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Wyświetlanie 1-15 z 381
Tytuł:
Micromorphology of cryoconite on Garabashi and Skhelda glaciers and soils of Baksan Gorge, Mt. Elbrus, Central Caucasus
Autorzy:
Abakumov, Evgeny
Tembotov, Rustam
Kushnov, Ivan
Polyakov, Vyacheslav
Powiązania:
https://bibliotekanauki.pl/articles/16538453.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Russia
Caucasus
sediments
weathering
deglaciation
Opis:
In the Central Caucasus region, the intense process of deglaciation is identified as caused by cryoconite formation and accumulation. The fine earth materials were collected on the surfaces of Skhelda and Garabashi glaciers as well as from zonal soils of Baksan Gorge and were studied in terms of chemical, particle-size, and micromorpholo-gical features. Supraglacial sediments are located at the glacial drift area of material and, thus, due to transfer of these sediments to the foothill area, their fine earth material can affect micromorphological and chemical characteristics of adjacent zonal soils. Thin sections of mineral and organo-mineral micromonoliths were analyzed by classic micromorphological methods. Data obtained showed that the weathering rates of cryoconite and soil minerals are different. The cryoconite material on the debris-covered Skhelda Glacier originated from local massive crystalline rocks and moraines, while for Garabashi Glacier the volcanic origin of cryoconite is more typical. Soils of Baksan Gorge are characterized by more developed microfabric and porous media, but their mineralogical composition is essentially inherited from sediments of glacial and periglacial soils. These new data could be useful for understanding the process of evolution of the mineral matrix of cryoconite to the soil matrix formed at the foot of the mountain.
Źródło:
Polish Polar Research; 2022, 43, 1; 1-20
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geochemical analyses of recent sediments from Lake Morzycko against selected physiographic parameters of the Słubia River catchment (Western Poland)
Autorzy:
Adamek, Anna
Mareczka, Paulina
Jucha, Witold
Musielak, Stanisław
Okupny, Daniel
Powiązania:
https://bibliotekanauki.pl/articles/2037025.pdf
Data publikacji:
2021-12-23
Wydawca:
Łódzkie Towarzystwo Naukowe
Tematy:
lake sediments
geochemistry
grain-size composition
land-cover photointerpretation
Myślibórz Lakeland
Opis:
This paper presents the results of a study on the content of lithogeochemical components (organic matter, Na, K, Mg, Ca, Mn, Fe, Cu and Zn) and grain-size composition of mineral matter in the bottom sediments of Morzycko Lake (Myślibórz Lakeland, NW Poland). This lake is large (342.7 ha) and deep (69 m). The catchment has a typical forested character (mainly in the middle part of the Słubia River valley) with agricultural area (mainly in the upland areas north of the lake). The diversity of concentrations of metals was analysed based on 44 samples from 22 representative sites, including surface sediments and sediments from 5 cm below the current lake bed. The results showed that the chemical composition and granulometry of bottom sediments depends on contemporary morphogenetic processes in the catchment of the Słubia River. Geochemical and grain-size indices varied due to changes in biological productivity, intensity of weathering of postglacial material making up the catchment, and potential for migration of metals to the lake with surface or underground runoff. An important aspect in assessing the degree of enrichment of the sediments in trace elements is the location of shallow parts of the lake near the tourist districts of Moryń.
Źródło:
Acta Geographica Lodziensia; 2021, 111; 71-87
0065-1249
Pojawia się w:
Acta Geographica Lodziensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sequential extraction of uranium isotopes in sediments from an estuary historically affected by anthropogenic inputs of natural radionuclides
Sekwencyjna ekstrakcja izotopów uranu z osadów estuariowych, skażonych naturalnymi izotopami promieniotwórczymi pochodzenia antropogenicznego
Autorzy:
Aguadol, J.
Bolivar, J.
Garcia-Tenorio, R.
Powiązania:
https://bibliotekanauki.pl/articles/340210.pdf
Data publikacji:
2004
Wydawca:
Główny Instytut Górnictwa
Tematy:
izotopy uranu
spektrometria alfa
specjacja
osady
TENORM
U-isotopes
α-particle spectrometry
alpha-particle spectrometry
speciation
sediments
Źródło:
Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa; 2004, 1; 64-64
1643-7608
Pojawia się w:
Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of the sediment deposition rates in the Kuwait Bay using 137Cs and 210Pb
Autorzy:
Al-Zamel, A.
Bou-Rabee, F.
Al-Sarawi, M.
Olszewski, M.
Bem, H.
Powiązania:
https://bibliotekanauki.pl/articles/148519.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
bottom sediments
sedimentation rate
unsupported 210Pb
137Cs radionuclide
Opis:
Five bottom sediment cores from the Kuwait Bay were dated using 210Pb and 137Cs radionuclides. For evaluating the sedimentation rate two methods were applied: geochronology with the constant rate of supply unsupported 210Pb (CRS model) and the Weibull distribution of anthropogenic 137Cs. The sedimentation rates in this region, calculated by the first method ranged from 0.24 to 0.39 cm/year, while the same rates obtained from 137Cs distribution were slightly lower: from 0.1 to 0.25 cm/year. These relatively small differences can be explained by additional input of the Chernobyl accident to the 137Cs inventory in the bottoms sediments of the Northern Hemisphere.
Źródło:
Nukleonika; 2006, 51,suppl.2; 39-44
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geographical research of the 30th Polish Antarctic Expedition at Arctowski Polish Station (King George Island, South Shetland Islands, Antarctica)
Autorzy:
Angiel, Piotr
Mikulska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/2029442.pdf
Data publikacji:
2008-06-01
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
Antarctica
meteorological measurements
geomorphological charting
glacier retreat
periglacial phenomena
aeolian processes
beach sediments
sedimentological analysis
Opis:
This paper presents the scope of geographical research conducted at Arctowski Station during the 30th Polish Antarctic Expedition. The research included meteorological, climatological, geomorphological and glaciological issues. During the expedition, research was conducted on sandur sediments on the outwash plain of Sphinx Glacier, the size of the aeolian transport, intensity of periglacial phenomena, and the way in which environmental conditions are recorded on quartz grains collected on the Admiralty Bay beaches. Detailed measurements of the basic meteorological components were made, geomorphological maps of the outwash plains of Sphinx, Baranowski, and Windy Glaciers were also completed.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2008, 13; 51-56
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variability of textural characteristics of sandur deposits of Flaajókull and Falljókull (SE Iceland)
Autorzy:
Angiel, Piotr
Mikulska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/2032503.pdf
Data publikacji:
2006-06-01
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
sandur
coarse clastic sediments
grain size parameters
Iceland
Opis:
Studies conducted on the sandurs of Flaajókull and Falljókull aimed at the reconstruction of the dynamics of braided rivers based on the grain size parameters of deposits. The goal of the project was to estimate the degree of deposit transformation and of changes of grain size characteristics as related to the length of transport in contemporary sandur rivers.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2006, 12; 111-117
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geochemistry of surface sediments from the northwestern Gulf of Mexico : implications for provenance and heavy metal contamination
Autorzy:
Armstrong-Altrin, John S.
Botello, Alfonso V.
Villanueva, Susana F.
Soto, Luis A.
Powiązania:
https://bibliotekanauki.pl/articles/2058576.pdf
Data publikacji:
2019
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Tamaulipas
deep-sea sediments
enrichment factor
contamination
principle component analysis
Opis:
Thirty-five near-surface sediment samples were recovered from the continental shelf and upper slope regions of the north-western (NW) Gulf of Mexico. The geochemical data of the sediments recovered were examined to investigate the weathering intensity, provenance, palaeo-oxygenation condition, and level of heavy metal contamination. The sediments analysed showed a moderate to high intensity of chemical weathering. Major and trace element concentrations indicated a terrigenous origin, closely related to the weathering of rocks rich in aluminosilicates. The results of this study further revealed that major rivers, the Bravo and Soto La Marina, played an important role in delivering sediments to the study area. The concentration of transition trace elements such as Cr, Cu, Ni, and V revealed that the sediments were derived from intermediate rocks such as andesite. The V/Cr, Ni/Co, and Cu/Zn ratios in the sediments were <2, <5, and <1, respectively, suggesting a depositional process occurred under well-oxygenated conditions. Principle Component Analysis (PCA) did not show a significant difference in sediment texture between the continental shelf and slope areas. The enrichment factor (EF) and Geo-accumulation index (lgeo) values were <2 and <1, respectively, suggesting the absence of an anthropogenic input.
Źródło:
Geological Quarterly; 2019, 63, 3; 522--538
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New evidences of Holocene tectonic and volcanic activity of the western part of Lake Sevan (Armenia)
Autorzy:
Avagyan, Ara
Sahakyan, Lilit
Meliksetian, Khachatur
Karakhanyan, Arkadi
Lavrushin, Vasily
Atalyan, Tatul
Hovakimyan, Hayk
Avagyan, Seda
Tozalakyan, Petros
Shalaeva, Evgenia
Chatainger, Christine
Sokolov, Sergey
Sahakov, Arkadi
Alaverdyan, Gagik
Powiązania:
https://bibliotekanauki.pl/articles/2059674.pdf
Data publikacji:
2020
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
active fault
gas emission
lake sediments
palaeomagnetism
lake tsunami
Opis:
The purpose of this paper is to present new data on active geological processes in the Lake Sevan Basin and to show its multidisciplinary aspects. The investigations of its structures, recent lake sediments, and lake floor gas emission allow a better understanding of the history of geological development and the recent tectonic and volcanic activity of the basin. This paper summarizes underwater investigations of active geological features of Lake Sevan, undertaken for the first time in Armenia. More than 30 aligned underwater-source related gas emission points were discovered. The gas contains carbon dioxide of volcanic or volcanogenic-metamorphogenic origin and can be related to unloading of deep fluid systems. This allows defining the Noratus-Kanagegh Fault segment trace below the recent Lake Sevan floor sediments. The discovery of the subaqueous segment of active fault shows the presence of another natural hazard of lake tsunami related to possible future co-seismic rupture. The recent sediments of the northwestern Lake Sevan coastline are sandwiched between two blocky lava flows. The radiocarbon dating of bones of bovine mammals (with entire skull), found ~15 cm from the cover of the lake sediments, suggests that the upper blocky basaltic-andesite layer can be a result of eruption younger than ~3400 years BP. About 80 m of the Noratus sequence sediments have been sampled for palaeomagnetic study and the age of 3.1-2.3 Ma for the lower part (42 m) is obtained. The upper and post-Gelasian activity of the Noratus-Kanagegh Fault is proven by a cross-cutscoria layer of 2.30 ±0.15 Ma K/Ar age.
Źródło:
Geological Quarterly; 2020, 64, 2; 288--303
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of hydrological and sedimentological processes on the functioning of inland waterway transport on an example of Brdyujście Regatta Track
Autorzy:
Babiński, Z.
Habel, M.
Szatten, D.
Dąbrowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/360120.pdf
Data publikacji:
2014
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
Brda River
regatta track
waterway E 70
hydrological transformation
total suspension
sediments
Opis:
Article presents the impact of anthropogenesis on the aquatic ecosystem of the Brda River estuary. Studied section is part of the E-70 international waterway, which is connecting Central and Eastern Europe. This small section of the Brda River has very unique character, due to the hydrological transformations during the nineteenth and twentieth centuries by human race. They were happening in the “adaptation of the Brda River to the inland waterways.” They were consisted in the construction of Brdyujście sluice. New hydrotechnical building created artificial water reservoir, which was used for recreational purposes, as the Regatta Track. Damming of the Brda River significantly changed water flow regime in this section. Flow has been slowed and has given nearly limnical nature to the estuary section of the Brda River. This is reflected in the transport of suspended material (total suspension) and the rate of the sedimentation in reservoir. Soundings of the bottom indicated varied thickness of the sediments. Subsequent hydrological changes in the analysed section of the Brda River, occurred at the time of closing the Brdyujście sluice and opening new inland waterway crossing to the Vistula River – Polish Czersko sluice. In this way, a significant part of the waterway (regatta track) was eliminated from the use. These changes are adversely affecting on functioning of the whole research part as an inland waterway. The dredged treatments serve not only providing proper conditions for a sporting event on the Regatta Track, but also should contribute to the improvement of navigation in this part of the Brda River. The research of the concentration of selected elements indicated the spatial variation in the rate of sediment accumulation processes. Based on available data, it is possible to propose dredged treatments as an element that enables the possibility of shipping on the Brda River section to remain at the same level.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2014, 37 (109); 16-21
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evolution of the Late Neogene and Eopleistocene fluvial system in the foreland of the Sudetes Mountains, SW Poland
Autorzy:
Badura, J.
Przybylski, B.
Powiązania:
https://bibliotekanauki.pl/articles/973652.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
fluvial sediments
Neogene
Eopleistocene
Lower Silesia
SW Poland
palaeogeography
Opis:
The oldest Cainozoic fluvial deposits in Lower Silesia date from the Oligocene. During the Middle and Late Miocene times, the fluvial system of this region was only slightly modified, especially in the foreland of the West and Middle Sudetes Mts. River lengths changed, following the migration of the North Sea shorelines. A rapid rebuilding of the fluvial system took place in the foreland of the East Sudetes Mts. either in the Late or Middle Miocene. Till that time, the main river valley of this region - the Nysa Kłodzka River, related to the Paczków and Kędzierzyn Grabens - used to flow towards the East, to a bay of the Paratethys sea. The new main river, pre-Odra, started to flow towards the North not before the Grodków Graben cut meridionally the Meta-Carpathian Swell. We are of the opinion that deposits of the Poznań Formation originated in an fluvial environment because no marine and/or limnic deposits have hitherto been discovered in the area of Lower Silesia above the uppermost of the Middle-Polish lignite seams (Henryk). The pre-Odra River drained the eastern part of Lower Silesia, and flowed towards the North, at least to the Poznań region. This main river captured such smaller rivers, as: the pre-Vistula, pre-Olza, pre-Ostravica, pre-Opava, pre-Nysa Kłodzka, and pre-Bystrzyca. Rivers draining the West Sudetes Mts. flowed first towards the North, to the region of the present-day Middle Odra River, and there turned to the West. It is conceivable that these rivers curved westwards just along the line of the present-day Wrocław - Magdeburg marginal stream valley ("Pradolina"). Since the Pliocene, the Sudetic rivers have started to transport coarser, sandy, and even gravelly material to a more distant foreland. Alluvial deposits of this phase occur exclusively on uplands. Coarse-grained sediments recognized in the bottom of deep erosional incisions were redeposited under subglacial conditions during the Mesopleistocene glaciations. The presented new interpretation of origin of the Poznań Formation basin and detailed recognition of Pliocene and Eopleistocene river system should initiate a new line of research into the Late Neogene and Eopleistocene sediments.
Źródło:
Annales Societatis Geologorum Poloniae; 2004, 74, No 1; 43-61
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Content of heavy metal compounds in bottom sediments of the Suchedniow water reservoir
Zawartość związków metali ciężkich w osadach dennych zbiornika Suchedniów
Autorzy:
Bąk, Ł.
Górski, J.
Rabajczyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/388205.pdf
Data publikacji:
2013
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
reservoir
reservoir basin
bottom sediments
heavy metals
zbiornik
zlewnia
osady denne
metale ciężkie
Opis:
Water reservoirs become silted at various intensity levels. Within the reservoir bowls, both allochtonic (built up outside the sedimentation area) and autochtonic (built up in the sedimentation area) matter is accumulated. As a result, reservoirs need desilting after a while. Then a problem arises how to manage the sludge removed from the reservoir bottom. The chemical properties of the bottom sludge, and particularly the content of heavy metals, decide whether it will be possible to use the sludge, and in what way. The chemical properties of the bottom sludge depend, to a far extent, on the character of the reservoir basin, the level of its urbanisation, and also on the climatic conditions. The paper presents the results of investigations into the content of heavy metals in the bottom sediments in the Suchedniow water reservoir. This water body is characterised by small mean depth of 1.05 m and mean annual flow across the dam profile of 0.63 m3 s–1. Forests dominate in the reservoir basin covering 45 % of its area, arable land constitutes 18 %, and the percentage of built-up area does not exceed 5 %. In recent years (2009–2011), the water reservoir has become much silted because of storing large soil masses near the local watercourses during the construction of S7 expressway. The amount of stored soil is estimated at 7.8 thousand m3. For investigations, nine bottom sediments samples were collected, in which the content of the following heavy metals: Pb, Cr, Cd, Cu, Ni, Zn, Fe, and Mn was determined. Quasi-undisturbed sludge was taken into transparent cylinders with Eijkelkamp sampler, which made it possible to conduct analysis in sediment layers 20 cm in height. In order to evaluate the sediment pollution with heavy metals, the geoaccumulation index, the pollution coefficient and level were calculated. On the basis of admissible soil chemical pollution tables, the possibility of the sludge use in agriculture after extracting it from the reservoir bowl was assessed.
Zbiorniki wodne ulegają zamuleniu z różną intensywnością. W obrębie ich czasz akumulowany jest materiał alochtoniczny (powstały poza obszarem sedymentacji) jak również autochtoniczny (utworzony w miejscu sedymentacji). W związku z powyższym po pewnym czasie wymagają one odmulenia. Powstaje wówczas problem zagospodarowania osadów wydobytych z dna zbiornika. Możliwość i sposób wykorzystania osadów dennych zależy od ich cech chemicznych, a zwłaszcza od zawartości metali ciężkich. Właściwości chemiczne osadów zależą w dużej mierze od charakteru zlewni zbiornika, stopnia jej zurbanizowania, jak również warunków klimatycznych. W pracy przedstawiono wyniki badań zawartości metali ciężkich w osadach dennych zbiornika Suchedniów. Akwen ten charakteryzuje się niewielką głębokością średnią, wynoszącą 1,05 m oraz średnim rocznym przepływem w profilu zapory równym 0,63 m3 s–1. Na obszarze zlewni dominują lasy – 45 % powierzchni zlewni, pola orne – 18 %, a udział 768 Łukasz Bąk et al terenów zabudowanych nie przekracza 5 %. W ostatnim okresie (2009–2011), na skutek składowania w pobliżu lokalnych cieków mas ziemnych, powstałych podczas budowy trasy ekspresowej S-7, doszło do jego intensywnego zamulenia, a ilość odłożonego materiału oszacowano na około 7,8 tys. m3. Do badań pobrano 9 próbek osadów, w których oznaczono zawartość następujących metali ciężkich: Pb, Cr, Cd, Cu, Ni, Zn, Fe, Mn. Osad pobrano w stanie quasi-nienaruszonym, do przezroczystych cylindrów, za pomocą próbopobieraka „Eijkelkamp”, co umożliwiło wykonanie analiz w warstewkach osadu o wysokości 20 cm. W celu oceny stanu zanieczyszczeń osadów metalami ciężkimi obliczono indeks geoakumulacji, współczynnik oraz stopień ich zanieczyszczenia. Określono także (na podstawie tabel dopuszczalnego, chemicznego zanieczyszczenia gleb) możliwość rolniczego wykorzystania osadów po ich wydobyciu z misy zbiornika.
Źródło:
Ecological Chemistry and Engineering. A; 2013, 20, 7-8; 757-769
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heavy metal concentrations in water and bottom sediments of small water reservoir in Kaniow
Koncentracja metali ciężkich w wodzie i osadach dennych małego zbiornika wodnego w kaniowie
Autorzy:
Bąk, Ł.
Górski, J.
Szeląg, B.
Powiązania:
https://bibliotekanauki.pl/articles/953638.pdf
Data publikacji:
2014
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
heavy metals
bottom sediments
water reservoir
metale ciężkie
osady denne
zbiornik wodny
Opis:
The paper presents the results of investigations on concentrations of ions of selected heavy metals (Fe, Cr, Zn, Ni, Mn, Cu, Pb, Cd, and Hg) in sediments and water in a small dammed reservoir located in Kaniow (the Swietokrzyskie Province, Poland) on the stream flowing from Borowa Gora (Borowa Mount). The sediments and water were collected from the upper, middle, and lower part of the reservoir. The samples were collected twice, first in July 2012, and then in March 2013. The content of trace elements in water did not exceed: 801 μg·dm–3 (Fe), 0.064 μg·dm-3 (Cr), 13.5 μg·dm-3 (Zn), 0.106 μg·dm-3 (Ni), 285 μg·dm-3 (Mn), 2.35 μg·dm-3 (Cu), 6.98 μg·dm-3 (Pb), and 3.35 μg·dm-3 (Cd). As regards bottom sediments, the maximum recorded concentrations of heavy metals were: 872 mg·kg-3 (Fe), 15.19 mg·kg-3 (Cr), 26.26 mg·kg-3 (Zn), 16.26 mg·kg-3 (Ni), 750 mg·kg-3 (Mn), 3.58 mg·kg-3 (Cu), 82.56 mg·kg-3 (Pb), 0.73 mg·kg-3 (Cd), and 0.0031 mg·kg-3 (Hg). An attempt to determine the mathematical relationship between the content of organic matter in sediments and heavy metals was made and the possibility of agricultural utilization of sediments after removal from the bottom was determined.
W artykule przedstawiono wyniki badań stężeń jonów wybranych metali ciężkich (Fe, Cr, Zn, Ni, Mn, Cu, Pb, Cd, Hg) w osadach i wodzie małego zbiornika zaporowego zlokalizowanego w miejscowości Kaniów na cieku od Borowej Góry. Do badań pobrano osady i wodę z części górnej, środkowej i dolnej zbiornika. Próby pobrano dwukrotnie, po raz pierwszy w lipcu 2012 r., a następnie w marcu 2013 r. Zawartość pierwiastków śladowych w wodzie nie przekraczała: 801 μg dm-3 (Fe), 0,064 μg·dm-3 (Cr), 13,5 μg·dm-3 (Zn), 0,106·g·dm-3 (Ni), 285 μg·dm-3 (Mn), 2,35 μg·dm-3 (Cu), 6,98 μg·dm-3 (Pb), 3,35 μg·dm-3 (Cd). W przypadku osadów dennych maksymalne odnotowane stężenia metali ciężkich wynosiły: 872 mg·kg-3 (Fe), 15,19 mg·kg-3 (Cr), 26,26 mg·kg-3 (Zn), 16,26 mg·kg-3 (Ni), 750 mg·kg-3 (Mn), 3,58 mg·kg-3 (Cu), 82,56 mg·kg-3 (Pb), 0,73 mg·kg-3 (Cd), 0,0031 mg·kg-3 (Hg). Podjęto również próbę określenia matematycznej zależności między zawartością części organicznych w osadach dennych zbiornika a metalami ciężkimi oraz określono możliwość rolniczego wykorzystania osadów po ich wydobyciu z dna zbiornika.
Źródło:
Ecological Chemistry and Engineering. A; 2014, 21, 2; 167-176
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zawartość związków metali ciężkich w osadach dennych zbiornika Suchedniów
Content of heavy metal compounds in the bottom sediments of the suchedniów water reservoir
Autorzy:
Bąk, Ł.
Górski, J.
Rabajczyk, A.
Szwed, M.
Powiązania:
https://bibliotekanauki.pl/articles/127123.pdf
Data publikacji:
2013
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
zbiornik
zlewnia
osady denne
metale ciężkie
reservoir
reservoir basin
bottom sediments
heavy metals
Opis:
Zbiorniki wodne ulegają zamuleniu z różną intensywnością. W obrębie ich czasz akumulowany jest materiał allochtoniczny (powstały poza obszarem sedymentacji), jak również autochtoniczny (utworzony w miejscu sedymentacji). W związku z powyższym po pewnym czasie wymagają one odmulenia. Powstaje wówczas problem zagospodarowania osadów wydobytych z dna zbiornika. Możliwość i sposób wykorzystania osadów dennych zależy od ich cech chemicznych, a zwłaszcza od zawartości metali ciężkich. Właściwości chemiczne osadów zależą w dużej mierze od charakteru zlewni zbiornika, stopnia jej zurbanizowania, a także warunków klimatycznych. W pracy przedstawiono wyniki badań zawartości metali ciężkich w osadach dennych zbiornika Suchedniów. Akwen ten charakteryzuje się niewielką głębokością średnią, wynoszącą 1,05 m oraz średnim rocznym przepływem w profilu zapory równym 0,63 m3·s–1. Na obszarze zlewni dominują lasy 45% powierzchni zlewni, pola orne - 18%, a udział terenów zabudowanych nie przekracza 5%. W latach 2009-2011, na skutek składowania w pobliżu lokalnych cieków mas ziemnych, powstałych podczas budowy trasy ekspresowej S-7, doszło do jego intensywnego zamulenia, a ilość odłożonego materiału oszacowano na około 7,8 tys. m3. Do badań pobrano 9 próbek osadów, w których oznaczono zawartość następujących metali ciężkich: Pb, Cr, Cd, Cu, Ni, Zn, Fe, Mn. Osad pobrano w stanie quasi-nienaruszonym, do przezroczystych cylindrów, za pomocą próbopobieraka „Eijkelkamp”, co umożliwiło wykonanie analiz w warstewkach osadu o wysokości 20 cm. W celu oceny stanu zanieczyszczeń osadów metalami ciężkimi obliczono indeks geoakumulacji, współczynnik oraz stopień ich zanieczyszczenia. Określono także (na podstawie tabel dopuszczalnego, chemicznego zanieczyszczenia gleb) możliwość rolniczego wykorzystania osadów po ich wydobyciu z misy zbiornika.
Water reservoirs become silted at various intensity levels. Within the reservoir bowls, both allochtonic (built up outside the sedimentation area) and autochtonic (built up at the sedimentation area) matter is accumulated. As a result, reservoirs need desilting after a while. Then a problem arises how to manage the sludge removed from the reservoir bottom. The chemical properties of the bottom sludge, and particularly the content of heavy metals, decide whether it will be possible to use the sludge and in what way. The chemical properties of the bottom sludge depend, to a far extent, on the character of the reservoir basin, the level of its urbanisation, and also on the climatic conditions. The paper presents the results of investigations into the content of heavy metals in the bottom sediments in the Suchedniów water reservoir. This water body is characterised by small mean depth of 1.05 m and mean annual flow across the dam profile of 0.63 m3·s–1. Forests dominate in of the reservoir basin covering 45% of its area, arable land constitutes 18%, and the percentage of built-up area does not exceed 5%. In recent years (2009-2011), the water reservoir has become much silted because of storing large soil masses near the local watercourses during the construction of S-7 expressway. The amount of stored soil is estimated at 7.8 thousand m3. For investigations, nine bottom sediments samples were collected, in which the content of the following heavy metals: Pb, Cr, Cd, Cu, Ni, Zn, Fe, Mn was determined. Quasi-undisturbed sludge was taken into transparent cylinders with Eijkelkamp sampler, which made it possible to conduct analysis in sediment layers 20 cm in height. In order to evaluate the sediment pollution with heavy metals, the geoaccumulation index, the pollution coefficient and level were calculated. On the basis of admissible chemical soil pollution tables, the possibility of the sludge use in agriculture after extracting it from the reservoir bowl was assessed.
Źródło:
Proceedings of ECOpole; 2013, 7, 1; 287-294
1898-617X
2084-4557
Pojawia się w:
Proceedings of ECOpole
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Textural features of the beach sediments of Wast Water Lake, Northwest England
Autorzy:
Bala, Emilia
Powiązania:
https://bibliotekanauki.pl/articles/1035925.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
English Lake District
beach sediments
granulometric analysis
pebble shape analysis
littoral zone
Wast Water
Opis:
This study is dedicated to Wast Water Lake (Northwest England, Great Britain) and the character of its beach sediments. The aim of the study is to identify the textural features of the lake’s beach sediments based on two methods. The first is a granulometric analysis and the second a pebble shape analysis according to Zingg (1935) and Sneed & Folk (1958). Both analyses were carried out for all of the lake’s accessible beaches and the cliffs adjacent to them. The transport and deposition history of the examined sediments was identified through field research and laboratory analysis. The results show that the textural features of the sediments at Wast Water are more often typical of a fluvial environment, rather than having been changed by lacustrine water movements.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2016, 20, 2; 46-53
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new Eemian Interglacial to Early Vistulian site at Łanięta, central Poland
Autorzy:
Balwierz, Z.
Roman, M.
Powiązania:
https://bibliotekanauki.pl/articles/2059929.pdf
Data publikacji:
2002
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Central Poland
Eemian Interglacial
Early Vistulian
lake sediments
palynostratigraphy
Opis:
The Łanięta site with fossil lake deposits is situated just in front of the maximum extent of Vistulian Glaciation ice. Palynological analysis shows that lake accumulation lasted through the Eemian Interglacial and almost the whole Early Vistulian, the longest record of this time interval in this part of Poland. Two warm interstadial-rank oscillations (Brörup and Odderade) and two stadials have been distinguished during the Early Vistulian. The older of these is correlated with the Herning Stadial while younger one equates with the Rederstal Stadial of the German succession.
Źródło:
Geological Quarterly; 2002, 46, 2; 207-218
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 381

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