źródło:
Nukleonika; 2004, 49, 4; 131-136
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Flotation behavior and separation mechanism of quartz and iron minerals in α-bromolauric acid reverse flotation system
Autorzy:
Han, Y.
Guo, W.
Zhu, Y.
Wei, Y.
Gu, X.
Powiązania:
https://bibliotekanauki.pl/articles/949733.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
quartz
separation
reverse flotation
iron minerals
α-Bromolauric acid
Opis:
A new type collector α-Bromolauric acid (α-BLA) had been proved to be an efficient collector for quartz flotation. However, the effects of α-BLA on the flotation behavior of iron minerals and quartz-iron separation had not been investigated. In this study, collector α-BLA was synthesized in the laboratory. The flotation behavior of quartz, hematite and magnetite under α-BLA reverse flotation system were investigated and the separation mechanism of quartz-irons was studied by contact angle, zeta-potential and infrared spectroscopy. The results showed that the optimum flotation pH was 11.5 for quartz, 6.45 for hematite and 6.97 for magnetite. The best α-BLA concentrations was 75 mg/dm3 for quartz flotation, 125 mg/dm3 for hematite and magnetite flotation. The activator CaCl2 had little effect on the flotation of hematite and magnetite, but the minimum dosage 50 mg/dm3 of activator CaCl2 was necessary for quartz flotation. On the contrary, starch had no effect on the flotation of quartz, while the recoveries of magnetite and hematite tended to be 0% as starch concentration more than 80 mg/dm3. The separation mechanism of quartz from iron minerals under α-BLA reverse flotation system was that the starch could be selectively adsorbed on the surface of hematite and magnetite in the form of strong hydrogen bond adsorption. However, the same adsorption of starch did not occur on the surface of quartz, so the α-BLA can be successfully adsorbed on the surface of activated quartz to make the quartz strongly hydrophobic, and then to be floated out.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 3; 992-1003
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Forecast trends in demand for deficit key minerals for the Polish economy
Trendy rozwoju zapotrzebowania na deficytowe surowce mineralne, kluczowe dla polskiej gospodarki
Autorzy:
Galos, Krzysztof
Lewicka, Ewa Danuta
Kamyk, Jarosław
Szlugaj, Jarosław
Czerw, Hubert
Burkowicz, Anna
Kot-Niewiadomska, Alicja
Guzik, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1849559.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
key minerals
deficit minerals
mineral security
consumption trends
demand forecast
surowce kluczowe
surowce deficytowe
bezpieczeństwo surowcowe
trendy zużycia
prognozy zapotrzebowania
Opis:
The observation of trends in the demand for minerals is of fundamental importance in the long-term assessment of prospects for economic development in Poland. From among 148 minerals analyzed, 42 minerals are indicated as key minerals for the country’s economy, of which 22 were recognized as deficit minerals. These minerals have been the subject of this paper. For each of these minerals the forecasts of demand by the years 2030, 2040 and 2050 have been made taking the current trends in domestic economy and premises for the development of industries that are main users of these minerals into account. The most promising prospects for growth of domestic demand – with at least a two-fold increase by 2050 – have been determined for manganese dioxide, metallic: magnesium, nickel, silicon, as well as talc and steatite, while an increase by at least 50% have been anticipated for metallic aluminum, tin, metallic manganese, and elemental phosphorus. For natural gas and crude oil growing tendencies have also been predicted, but only by 2030. On the other hand, the most probable decline in domestic demand by 2050 may be foreseen for iron ores and concentrates, bauxite, metallic tungsten, magnesite and magnesia, as well as for crude oil and natural gas, especially after 2040. It seems inevitable that the deficit in the foreign trade of minerals will continue to deepen in the coming years. By 2030 this will mainly result from the growing importation of crude oil and natural gas, but beyond – by 2050 – further deepening in the trade deficit will be related to the growing importation of many metals as well as of some industrial minerals. After 2040, the negative trade balance can be mitigated by a possible decrease in foreign deliveries of hydrocarbons and iron ores and concentrates.
Obserwacja trendów zapotrzebowania na surowce mineralne ma fundamentalne znaczenie w długoterminowej ocenie perspektyw rozwoju gospodarczego Polski. Spośród 148 surowców mineralnych poddanych analizie, 42 zostały wskazane jako kluczowe dla polskiej gospodarki. Spośród nich 22 zostały uznane zarazem za surowce deficytowe. Te ostatnie stały się przedmiotem niniejszej pracy. Na podstawie dotychczasowych trendów krajowego zapotrzebowania na te surowce oraz przesłanek rozwoju branż będących ich głównymi użytkownikami, wykonano prognozy rozwoju popytu do 2030, 2040 i 2050 r. Najbardziej obiecujące perspektywy – przy min. dwukrotnym wzroście zapotrzebowania do 2050 r. – stwierdzono dla dwutlenku manganu, magnezu metalicznego, niklu, krzemu oraz talku i steatytu, a zwyżkę o co najmniej 50% – także w przypadku aluminium, cyny, manganu oraz fosforu pierwiastkowego. Dla gazu ziemnego i ropy naftowej wzrost jest oczekiwany, ale tylko do 2030 r. Największe prawdopodobieństwo spadku popytu do 2050 r. dotyczy rud i koncentratów żelaza, boksytów, wolframu oraz magnezytów i magnezji, a także gazu ziemnego i ropy naftowej, w szczególności po roku 2040. W rezultacie, w najbliższych latach deficyt Polski w handlu zagranicznym surowcami mineralnymi będzie się pogłębiał. Do 2030 r. będzie to wynikać głównie z wciąż rosnącego importu ropy naftowej i gazu ziemnego, ale później – do 2050 r. – dalsze pogłębianie się deficytu w obrotach surowcami mineralnymi będzie związane z rosnącym importem wielu surowców metalicznych, w szczególności aluminium, krzemu metalicznego, niklu metalicznego i magnezu metalicznego, a także niektórych surowców niemetalicznych. Po 2040 r. to niekorzystne zjawisko może być złagodzone poprzez możliwy spadek importu węglowodorów oraz rud i koncentratów żelaza.
Źródło:
Gospodarka Surowcami Mineralnymi; 2021, 37, 3; 5-30
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Value added industrial minerals production from calcite-rich wollastonite
Wartość dodana produkcji surowców przemysłowych ze złóż kalcytu i wollastonitu
Autorzy:
Bulut, Gülay
Akçin, Elif Suna
Kangal, Murat Olgaç
Powiązania:
https://bibliotekanauki.pl/articles/216790.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
wollastonite
calcite
flotation
industrial minerals
wollastonit
kalcyt
flotacja
surowce przemysłowe
Opis:
The worldwide consumption of wollastonite has been increasing from day to day. It is a calcium metasilicate with the chemical formula CaSiO3. Wollastonite is the only naturally occurring, nonmetallic, white mineral that is needle-shaped in a crystal habit. Due to its high chemical and thermal resistance and nontoxic properties, wollastonite replaces asbestos. Apart from this, the acicular property of wollastonite allow it to compete with other acicular materials where improvements in dimensional stability, flexural modulus and heat deflection are sought. Due to its unique properties such as: its high brightness and whiteness, low moisture and oil absorption, low volatile content, and acicular properties, it is used also as a filling material for ceramics, plastics and paints, thermal and electrical insulator, wetting agent and smelter for glaze. Three methods are used for the beneficiation of wollastonite: mechanical sorting, dry or wet magnetic separation and flotation. Magnetic separation and flotation can be applied together in some cases. In this study, flotation has been investigated for the selective separation of calcite-rich wollastonite ores from the Buzlukdağ deposit, in the Kırşehir-Akpınar region, in the middle of Anatolia. The mineralogical analysis of the sample used in the study shows that the ore sample contains 60–62% wollastonite (CaSiO3), 4–5% augite (Ca,Na)(Mg,Fe,Al)(Si,Al)2O6, 30–32% calcite (CaCO3) and minor amount of other minerals. As a result of this study, the wollastonite concentrate which contains 0.44% Fe2O3, 52.71% SiO2, 87.85% wollastonite with 0.60% loss on ignition (using 1500 g/t potassium oleate) was obtained. The ultimate grade concentrates of calcite that can also be obtained as by-products are with 99.80% calcite content and 85.4% recovery.
Światowe zużycie wollastonitu ciągle wzrasta. Wollastonit jest metakrzemianem wapnia o wzorze chemicznym CaSiO3. Jest jedynym naturalnie występującym, niemetalicznym, białym minerałem, który ma kształt igieł o pokroju kryształu. Wollastonit ze względu na wysoką odporność chemiczną i termiczną oraz właściwości nietoksyczne zastępuje azbest. Poza tym igiełkowa właściwość wollastonitu umożliwia konkurencję z innymi igiełkowymi materiałami, w zakresie poprawy stabilności wymiarowej, modułu zginania i ugięcia pod wpływem ciepła. Ze względu na swoje unikalne właściwości, takie jak: wysoka jasność i biel, niska wilgotność i absorpcja oleju, niska zawartość części lotnych i właściwości igiełkowe, umożliwia zastosowanie jego jako: materiału wypełniającego do ceramiki, tworzyw sztucznych i farb, izolatora termicznego i elektrycznego, środka zwilżającego i pieca do glazury. Do wzbogacania wollastonitu stosowane są trzy metody: sortowanie mechaniczne, separacja magnetyczna na sucho lub mokro oraz flotacja. W niektórych przypadkach można zastosować zarówno separację magnetyczną, jak i flotację. W tym artykule zastosowano flotację w celu selektywnego oddzielania rud kalcytu i wollastonitu ze złoża Buzlukdağ w regionie Kırşehir-Akpınar w centrum Anatolii. Analiza mineralogiczna próbki użytej w badaniu pokazuje, że próba rudy zawiera 60–62% wollastonitu (CaSiO3), 4–5% augitu (Ca, Na)(Mg, Fe, Al)(Si, Al)2O6, 30–32% kalcytu (CaCO3) i niewielką ilość innych minerałów. W wyniku tych badań uzyskano koncentrat wollastonitu, który zawiera 0,44% ‒ Fe2O3, 52,71% ‒ SiO2, 87,85% wolastonitu przy stratach wynoszących 0,60% (przy użyciu 1500 g/Mg oleinianu potasu). Końcowe koncentraty kalcytu, które można również otrzymać jako produkty uboczne, zawierają 99,80% kalcytu i 85,4% odzysku.
Źródło:
Gospodarka Surowcami Mineralnymi; 2019, 35, 1; 43-58
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Cyclops Mountains Massif (New Guinea, Indonesia) as the provenance area for metal-bearing shelf sediments from the Carolinian Sea
Autorzy:
Zglinicki, Karol
Szamałek, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2059672.pdf
Data publikacji:
2020
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
continental shelf sediments
Cyclops Mountains
New Guinea
heavy minerals
geological prospection
marine minerals
Opis:
In 2009, on the initiative of PT Halmahera Perkasa the “Jayapura” exploration project was carried out in Indonesia. As part of this project, exploration of the sea bottom in the northern coast of New Guinea was carried out over a distance of ~45 km. The suction dredge collected 59 samples of loose sediments from the shelf bottom surface of the Carolinian Sea (to a depth of 60 m below the sea-floor). The extracted samples are usually poorly and moderately sorted sands (5 samples), medium-grained sands (21 samples), and fine-grained sands (33 samples). The sand composition shows, among others, a wide spectrum of heavy minerals of ultra-mafic (Cr-garnet, chromium spinel, Mg-olivine) and metamorphic (epidote, clinochlore, amphibole, titanite) origin. The content of heavy minerals in the sediments is up to 54.77 wt.%. It was found that the source of heavy fraction in the eastern and western parts of the coast is the rock of the ophiolite series building the Cyclops Mountains Massif. The mineral composition of sediments from the central coastal zone corresponds to the types of rocks building the metamorphic core of the Cyclops Mountains (amphibolite, gneisses, andesite). Three mineral-geochemical subprovinces were determined on the basis of analyses of heavy mineral decomposition and chemical analyses of sediments. Shelf sediment from the eastern part of the coast is characterized by an increased content of strategic metals (Ni up to 3560, W up to 3130 and Co up to 142 ppm). In the central zone, the V content increases up to 244 ppm and the Ag content up to 5 ppm. In the shelf sediments there is a strong depletion in the REE.
Źródło:
Geological Quarterly; 2020, 64, 2; 480--491
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption behavior of Zn(II) onto natural minerals in wastewater. A comparative study of bentonite and kaolinite
Autorzy:
Chai, W.
Huang, Y.
Su, S.
Han, G.
Liu, J.
Cao, Y.
Powiązania:
https://bibliotekanauki.pl/articles/109926.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
adsorption
Zn(II)
wastewater
clay minerals
structural properties
Opis:
In order to remove the harmful metal ions in lead-zinc mineral processing wastewater, two natural clay minerals (bentonite and kaolin) were used as adsorbents and Zn(II) ions were the emphasis in this work. The adsorption behaviors including kinetics and isotherms were investigated by batch experiments. In addition, the adsorption mechanisms were studied by means of zeta potential testing, optical microscope and XRD analysis. The results show that the adsorption process can be best described as the pseudo-second order kinetic model. The adsorption equilibrium data of bentonite and kaolinite can be respectively fitted best by Langmuir and Freundlich models. Thermodynamic studies display that the adsorption of Zn(II) onto clays is non-spontaneous and endothermic. The maximum capacity of Zn(II) adsorbed on bentonite and kaolinite respectively reaches to 79.2 mg·g-1 and 6.35 mg·g-1 at 25 °C. The structural differences of bentonite and kaolinite result in the differences in adsorption behavior and mechanism. The interaction mechanisms of Zn(II) with bentonite and kaolinite involve electrostatic attraction, cation exchange, surface complex and precipitation. Bentonite as adsorbent has the potential to remove Zn2+ better than kaolinite.
Źródło:
Physicochemical Problems of Mineral Processing; 2017, 53, 1; 264-278
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rozmieszczenie minerałów kruszcowych w łupku miedzionośnym złoża Lubin–Sieroszowice
Distribution of ore minerals in the Kupferschiefer of the Lubin–Sieroszowice deposit
Autorzy:
Pieczonka, J.
Głuszek, A.
Powiązania:
https://bibliotekanauki.pl/articles/2063111.pdf
Data publikacji:
2010
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
rozmieszczenie kruszców
łupek miedzionośny
monoklina przedsudecka
ore minerals distribution
Kupferschiefer
Fore Sudetic Monocline
Opis:
Sposób rozmieszczenia głównych minerałów kruszcowych zarówno w profilu pionowym, jak i w poziomym, w złożu rud miedzi Lubin–Sieroszowice na monoklinie przedsudeckiej jest wciąż przedmiotem dyskusji. Uzupełnienie bazy danych o wyniki nowych analiz pozwoliło na sporządzenie aktualnych map, obrazujących rozkład tych minerałów w poziomie. W artykule omówiono mapy wykonane dla chalkozynu (z digenitem), bornitu, chalkopirytu, kowelinu, tennantytu, galeny, sfalerytu i pirytu (z markasytem) występujących w łupku miedzionośnym. Do ich sporządzenia użyto programu Surfer 9. Jako głównej metody wyznaczania wartości parametru w punktach sieci gridowej użyto krigingu punktowego. Obok map udziału procentowego poszczególnych minerałów kruszcowych, w całkowitej ich ilości, dla każdego z poziomów umownych sporządzono mapę dominacji minerałów kruszcowych. Przedstawiono na niej obszary, w których udział poszczególnych minerałów kruszcowych wynosi powyżej 50%. Analiza map potwierdza, że głównym minerałem rudnym jest chalkozyn. Strefa występowania chalkozynu obejmuje największą część złoża, a maksymalne zawartości koncentrują się w jego centralnej części. Największą różnorodność minerałów kruszcowych zaobserwowano we wschodniej części złoża. Obok pól o dużej zawartości bornitu i chalkopirytu, pojawiają się pola dominacji galeny, sfalerytu, siarczków żelaza, a nawet kowelinu i tennantytu. Pomimo wykonania kilkudziesięciu map, trudno jest stwierdzić prawidłowość w rozmieszczeniu stref występowania poszczególnych minerałów względem siebie. Decyduje ich położenie w stosunku do bariery redox.
The paper discusses spatial distribution of ore minerals within the Lubin–Sieroszowice copper deposit in the Kupferschiefer horizon. Maps of the distribution of the chalcocite group of sulphides, bornite, chalcopyrite, covellite, tennantite, galena, sphalerite and Fe sulphides were constructed based on 2500 analyses of chip samples. In order to show a spatial distribution of major ore minerals, the Surfer 9.0 program was applied. Values of parameters in the square grid were calculated using the point kriging method. Analysis of ore minerals distribution shows that the chalcocite group of minerals predominates in the deposit. The richest chalcocite zone occurs in the central part of the deposit. In its eastern part, several ore minerals, especially bornite and chalcopyrite, prevail locally over the other sulphides. A redox barrier is a key in understanding the spatial distribution of ore minerals in the deposit.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2010, 439 (2); 355--359
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessing the criticality of minerals used in emerging technologies in China
Ocena krytycznych surowców mineralnych wykorzystywanych w nowo powstających technologiach w Chinach
Autorzy:
Yu, Yun
Powiązania:
https://bibliotekanauki.pl/articles/216192.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
critical minerals
China
strategic emerging industries
surowce krytyczne
surowce mineralne
Chiny
branża wschodząca strategiczna
Opis:
Emerging technologies represent the direction of the new industrial revolution of promoting sustainable economic and social development, and strategic emerging industries have developed rapidly in China. The development of these emerging technology industries requires more mineral resources as raw materials, especially the need for specific minerals, has increased. The unsatisfied growing demand for minerals used in emerging technologies or an unexpected supply disruption in major producing countries could have an impact on economic development. There are only several studies on the supply of mineral resources from the perspective of mineral resources needed by the development of China’s emerging industries. To assess the criticality of the minerals needed by the strategic emerging industries in China, this paper adopts three indicators: import concentration, the volatility of prices and the application requirements by the Chinese 13th five-year plan dedicated to strategic emerging industries in 2016. Furthermore, 34 types of nonfuel minerals and mineral raw materials are separated into three categories. Finally, this paper indicates that the three indexes are all high for 8 minerals with supply risks, application in emerging technologies, and substantial market fluctuations which need the support of special policies. Two indexes of three Level-II indicators are high for 14 minerals which need different policy combination measures, and one index is high for 12 minerals which also needs attention, all of which were analyzed.
Nowo powstające technologie stanowią kierunek nowej rewolucji przemysłowej promującej zrównoważony rozwój gospodarczy i społeczny, a strategiczne wschodzące branże przemysłu szybko rozwinęły się w Chinach. Rozwój tych nowo powstających branż technologicznych wymaga wykorzystania znacznej ilości zasobów surowców mineralnych, a zwłaszcza ściśle określonych surowców mineralnych. Niezaspokojony rosnący popyt na surowce mineralne (pierwiastki, minerały, surowce mineralne metaliczne) wykorzystywane w nowo powstających technologiach lub nieoczekiwane zakłócenie dostaw z produkujących je krajów może mieć wpływ na rozwój gospodarczy. Występują nieliczne badania dotyczące podaży zasobów surowców mineralnych z punktu widzenia zasobów surowców mineralnych potrzebnych do rozwoju wschodzących branż przemysłu w Chinach. Aby ocenić krytyczność surowców mineralnych potrzebnych strategicznym wschodzącym branżom przemysłu w Chinach, w artykule przyjęto trzy wskaźniki: koncentrację importu, zmienność cen i wymogi dotyczące zastosowania zawarte w trzynastym chińskim planie pięcioletnim poświęconym strategicznym wschodzącym przemysłom w 2016 roku. Ponadto 34 rodzaje surowców mineralnych (pierwiastki, metale, surowce mineralne niepaliwowe) podzielono na trzy kategorie. Ostatecznie, w artykule pokazano, że wszystkie trzy indeksy są wysokie dla 8 surowców mineralnych z ryzykiem ich dostaw, zastosowaniem w nowych technologiach i znacznymi wahaniami rynku, które wymagają specjalnej polityki wsparcia. Dwa wskaźniki z trzech wskaźników poziomu II są wysokie dla 14 surowców mineralnych, które wymagają kombinacji różnej polityki wsparcia, a jeden wskaźnik jest wysoki dla 12 surowców mineralnych, które również wymagają uwagi spośród wszystkich, które zostały przeanalizowane.
Źródło:
Gospodarka Surowcami Mineralnymi; 2020, 36, 2; 5-20
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Właściwości termodynamiczne minerałów z szeregu piromorfit - mimetyt
Autorzy:
Flis, J.
Powiązania:
https://bibliotekanauki.pl/articles/344088.pdf
Data publikacji:
2007
Wydawca:
nakł. Maciej Pawlikowski
Tematy:
minerały
właściwości termodynamiczne
minerals
thermodynamic properties
Źródło:
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering; 2007, T. 4 spec. ed. [2]; 1-4
1689-6742
Pojawia się w:
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potassium response in some Malawi soils
Autorzy:
Lakudzala, D. D.
Powiązania:
https://bibliotekanauki.pl/articles/412437.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
potassium (K)
kaolinite
Malawi soils
minerals
Opis:
Potassium (K) response curves were generated for some Malawi soils using four different rates of potassium fertilizer, with grass being used to estimate plant availability. The study was conducted to find the point of maximum response for potassium. The soils were characterized, limed and fertilized with equal amounts of nitrogen. Potassium was applied at four rates: 0.0, 0.1, 0.2 and 0.4 me K/100 cm3 soil. The K treated soils were put in pots and cropped with grass. The grass was harvested six weeks after planting, dried and weighed. In general, addition of potassium resulted in increased growth of grass in all soils, with some soils showing better response than others. For montmorillonitic soils and soils with mixed mineralogy response was linear up to the highest rate of 0.4 me K/100 cm3. Apparently the 0.4 me K/100 cm3 soil was not enough to give maximum yield for these potassium depleted soils. For the kaolinitic soils 0.4 me K/100 cm3 soil was beyond point of maximum response. The variation of response to added potassium in the different soils calls for soil specific fertilizer additions. Smallholder farmers should move from blanket (crop specific) fertilizer recommendations currently being used to crop and soil specific fertilizer recommendations. Basal fertilizer dressings (starter packs) should always contain potassium. Correlation and calibration studies should be conducted to establish a potassium low optimum level for Malawi soils.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 8, 2; 175-181
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł

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