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    Tytuł:
    Adsorption method of purification of stocks from chromium(III) ions by bentonite clays
    Autorzy:
    Soloviy, Christina
    Malovanyy, Myroslav
    Palamarchuk, Olga
    Trach, Iryna
    Petruk, Halyna
    Sakalova, Halyna
    Vasylinych, Tamara
    Vronska, Nataliya
    Powiązania:
    https://bibliotekanauki.pl/articles/1844378.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    adsorption
    bentonite
    chromium ions
    environmental safety
    natural clay sorbents
    wastewater purification
    Opis:
    The process of sorption of chromium(III) ions with a stationary sorbent layer of bentonite clays was investigated. The main advantages of using bentonites in water purification technologies are described: powerful geological reserves, cheap process of rock extraction, easy preparation for transportation and use, possibility of using waste sorbents in other technologies that is why there is no need in costly regeneration. The influence of various factors (process duration, an adsorbent layer) on the degree of wastewater purification from chromium ions, the effect of pumping speed on the dynamic capacity of the sorbent was studied and the effective volume was determined. The adsorption efficacy increases with the increase of the adsorbent layer, what can be explained by the development of the active sorption surface. As the initial concentration of chromium ions increases, the time of appearance of the first traces of the contaminant at the exit of the column increases, as well as the total time to channeling. The results of the studies indicate a higher adsorption capacity of modified bentonite with respect to Cr3+ ions compared to its natural formula. The cleaning efficacy of the solution with a concentration of chromium ions of 0.5 g∙dm–3 is increased by 5% when using 15 g of modified bentonite and 6,5% in the case one uses 20 g compared to the natural form.
    Źródło:
    Journal of Water and Land Development; 2021, 48; 99-104
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Treatment of Effluents from Ions of Heavy Metals as Display of Environmentally Responsible Activity of Modern Businessman
    Autorzy:
    Malovanyy, Myroslav
    Sakalova, Halyna
    Vasylinycz, Tamara
    Palamarchuk, Olha
    Semchuk, Jaroslav
    Powiązania:
    https://bibliotekanauki.pl/articles/123985.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    ecological safety
    natural clay sorbents
    adsorption
    sedimentation
    regeneration
    ions of heavy metals
    Opis:
    This work is dedicated to the development of scientific technologies of sewage water clarification of different industrial enterprises from chrome and nickel ions through adsorption by bentonite from Cherkasy field under dynamic conditions. The perspective and efficiency of application of bentonite clays for treatment of sewage water are confirmed by their advantages over other sorbents, that is: they win in accessibility, cost, and possibility of regeneration and multiple usages. The studies proved the expediency of bentonite clays usage for treatment of sewage water from chrome (III), zinc (ІІ) and nickel (II) ions. The static activities were determined and isotherms of adsorption of nickel, zinc and chrome ions were built. Deposition by gravity was chosen as the most optimal method reset of spend sorbent. Dosage of flocculants allows accelerating the process and increasing the degree of deposition. The basic parameters of the precipitation process of the used sorbent were established. The technological schemes of drain water purification from heavy metal ions contamination were developed; in addition to the following sedimentation and regeneration of sorbents.
    Źródło:
    Journal of Ecological Engineering; 2019, 20, 4; 167-176
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Research on the Ammonium Concentrations in City Stocks and Further Sedimentation of Ion-Exchange Concentrate
    Autorzy:
    Malovanyy, Myroslav
    Sakalova, Halyna
    Vasylinych, Tamara
    Kryklyvyi, Rostyslav
    Powiązania:
    https://bibliotekanauki.pl/articles/124943.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    environmental security
    natural clay sorbents
    adsorption
    ion exchange
    ammonium orthophosphate hexahydrate
    struvite
    thermal analysis
    Opis:
    In this work, the exchange capacity and the selectivity of different ion-exchange products regarding the ammonium ions in treatment processes were measured; the regenerative preparation compounds influence on efficiency of conduction of ion-exchange products regeneration was determined. The adsorption processes were adapted to the known technological schemes of sewage and polluted surface water treatment that was polluted with ammonium ions. There were measured the technological aspects of water treatment by using adsorption on natural dispersed sorbents. The technological schemes of drain water treatment from ammonium ions were developed. The method of simultaneous removal of highly concentrated nitrogen and phosphorus was analyzed by physical and chemical precipitation, forming struvite, a by-product of magnesium ammonium orthophosphate hexahydrate. The analyses were conducted at various molar ratios of magnesium and phosphate ions and at various pH values. The comparative thermal analysis of chemical precipitation products and pure struvite was performed. The optimal conditions were identified to experience the maximum efficiency of simultaneous removal of ammonium nitrogen and phosphate ions from wastewater, forming MgNH4PO4·6H2O.
    Źródło:
    Journal of Ecological Engineering; 2019, 20, 1; 158-164
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enhancing adsorption capacity of clay and application in dye removal from waste water
    Autorzy:
    Ogunmodede, O. T.
    Adebayo, O. L
    Ojo, A. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/412039.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    snail shell
    methylene blue
    natural clay
    langmuir
    freundlich
    temkin
    Halsey and Harkins-Jura isotherm equations
    Opis:
    Natural clay has been considered as a potential absorbent for removing pollutants from water and waste water. Nonetheless, the effective application of clay for water treatment is limited due to small surface area and presence of net negative surface charge, leading to it low adsorption capacity. The absorption capacity was boosted via intercalation of CaO derived from snail shell (SS). The methylene blue sorption potential, PZC, and the surface area of unmodified clay sample were substantially enhanced by the intercalation process. The process of sorption of MB from solution was analyzed using five different isotherm models (Langmuir, Freundlich, Temkin, Harkins-Jura, and Halsey isotherm equations). The value of the Langmuir monolayer sorption capacity qm (mg/g) increased from 50.12 to 88.71, PZC values increased from 4.50 to 7.40, and the surface area (m2/g) value increased from 27 m2/g to 123 m2/g after the intercalation process. The experimental data were fitted into two kinetic models: Lagergren pseudo-first order and the chemisorptions pseudo-second order. It was observed that chemisorptions pseudo-second order kinetic model described the sorption process with high coefficients of determination (r2) better than pseudo first other kinetic models. The modification caused no change in the clay surficial microstructure but increased the lattice spacing of the clay framework.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 20, 1; 35-51
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minimization of phenol by natural occurrence adsorbent
    Autorzy:
    Joshi, J.
    Sahu, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/10823.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    alga
    clay
    phenol
    natural adsorbent
    effluent adsorbent
    adsorption
    environment pollution
    Opis:
    Phenol and chlorophenols are long-lived pollutants frequently found in industrial effluents. Phenols are widely used for the commercial production of a wide variety of resins including phenolic resins, epoxy resins and adhesives, and polyamide for various applications. Adsorption process has been proven one of the best water treatment technologies around the world and the removal of diverse types of pollutants from water. However, widespread use of commercial adsorbent is sometimes restricted due to its higher costs. Attempts have been made to develop inexpensive adsorbents utilizing for the reduction of phenol from water. Four types of adsorbent clay, algae, moringa oleifera and rice husk has been used. Among all rice husk shown 97 % of phenol adsorption at 1mm particle size, pH 4, 3 g/l dosing and 150min contact time.
    Źródło:
    International Letters of Natural Sciences; 2014, 11, 1
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Shrinkage properties of three clay materials at different temperatures
    Autorzy:
    Wysocka, A.
    Stepniewski, W.
    Horn, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/26553.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    Proctor test
    clay
    temperature
    natural environment
    shrinkage potential
    waste deposit
    loam
    landfill capping
    Źródło:
    International Agrophysics; 2006, 20, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improvement of the Mechanical Behavior of Composite Materials with Different Binders Based on Local Plant Fibers Alfa and Diss
    Autorzy:
    Belkhir, Zohra
    Merzoud, Mouloud
    Powiązania:
    https://bibliotekanauki.pl/articles/2051547.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    composite materials
    mechanical properties
    natural fibers
    Alfa
    Diss
    cement
    clay
    materiały kompozytowe
    właściwości mechaniczne
    włókna naturalne
    glina
    Opis:
    Concerned about the environmental and economic impact, composite materials are increasingly used in the construction sector. Indeed, the use of plant fibers as reinforcement in construction materials have been the subject of several researches in recent years; the main motivation is the weight gain combined with high mechanical characteristics. The objective of this research concerns the study of the physicomechanical properties of composite materials with cement and clay matrices reinforced with Alfa and Diss fibers with dimensions ranging from 2 to 8 cm. This involves evaluating the performance of these materials according to the formulation, for a volume ratio (Alfa or Diss / Matrix fibers equal to 4), using dry fibers and pre-wetted fibers. The study of the mechanical properties showed a drop of the performance for both compression and bending strength compared to the reference material without adding fibers (cement or clay paste). It should be noted that the best mechanical performance is obtained for the case of composites materials with cementitious matrix with pre-wetted fibers. On the other hand, in the case of composites with clayey matrices, pre-wetting does not improve the mechanical characteristics. It is also noted that the best dimensions of fibers which improve the mechanical characteristics in bending are generally 6 cm for composites with a clay matrix and between 2 and 4 cm for cementitious composites. In all cases, the fibers in composite materials with cement or clay matrix create a bridging effect, making it possible to limit the progression of cracks during loading. This phenomenon gives to the various composite materials a ductile behavior.
    Źródło:
    Civil and Environmental Engineering Reports; 2021, 31, 4; 130-147
    2080-5187
    2450-8594
    Pojawia się w:
    Civil and Environmental Engineering Reports
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal renovation of buildings with the use of straw - European experience
    Termorenowacja budynków z użyciem słomy - doświadczenia europejskie
    Autorzy:
    Golański, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/396400.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    natural building materials
    thermorenovation
    ecological homes
    straw-clay walls
    naturalne materiały budowlane
    termorenowacja
    domy ekologiczne
    budownictwo z gliny
    budownictwo ze słomy
    Opis:
    The selection of building materials to a huge extent shapes building impact on the environment. In the era of widespread awareness of health problems arising from toxicity of chemical substances, healthy and safe materials of organic origin are even more important. The work discusses examples of the use of straw-bales in thermal retrofitting of buildings located in Austria, Czech Republic and Hungary. The experience of the practical applications of this material in renovations of buildings located in similar climatic conditions indicate that these solutions can be used successfully in Poland. The prevalence of this technology can make a significant contribution to reduction of gaseous emissions, waste, as well as the emission of noise, vibration radiation.
    Wybór materiałów budowlanych w olbrzymim stopniu kształtuje wpływ budynku na środowisko naturalne i na zdrowie użytkowników. Praca omawia przykłady technologii straw-bale do termorenowacji istniejących budynków zlokalizowanych w Austrii, Czachach i na Węgrzech. Doświadczenia praktycznych zastosowań naturalnych materiałów w docieplaniu budynków zlokalizowanych w podobnych warunkach klimatycznych wskazują, że rozwiązania te z powodzeniem można zastosować w Polsce. Rozpowszechnienie tej technologii może w znaczący sposób przyczynić się do redukcji emisji zanieczyszczeń gazowych i odpadów, a także emisji hałasu, wibracji i promieniowania.
    Źródło:
    Civil and Environmental Engineering Reports; 2016, No. 23(4); 61-68
    2080-5187
    2450-8594
    Pojawia się w:
    Civil and Environmental Engineering Reports
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effectiveness of wastewater post-treatment in filter columns with the use of mineral materials
    Autorzy:
    Gubernat, Sylwia
    Czarnota, Joanna
    Masłoń, Adam
    Koszelnik, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/2172364.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
    Tematy:
    wastewater treatment
    filtration
    natural materials
    lava rock
    lightweight sintered aggregate
    lightweight clay aggregates
    oczyszczanie ścieków
    filtracja
    skała lawowa
    lekkie kruszywo spiekane
    lekkie kruszywo gliniaste
    Opis:
    Based on the assumptions of the circular economy model and sustainable development, we are currently looking for natural and ecological materials in terms of wastewater treatment of pollutants. This article presents the research of three mineral materials - lava rock (LR), lightweight sintered aggregate (LSA) and lightweight clay aggregates (LCA) used as filling of filtration columns for the treatment of real wastewater. The filtration process was carried out under various hydraulic loads in two columns, one of which was additionally supported by the aeration process. The post-treated sewage was characterized by the following parameters: COD (chemical oxygen demand), TOC (total organic carbon), phosphate phosphorus (P-PO4 ), total nitrogen (TN) and total phosphorus (TP). Among the hydraulic loads applied, the most optimal loads were OhI = 0.25 m3/(m2·h). Certyd turned out to be the most effective with supporting filtration with the aeration process in removing organic compounds (reduction of 65.1% COD and 38.2% TOC at OhI ). Lava rock seems to be a promising material reactive in terms of removal of biogenic compounds such as nitrogen (efficiency 23.8% at OhI ) and phosphorus (64.2% reduction of TP at OhI ) and organic compounds (21.4% reduction of TOC at OhI in conditions without aeration). LCA shows the best efficiency in sorption of phosphorus compounds (41.6% reduction of TP at OhI ) and organic compounds (21.4% TOC reduction at OhI under non-aerated conditions).
    Źródło:
    Czasopismo Inżynierii Lądowej, Środowiska i Architektury; 2020, 37, 67; 47--58
    2300-5130
    2300-8903
    Pojawia się w:
    Czasopismo Inżynierii Lądowej, Środowiska i Architektury
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Budownictwo z gliny i słomy- wstępna ocena wybranych aspektów trwałości
    Straw-clay construction – preliminary assessment of selected aspects of sistainability
    Autorzy:
    Backiel-Brzozowska, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/400088.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    naturalne materiały budowlane
    domy ekologiczne
    budownictwo z gliny
    budownictwo ze słomy
    mrozoodporność
    odporność na wnikanie wody
    natural building materials
    ecological homes
    straw-clay walls
    frost resistance
    water penetration resistance
    Opis:
    Celem pracy jest wskazanie możliwości zastosowania tradycyjnych, ekologicznych materiałów budowlanych – gliny i słomy – do budowy współczesnych jednorodzinnych budynków mieszkaniowych. Przedstawiono genezę budownictwa naturalnego z gliny i słomy. Wyjaśniono podstawowe technologie konstruowania ścian oraz przedstawiono wybrane parametry techniczne przegród wykonywanych w technologii straw-bale. Następnie zaprezentowano wyniki badań nad wybranymi aspektami trwałości przegród z gliny i słomy, przeprowadzone w ramach pracy inżynierskiej wykonanej pod nadzorem autorki niniejszej pracy. W badaniach wykorzystano dwa rodzaje próbek przygotowanych w technologii glinosłomobitki (z gliny ciężkiej z dodatkiem słomy) oraz w technologii straw-bale. Wykazano możliwość uzyskania dobrej mrozoodporności gliny z dodatkiem słomy oraz możliwość skutecznej poprawy odporności na wnikanie wody za pomocą łatwych do wykonania i tanich powłok malarskich.
    The aim of this work is to show the possibility of a return to the traditional construction of walls from clay and straw in contemporary building construction characterized by high functional requirements. The introductory part summarizes the roots of natural building with clay and straw. It explains the basic technologies of building with clay and presents selected technical parameters of partitions made in the technology of straw-bale. Then, the results of preliminary tests on selected aspects of the sustainability of partitions made of clay and straw, carried out within the framework of engineering work done under the supervision of the author of this work. The tests were performed under the two types of specimens prepared with different technologies - heavy clay with the addition of straw and straw-bale. It has been shown that it is possible to obtain a good frost resistance of clay with the addition of straw. Also the resistance of water penetration can be effectively improved with easy to implement and low-cost coatings.
    Źródło:
    Inżynieria Ekologiczna; 2014, 40; 208-216
    2081-139X
    2392-0629
    Pojawia się w:
    Inżynieria Ekologiczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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