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1. Adsorptive removal of organic pollutant methylene blue using polysaccharide-based composite hydrogels

Author:
Rajamanickam Sivakumar; Nae Yoon Lee
Source:
Chemosphere 2022 v.286 pp. 131890
ISSN:
0045-6535
Subject:
adsorption; aquatic environment; clay; hydrogels; hydrogen; hydrophobic bonding; magnetism; methylene blue; polysaccharides; surface area; toxicity; van der Waals forces; wastewater
Abstract:
... Methylene blue (MB) is categorized as an organic dye (OD) released as effluents after various industrial activities and is one of the most abundant pollutants in the aquatic environment. Significantly, because of its potential toxicity, removing MB from wastewater has been a matter of necessity in recent times. Numerous analytical techniques have been applied, among which polysaccharide-based comp ...
DOI:
10.1016/j.chemosphere.2021.131890

2. A comparative study of biopolymer adsorption on model anisotropic clay surfaces using quartz crystal microbalance with dissipation (QCM-D)

Author:
Nahid Molaei; Omar Bashir Wani; Erin R. Bobicki
Source:
Journal of colloid and interface science 2022 v.615 pp. 543-553
ISSN:
0021-9797
Subject:
adsorption; aluminum oxide; anisotropy; biopolymers; clay; comparative study; electrostatic interactions; flocculation; human health; hydrogen; kaolinite; lysozyme; magnesium hydroxide; pH; pectins; quartz crystal microbalance; serpentine; silica
Abstract:
... Mitigation of colloid clay particles is critical during flotation and flocculation processes in mineral processing. Most organic and inorganic mitigation reagents have negative impacts on the environment and human health; therefore, biologically derived substances have been attracting attention as alternative reagents. Given the anisotropic nature of clay surfaces, it is imperative to understand r ...
DOI:
10.1016/j.jcis.2022.01.180

3. A novel approach in revealing mechanisms and particular step predictors of pH dependent tartrazine catalytic degradation in presence of Oxone®

Author:
Marko G. Popadić; Sanja R. Marinović; Tihana M. Mudrinić; Aleksandra D. Milutinović-Nikolić; Predrag T. Banković; Ivana S. Đorđević; Goran V. Janjić
Source:
Chemosphere 2021 v.281 pp. 130806
ISSN:
0045-6535
Subject:
aluminum; clay; cobalt; cobalt oxide; diazo compounds; gas chromatography-mass spectrometry; hydrogen; pH; tartrazine
Abstract:
... The degradation of tartrazine in the presence of cobalt activated Oxone® (potassium peroxymonosulfate) was investigated at different initial pH values. Aluminum pillared clay had the role of a support for catalytically active cobalt oxide species. The degradation of tartrazine and the formation of a mixture of degradation products were monitored using the Ultraviolet–Visible (UV–Vis) spectroscopy ...
DOI:
10.1016/j.chemosphere.2021.130806

4. Application of Edible Montmorillonite Clays for the Adsorption and Detoxification of Microcystin

Author:
Wang Meichen; Rivenbark Kelly; Gong Joonho; Wright Fred A.; Phillips Timothy D.
Source:
ACS Applied Bio Materials pp. -
ISSN:
2576-6422
Subject:
Caenorhabditis elegans; Gibbs free energy; Hydra vulgaris; Lemna minor; activated carbon; adsorption; algae; arginine; bioavailability; body length; calcium; chlorophyll; clay; computer simulation; digestive tract; dose response; enthalpy; filtration; hydrogen; leucine; microcystins; montmorillonite; sodium; sorbents; sorption isotherms; stomach; surface area; toxicity
Abstract:
... Exposure to microcystins (MCs) in humans and animals commonly occurs through the consumption of drinking water and food contaminated with cyanobacteria. Although studies have focused on developing water filtration treatments for MCs using activated carbon, dietary sorbents to reduce the bioavailability of MCs from the stomach and intestines have not been reported. To address this need, edible calc ...
DOI:
10.1021/acsabm.1c00779
CHORUS:
10.1021/acsabm.1c00779

5. Co-pyrolysis of lignin and spent bleaching clay: Insight into the catalytic characteristic and hydrogen supply of spent bleaching clay

Author:
Zhen Wan; Shaoqing Wang; Zhihe Li; Weiming Yi; Andong Zhang; Yufeng Li; Peng Zhang
Source:
Journal of analytical and applied pyrolysis 2022 v.163 pp. 105491
ISSN:
0165-2370
Subject:
activation energy; clay; corn cobs; hydrogen; kinetics; lignin; pyrolysis; synergism; temperature; wastes
Abstract:
... This study aimed to clarify the catalytic characteristic and hydrogen supply of spent bleaching clay (SBC) in the pyrolysis of corncob lignin. The effects of lignin doping ratio (0%, 25%, 50%, 75%, and 100%) and pyrolysis temperature (450 ℃, 550 ℃, and 650 ℃) on pyrolysis products were evaluated. The results of the kinetic analysis showed that when the lignin doping ratio was 75%, the activation e ...
DOI:
10.1016/j.jaap.2022.105491

6. Combined determination analysis of surface properties evolution towards bentonite by pH treatments

Author:
Wei Du; Yajun Yang; Liang Hu; Bokun Chang; Gang Cao; Mubasher Nasir; Jialong Lv
Source:
Colloids and surfaces 2021 v.626 pp. 127067
ISSN:
0927-7757
Subject:
X-ray diffraction; aqueous solutions; bentonite; chemical bonding; clay; ecological restoration; electric field; evolution; hydrogen; ion exchange; ionic strength; pH; solvents; surface area; zeta potential
Abstract:
... Bentonite possesses multiple physicochemical properties because of a large number of charges on the surface. Understanding charges-related surface characteristics at various aqueous solution conditions is critical for bentonite application in various fields, including material modification and environmental restoration. In this study, the evolution of surface properties (surface potential, surface ...
DOI:
10.1016/j.colsurfa.2021.127067

7. Development of polyvinyl alcohol-based antioxidant nanocomposite films with nanokaolin impregnated with polyphenols from pomegranate peel extract

Author:
Vaishali Saroha; Hina Khan; Sharad Raghuvanshi; Dharm Dutt
Source:
Food packaging and shelf life 2022 v.32 pp. 100848
ISSN:
2214-2894
Subject:
adsorption; antioxidant activity; antioxidants; clay; color; hydrogen; kaolin; nanocomposites; polyphenols; pomegranates; shelf life; solvents; sorption isotherms; zeta potential
Abstract:
... This study aimed to evaluate the potential of polyphenol-modified kaolin as an active nanofiller in the preparation of polyvinyl alcohol-based nanocomposite film for the development of packaging materials.In the first part of the study, polyphenols present in the pomegranate peel were extracted, and their interaction with kaolin clay was investigated through the adsorption process by the UV–VIS me ...
DOI:
10.1016/j.fpsl.2022.100848

8. Effective adsorption of bisphenol A from aqueous solution over a novel mesoporous carbonized material based on spent bleaching earth

Author:
Dongjin Wan; Yao Chen; Yahui Shi; Yongde Liu; Shuhu Xiao
Source:
Environmental science and pollution research 2021 v.28 no.29 pp. 40035-40048
ISSN:
0944-1344
Subject:
activated carbon; adsorbents; adsorption; aqueous solutions; bisphenol A; clay; desorption; electrostatic interactions; endothermy; hydrofluoric acid; hydrogen; hydrophobic bonding; industrial wastes; kinetics; models; pH; pollution; porous media; pyrolysis; research; sorption isotherms; surface area; temperature
Abstract:
... In this study, the novel mesoporous carbonized material (HSBE/C) was prepared from clay/carbon composite (SBE/C) treated with hydrofluoric acid (HF) for the first time, and was employed to efficiently adsorb bisphenol A (BPA) in water. Specifically, SBE/C was derived from the pyrolysis of spent bleaching earth (SBE), an industrial waste. HF removed SiO₂ from SBE/C and increased the specific surfac ...
DOI:
10.1007/s11356-021-13596-0

9. Gaseous and heterogeneous reactions on the mechanisms and kinetics of acrolein with ozone

Author:
Naixian Wang; Jianfei Sun; Bo Wei; Qiong Mei; Zexiu An; Fenghua Wei; Mingxue Li; Zhaoxu Qiu; Xiaofei Bo; Ju Xie; Jinhua Zhan; Maoxia He
Source:
Atmospheric environment 2021 v.254 pp. 118392
ISSN:
1352-2310
Subject:
acrolein; adsorption; clay; climate change; energy; environment; fuel combustion; hydrogen; hydrogen bonding; isomerization; linear models; oxygen; ozonation; ozone; reaction mechanisms; silica; temperature; troposphere
Abstract:
... In this paper, the gas-phase and heterogeneous reactions of acrolein with ozone were studied comprehensively and deeply. Acrolein is one of the simplest unsaturated aldehydes found widely in the fuel combustion and industrial emissions. Mineral particles produced by frequent sandstorms have important effects on the tropospheric chemistry and the climate change. The content of silica in clay minera ...
DOI:
10.1016/j.atmosenv.2021.118392

10. Investigation of the inhibition mechanism of polymer/nano-silica composite as shale inhibitor in water-based drilling fluids

Author:
Fei Liu; Chengxiang Zhang; Xiaqing Li; Zhaoxiang Zhang; Xuewu Wang; Xiaodong Dai; Mengyue Zhou; Qingxue Liu
Source:
Colloids and surfaces 2022 v.636 pp. 128099
ISSN:
0927-7757
Subject:
X-ray diffraction; adsorption; bentonite; clay; filter cake; hydrogen; oils; polymers; potassium chloride; shale; temperature; thermogravimetry; zeta potential
Abstract:
... Wellbore instability caused by shale hydration and swelling is the critical issue in the drilling process of oil and gas wells. In this study, the nano-silica/cationic polymer composite (NS-DD) was synthesized and evaluated as novel shale inhibitor in water-based drilling fluids (WDFs). The inhibition performance of NS-DD was carried out and compared with the conventional inhibitor potassium chlor ...
DOI:
10.1016/j.colsurfa.2021.128099

11. Manipulate the nano-structure of layered double hydroxides via calcination for enhancing immobilization of anionic dyes on collagen fibers

Author:
Na Yang; Jianzhong Ma; Jiabo Shi; Xiaoyan Yang; Jun Lu
Source:
Journal of colloid and interface science 2022 v.610 pp. 182-193
ISSN:
0021-9797
Subject:
adsorption; clay; collagen; dyes; hydrogen; leather; manufacturing; nanosheets; oxygen; porosity; rehydration; sorption isotherms; surface area; thermal stability
Abstract:
... In this work, we present an effective approach for promoting the immobilization of anionic dyes on the collagen fibers of the leather matrix via introducing layered double oxide (LDO), which is obtained by calcining layered double hydroxides (LDH), inspired by incorporating their memory effect and charge effect. The results indicate that the calcination increases specific surface area, oxygen vaca ...
DOI:
10.1016/j.jcis.2021.12.030

12. Organic geochemical characterization of Early-Mid-Holocene swamp deposits near the Neolithic settlement in Yenikapı-Istanbul: Assessment of environmental variability and anthropogenic impacts

Author:
Mehmet Namık Yalçın; Heinz Wilkes; Birgit Plessen
Source:
Holocene 2021 v.31 no.11-12 pp. 1690-1704
ISSN:
1477-0911
Subject:
Holocene epoch; alkanes; anthropogenic activities; archaeology; clay; hydrogen; hydrology; models; organic matter; sedimentation rate; sterols; swamps
Abstract:
... During the archaeological excavations in the Byzantine Theodosian harbor (Istanbul) a Holocene dark gray to black clay sequence was uncovered. This clay unit was deposited under anoxic conditions in a small swamp. Both wooden artifacts from the Neolithic period, but also dispersed organic matter were perfectly preserved within this sequence. The aim of this study was the assessment of environmenta ...
DOI:
10.1177/09596836211033197

13. Palaeoenvironmental and tectonic controls on organic matter enrichment in the Middle Jurassic Dameigou Formation (Qaidam Basin, North China)

Author:
Shiming Liu; Bangjun Liu; Shuheng Tang; Cunliang Zhao; Furong Tan; Zhaodong Xi; Fangpeng Du
Source:
Palaeogeography, palaeoclimatology, palaeoecology 2022 v.585 pp. 110747
ISSN:
0031-0182
Subject:
Middle Jurassic epoch; basins; calcite; clay; climate; dolomite; evolution; geochemistry; hydrogen; lithology; models; oil shale; oils; palaeogeography; paleoclimatology; paleoecology; plagioclase; pyrite; quartz; siderite; subsidence; tectonics; total organic carbon; China
Abstract:
... Lacustrine organic-rich shales are well developed in the Dameigou Formation within the Yuka Depression of the Qaidam Basin. These fine-grained sediments have been proven to have good hydrocarbon generation potential; therefore, understanding the sedimentary palaeoenvironment of these shales and organic matter enrichment mechanism is essential to increase prospects for shale oil and gas resources. ...
DOI:
10.1016/j.palaeo.2021.110747

14. Prediction of bacterial functional diversity in clay microcosms

Author:
Alexander A. Grigoryan; Daphne R. Jalique; Simcha Stroes-Gascoyne; Gideon M. Wolfaardt; Peter G. Keech; Darren R. Korber
Source:
Heliyon 2021 v.7 no.10 pp. e08131
ISSN:
2405-8440
Subject:
Alcaligenaceae; Bacillaceae; Chloroflexi; Clostridiaceae; Desulfobacteraceae; Desulfobulbaceae; Enterobacteriaceae; Hydrogenophilaceae; Peptococcaceae; Peptostreptococcaceae; Planococcaceae; Pseudomonadaceae; Rhodospirillaceae; Veillonellaceae; acetogens; ambient temperature; bacterial communities; bentonite; biomarkers; clay; corrosion; dormancy; functional diversity; genes; hydrogen; metabolites; microbial activity; nuclear fuels; prediction; prokaryotic cells; sulfates; sulfides; sulfur; water activity; Wyoming
Abstract:
... Microorganisms in clay barriers could affect the long-term performance of waste containers in future deep geological repositories (DGR) for used nuclear fuel through production of corrosive metabolites (e.g., sulfide), which is why clay materials are highly compacted: to reduce both physical space and access to water for microorganisms to grow. However, the highly compacted nature of clays and the ...
DOI:
10.1016/j.heliyon.2021.e08131

15. Simultaneous adsorption of chromium and acidic dye from leather tannery model wastewater using a novel modified nanoclay

Author:
M. Golghasemi Sorkhabi; H. Aghdasinia; F. Notghi Oskui; A. Karimi; M. Golizadeh
Source:
Environmental earth sciences 2021 v.80 no.24 pp. 813
ISSN:
1866-6280
Subject:
Fourier transform infrared spectroscopy; X-radiation; X-ray diffraction; adsorbents; adsorption; carbon; chlorides; chromium; clay; dyes; empirical models; fluorescence; hydrogen; leather; nanoclays; nitrogen; pH; response surface methodology; sorption isotherms; sulfur; surfactants; tanneries; temperature; wastewater
Abstract:
... Simultaneous removal of [Formula: see text] and acidic dye from model tannery wastewater was investigated using local nano-clay modified by 3-chloro-2-hydroxypropyltrimethylammonium chloride surfactant. X-ray fluorescence, Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, carbon, hydrogen, nitrogen and sulfur analysis, Brunauer–Emmet–Teller analysis and pH o ...
DOI:
10.1007/s12665-021-10120-y

16. Sources and fate of organic matter in a hypersaline lagoon: A study based on stable isotopes from the Pulicat lagoon, India

Author:
Santrupta Samantaray; Prasanta Sanyal
Source:
Science of the total environment 2022 v.807 pp. 150617
ISSN:
0048-9697
Subject:
ammonium; carbon; cation exchange; cellulose; clay; environment; evaporation; hydrogen; hypersalinity; monsoon season; nitrogen; organic matter; osmotic stress; oxygen isotopes; primary productivity; salt stress; seagrasses; sewage; wind; India
Abstract:
... Stable carbon (δ¹³C) and nitrogen (δ¹⁵N) isotopes of organic matter (OM) in bed sediments and suspended solids are thoroughly investigated in the Pulicat lagoon, India, in pre-South West (SW) monsoon (June 2018) and post-North East (NE) monsoon (March 2019) to understand the response of OM in salt stress conditions. A near absence of an external supply of water and intense evaporation, as suggeste ...
DOI:
10.1016/j.scitotenv.2021.150617

17. Study of the water sorption and barrier performances of potato starch nano-biocomposites based on halloysite nanotubes

Author:
Nadège Follain; Jiawei Ren; Eric Pollet; Luc Avérous
Source:
Carbohydrate polymers 2022 v.277 pp. 118805
ISSN:
0144-8617
Subject:
clay; diffusivity; glycerol; halloysite; hydrogen; nanoclays; nanocomposites; nanotubes; plasticizers; potato starch; sorbitol; sorption; starch; water vapor
Abstract:
... The barrier performances, in terms of water vapor sorption properties, gas and water barrier performances were analyzed on different starch-based nano-biocomposites. These multiphase systems were elaborated by melt blending starch and halloysite nanotubes at different contents with different plasticizers (glycerol, sorbitol and a mix of both polyols). The influence of the composition was investiga ...
DOI:
10.1016/j.carbpol.2021.118805

18. Unravelling the process of petroleum hydrocarbon biodegradation in different filter materials of constructed wetlands by stable isotope fractionation and labelling studies

Author:
Andrea Watzinger; Melanie Hager; Thomas Reichenauer; Gerhard Soja; Paul Kinner
Source:
Biodegradation 2021 v.32 no.3 pp. 343-359
ISSN:
0923-9820
Subject:
adsorption; biochar; biodegradation; carbon; carbon dioxide; clay; constructed wetlands; decane; desorption; groundwater; hexadecane; hydrogen; isotope fractionation; mass transfer; microbial biomass; microbial communities; mineralization; petroleum; remediation; sand; sand filters; stable isotopes
Abstract:
... Maintaining and supporting complete biodegradation during remediation of petroleum hydrocarbon contaminated groundwater in constructed wetlands is vital for the final destruction and removal of contaminants. We aimed to compare and gain insight into biodegradation and explore possible limitations in different filter materials (sand, sand amended with biochar, expanded clay). These filters were col ...
DOI:
10.1007/s10532-021-09942-1

19. Water–dispersible magnetite montmorillonite encapsulated cellulose beads for fluoride removal and their kinetics and mechanism

Author:
Sapna Nehra; Ankita Dhillon; Rekha Sharma; Manjula Nair; Dinesh Kumar
Source:
Environmental nanotechnology, monitoring & management 2022 v.18 pp. 100690
ISSN:
2215-1532
Subject:
administrative management; adsorbents; adsorption; cellulose; clay; electrostatic interactions; encapsulation; endothermy; fluorides; hydrogen; ion exchange; iron; magnetic fields; magnetite; montmorillonite; surface area; thermodynamics; toxicity
Abstract:
... Water is indispensable to life. The presence of toxic fluoride in water is a problem of grave concern. To address this problem, we have synthesized a water-dispersible magnetite low-cost clay montmorillonite impregnated with cellulose beads (MMTCB) by the dropping technique. Excellent surface chemistry, ease of separation, good swelling behaviour, and smooth operationality contribute to the novelt ...
DOI:
10.1016/j.enmm.2022.100690

20. Adsorption Capacity of Smectite Clay and Its Thermal and Chemical Modification for Two Anionic Dyes: Comparative Study

Author:
Magdalena Pajak
Source:
Water, air, and soil pollution 2021 v.232 no.2 pp. 83
ISSN:
0049-6979
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; air; ambient temperature; clay; comparative study; dyes; energy-dispersive X-ray analysis; hydrogen; smectite; soil pollution; sorption isotherms; water
Abstract:
... The present research evaluates the influence of modification of smectite clay (BC) on its adsorption capacity of anionic dyes from aqueous solutions. Thermal (BC 250), acidic (BC H₂SO₄), and alkaline (BC NaOH) modification of clay was carried out. The clays were characterized by X-ray powder diffraction, energy-dispersive X-ray spectroscopy, and Fourier transform infrared spectroscopy. Adsorption ...
DOI:
10.1007/s11270-021-05032-3

21. Adsorption of Phosphate Ions on the Basal and Edge Surfaces of Kaolinite in Low Salt Aqueous Solutions Using Molecular Dynamics Simulations

Author:
Karien I. García; Gonzalo R. Quezada; José L. Arumí; Roberto Urrutia; Pedro G. Toledo
Source:
Journal of physical chemistry 2021 v.125 no.38 pp. 21179-21190
ISSN:
1932-7455
Subject:
adsorption; clay; gibbsite; hydrogen; hydrophilicity; hydrophobicity; kaolinite; molecular dynamics; pH; phosphates; salt concentration; sodium
Abstract:
... Clay applications for phosphate export are not widespread, in part because the mechanisms of nutrient adsorption on clay particles are not fully understood. Molecular dynamics simulations are used to study the adsorption of two species of phosphates that prevail at neutral pH, the dihydrogen phosphate ion H₂PO₄– and the hydrogen phosphate ion HPO₄²– in a 1:1 ratio, on the three principal planes of ...
DOI:
10.1021/acs.jpcc.1c05995

22. Assessing Diffusion Relaxation of Interlayer Water in Clay Minerals Using a Minimalist Three-Parameter Model

Author:
Martin H. Petersen; Nathan Vernet; Will P. Gates; Félix J. Villacorta; Seiko Ohira-Kawamura; Yukinobu Kawakita; Masatoshi Arai; Gerald Kneller; Heloisa N. Bordallo
Source:
Journal of physical chemistry 2021 v.125 no.27 pp. 15085-15093
ISSN:
1932-7455
Subject:
cations; clay; hydrogen; hydrogen bonding; molecular dynamics; montmorillonite; neutrons; temperature; water uptake
Abstract:
... Using a minimal model approach for interpreting the intermediate scattering function, F(Q, t), to analyze quasi-elastic neutron scattering (QENS) data from interlayer water as a function of temperature in the 2D-layered clay minerals montmorillonite (Mt) and hectorite (Ht) a clear difference in behavior was observed. This was related to the polarization effect induced on the water molecules by bot ...
DOI:
10.1021/acs.jpcc.1c04322

23. Characterization and adsorption applications of composite biochars of clay minerals and biomass

Author:
Lihui Gao; Jillian L. Goldfarb
Source:
Environmental science and pollution research 2021 v.28 no.32 pp. 44277-44287
ISSN:
0944-1344
Subject:
adsorbents; adsorption; biochar; biomass; cellulose; clay; hydrogen; kaolinite; methylene blue; models; montmorillonite; pollution; porosity; proximate composition; research; sand; surface area
Abstract:
... Composite mineral-biochars of a homogeneous biomass (cellulose) and heterogeneous biomass (oak leaves) were fabricated with either 5 wt% or 10 wt% minerals (montmorillonite (MMT), kaolinite, and sand) and then pyrolyzed at 600 °C for 60 min. Characterizations including proximate analysis, ultimate analysis, surface area and porosity, morphology, and surface chemistry confirmed that minerals were p ...
DOI:
10.1007/s11356-021-13858-x

24. Determination of Clay Bound Water in Shales from NMR Signals: The Fractal Theory

Author:
Kouqi Liu; Zhijun Jin; Lianbo Zeng; Yujie Yuan; Mehdi Ostadhassan
Source:
Energy & fuels 2021 v.35 no.22 pp. 18406-18413
ISSN:
1520-5029
Subject:
clay; energy; fractal dimensions; heat treatment; hydrogen; nuclear magnetic resonance spectroscopy; shale; temperature
Abstract:
... Clay bound water (CBW) is an essential parameter to calculate not only water saturation but also other petrophysical parameters in shaly formations. Hence, in order to accurately obtain the information pertaining the CBW, nuclear magnetic resonance (NMR) is commonly used, which is sensitive to hydrogen that is adsorbed by clay minerals. Knowing that temperature can remove CBW, we combined thermal ...
DOI:
10.1021/acs.energyfuels.1c02285

25. Enhanced adsorption of per- and polyfluoroalkyl substances (PFAS) by edible, nutrient-amended montmorillonite clays

Author:
Meichen Wang; Asuka A. Orr; Joseph M. Jakubowski; Kelsea E. Bird; Colleen M. Casey; Sara E. Hearon; Phanourios Tamamis; Timothy D. Phillips
Source:
Water research 2021 v.188 pp. 116534
ISSN:
0043-1354
Subject:
Hydra vulgaris; adsorption; bioavailability; carbon; carnitine; choline; clay; desorption; enthalpy; hydrogen; hydrophobicity; intestines; molecular dynamics; montmorillonite; research; sorbents; sorption isotherms; stomach; therapeutics; water
Abstract:
... Humans and animals are frequently exposed to PFAS (per- and polyfluoroalkyl substances) through drinking water and food; however, no therapeutic sorbent strategies have been developed to mitigate this problem. Montmorillonites amended with the common nutrients, carnitine and choline, were characterized for their ability to bind 4 representative PFAS (PFOA, PFOS, GenX, and PFBS). Adsorption/desorpt ...
DOI:
10.1016/j.watres.2020.116534
CHORUS:
10.1016/j.watres.2020.116534

26. Evaluation of Biological Control Agents and Conventional Products for Post-Harvest Application on Potato (Solanum tuberosum L.) to Manage Leak

Author:
Andrew K Hollingshead; Nora L. Olsen; Mike Thornton; Jeff Miller; David A. Schisler; Patricia J. Slininger
Source:
American journal of potato research 2020 v.97 no.5 pp. 477-488
ISSN:
1099-209X
Subject:
Pseudomonas fluorescens; Pseudomonas syringae; Pythium ultimum; Solanum tuberosum; azoxystrobin; biological control; biological control agents; clay; culture media; difenoconazole; fludioxonil; hydrogen; hydrogen peroxide; peracetic acid; phosphorous acid; potatoes; research and development
Abstract:
... Biological control agents applied post-harvest may provide an effective way to manage leak of potatoes by competing with Pythium ultimum. The objective of this paper was to test the efficacy of various biological control agents and conventional post-harvest fungicides to manage leak. Two studies were performed with a Pseudomonas fluorescens triculture including desiccation tolerant variants of str ...
DOI:
10.1007/s12230-020-09795-z

27. High-grade biofuel production from catalytic pyrolysis of waste clay oil using modified activated seaweed carbon-based catalyst

Author:
Chuan Yuan; Abd El-Fatah Abomohra; Shuang Wang; Qian Liu; Shuang Zhao; Bin Cao; Xun Hu; Fatma Marrakchi; Zhixia He; Yamin Hu
Source:
Journal of cleaner production 2021 v.313 pp. 127928
ISSN:
0959-6526
Subject:
aromatization; biochar; biofuels; catalysts; catalytic activity; clay; decarboxylation; fuel production; hydrogen; hydrogenation; liquids; macroalgae; oils; pyrolysis; surface area
Abstract:
... In the present study, seaweed char-based catalyst was used for pyrolysis of waste clay oil to obtain high-grade biofuels. First, the biochar was activated at different temperatures of 600, 700, and 800 °C (Y600, Y700, and Y800, respectively). The specific surface area of seaweed char prepared by activation at 800 °C reached the maximum value (1227.74 m²/g), which was a good catalyst carrier. Then ...
DOI:
10.1016/j.jclepro.2021.127928

28. Impact of turbidity, hydraulic retention time, and polarity reversal upon iron electrode based electrocoagulation pre-treatment of coal seam gas associated water

Author:
Syeda Nishat Ashraf; Jay Rajapakse; Les A. Dawes; Graeme J. Millar
Source:
Environmental technology & innovation 2021 v.23 pp. 101622
ISSN:
2352-1864
Subject:
boron; clay; coalbed methane; electricity; electrocoagulation; electrodes; energy use and consumption; environmental technology; hydrogen; iron; magnesium; steel; turbidity; water quality
Abstract:
... The applicability of iron (steel) electrodes in a continuous electrocoagulation (EC) process to treat coal seam gas (CSG) associated water comprising of a high level of turbidity (421 NTU) was studied. Key objectives were to understand the influence of turbidity upon water quality when hydraulic retention time (HRT) and polarity reversal time (PRT) were tested using a bench top EC unit. Extension ...
DOI:
10.1016/j.eti.2021.101622

29. Inhibition Impact of Amino Acids on Swelling Clays: An Experimental and COSMO-RS Simulation Evaluation

Author:
Ato Kwamena Quainoo; Berihun Mamo Negash; Cornelius B. Bavoh; Alamin Idris; Hazri B A Shahpin; Atta Dennis Yaw
Source:
Energy & fuels 2020 v.34 no.11 pp. 13985-14000
ISSN:
1520-5029
Subject:
clay; energy; hydrogen; imbibition; lysine; methionine; montmorillonite; regression analysis; shale gas; simulation models; stabilizers; surface area; toxicity; zeta potential
Abstract:
... The presence of swelling clays, namely, montmorillonite and illite-smectite mixed layer clays alike, significantly affects well stimulation processes, such as hydraulic fracturing. In this study, the inhibition potentials of three natural amino acids, namely, glycine, lysine monohydrochloride (lysine MHCl), and methionine, on the swelling properties of swelling clays were evaluated using laborator ...
DOI:
10.1021/acs.energyfuels.0c02766

30. Kaolinite/cashew gum bionanocomposite for doxazosin incorporation and its release

Author:
Maura C.C. Silva; Maria S.F. Santos; Roosevelt D.S. Bezerra; Edgar A. Araújo-Júnior; Josy A. Osajima; Maria R.M.C. Santos; Maria G. Fonseca; Edson C. Silva-Filho
Source:
International journal of biological macromolecules 2020 v.161 pp. 927-935
ISSN:
0141-8130
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; cashew gum; clay; drugs; hydrogen; kaolinite; nanocomposites; pH; solubility; temperature
Abstract:
... Incorporation of drugs in clay minerals has been widely proposed for the controlled-release or increased solubility of drugs. In this context, a bionanocomposite based on kaolinite and cashew gum (Kln/Gum) was synthesized and characterized by X-ray diffraction (XRD), thermal analysis (TG/DTA), and Fourier transform infrared spectroscopy (FTIR). The bionanocomposite was applied to the incorporation ...
DOI:
10.1016/j.ijbiomac.2020.06.062

31. LIBS and FTIR–ATR spectroscopy studies of mineral–organic associations in saline soil

Author:
Fei Ma; Changwen Du; Yiqiang Zhang; Xuebin Xu; Jianmin Zhou
Source:
Land degradation & development 2021 v.32 no.4 pp. 1786-1795
ISSN:
1085-3278
Subject:
atomic absorption spectrometry; clay; hydrogen; irrigation; land degradation; reflectance spectroscopy; saline soils; silicates; soil degradation; soil organic matter; China
Abstract:
... Direct characterization of the spatial distribution of elements and compound binding of salt–organic associations in soil is imperative for understanding the mechanisms of organic matter decomposition and nutrient release involved in soil degradation and development processes. However, traditional chemical methods would damage the chemical bonds in salt–organic associations, and modern spectroscop ...
DOI:
10.1002/ldr.3829

32. Multiple Factors Influence the Accumulation of Heavy Metals (Cu, Pb, Ni, Zn) in Forest Soils in the Vicinity of Roadways

Author:
Dawid Kupka; Mateusz Kania; Marcin Pietrzykowski; Adam Łukasik; Piotr Gruba
Source:
Water, air, and soil pollution 2021 v.232 no.5 pp. 194
ISSN:
0049-6979
Subject:
Abies alba; air; carbon; clay; copper; edge effects; forests; heavy metals; hydrogen; lead; nickel; nitrogen; organic horizons; roads; sodium; soil organic matter; soil pH; soil pollution; soil solution; stoichiometry; topsoil; traffic; water; zinc; Poland
Abstract:
... Intensified vehicular traffic causes increased heavy metal contamination of the environment. We investigated the heavy metal chemistry of soils located under silver fir stands in the vicinity of Poland’s S7 roadway. Three sampling sites were located in fir stands in central Poland. Fieldwork included soil sampling of the organic (O) horizon and mineral (A) topsoil. We analyzed the soil pH, carbon ...
DOI:
10.1007/s11270-021-05147-7

33. NMR Studies of the Dehydroxylation and Rehydroxylation (RHX) of Clays with Respect to the RHX Dating of Ceramic Materials

Author:
Marija Avramovska; Dieter Freude; Wilhelm Schwieger; Chen Song; Jörg Kärger; Jürgen Haase
Source:
Journal of physical chemistry 2021 v.125 no.47 pp. 26274-26283
ISSN:
1932-7455
Subject:
archaeology; ceramics; clay; desorption; hydrogen; nuclear magnetic resonance spectroscopy; temperature
Abstract:
... Monitoring the recombination of OH groups in a ceramic sample after firing, also known as rehydroxylation (RHX), was proposed as a way to determine the time elapsed since the firing of a ceramic material, thus providing archeologists with the only up-to-date known method for determining the age of fired ceramics directly. A nuclear magnetic resonance (NMR) study was performed in order to understan ...
DOI:
10.1021/acs.jpcc.1c08724

34. Nano-silica/polymer composite as filtrate reducer in water-based drilling fluids

Author:
Fei Liu; Hailei Yao; Qingxue Liu; Xuewu Wang; Xiaodong Dai; Mengyue Zhou; Ye Wang; Chengxiang Zhang; Daoxu Wang; Yongquan Deng
Source:
Colloids and surfaces 2021 v.627 pp. 127168
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; clay; filtrates; filtration; hydrogen; nuclear magnetic resonance spectroscopy; oils; particle size; particle size distribution; permeability; petroleum; polymers; silica; temperature; thermal degradation; thermogravimetry; zeta potential
Abstract:
... Wellbore instability and reservoir damage caused by filtrate of water-based drilling fluids (WDFs) invading the formation are extremely problematic issues in the process of oil excavation. Herein, we reported a novel polymer with core-shell structure based on modified silica nanoparticles as a filtrate reducer (NS-DA) in WDFs. Fourier transform infrared spectroscopy (FTIR) and proton nuclear magne ...
DOI:
10.1016/j.colsurfa.2021.127168

35. Novel Deep Eutectic Solvents for Stabilizing Clay and Inhibiting Shale Hydration

Author:
Jingyuan Ma; Shaocong Pang; Wei Zhou; Boru Xia; Yuxiu An
Source:
Energy & fuels 2021 v.35 no.9 pp. 7833-7843
ISSN:
1520-5029
Subject:
Fourier transform infrared spectroscopy; bentonite; choline chloride; clay; electrostatic interactions; energy; hydrogen; liquids; nuclear magnetic resonance spectroscopy; potassium chloride; shale; sodium; surface tension
Abstract:
... The hydration and swelling of shale caused by water in water-based drilling fluids is one of the most important problems that causes wellbore instability. The development of high-performance shale inhibitors is an important prerequisite for ensuring the drilling of shale formations. In this study, four deep eutectic solvents (DESs) based on choline chloride (urea-DES, Gly-DES, Oxa-DES, and Cit-DES ...
DOI:
10.1021/acs.energyfuels.1c00319

36. On glyphosate–kaolinite surface interactions. A molecular dynamic study

Author:
Edgar Galicia‐Andrés; Daniel Tunega; Martin H. Gerzabek; Chris Oostenbrink
Source:
European journal of soil science 2021 v.72 no.3 pp. 1231-1242
ISSN:
1351-0754
Subject:
Gibbs free energy; adsorption; clay; energy; glyphosate; hydrogen; kaolinite; quantum mechanics
Abstract:
... Glyphosate is an important and widely used herbicide, its environmental behaviour being of scientific and public interest. Computational models of clay minerals and their interactions with small organic molecules are valuable in studying adsorption processes at an atomistic resolution. We analysed the adsorption process of glyphosate on kaolinite, a clay mineral with a high abundance in several ty ...
DOI:
10.1111/ejss.12971

37. Organisation of clay nanoplatelets in a polyelectrolyte-based hydrogel

Author:
Claire Hotton; Juliette Sirieix-Plénet; Guylaine Ducouret; Thomas Bizien; Alexis Chennevière; Lionel Porcar; Laurent Michot; Natalie Malikova
Source:
Journal of colloid and interface science 2021 v.604 pp. 358-367
ISSN:
0021-9797
Subject:
calcium; clay; crosslinking; electrolytes; hydrogels; hydrogen; modulus of elasticity; montmorillonite; neutrons; small-angle X-ray scattering; smectite
Abstract:
... We investigate the organisation of clay nanoplatelets within a hydrogel based on modified ionenes, cationic polyelectrolytes forming physically crosslinked hydrogels induced by hydrogen bonding and π-π stacking. Combination of small angle X-ray and neutron scattering (SAXS, SANS) reveals the structure of the polyelectrolyte network as well as the organisation of the clay additives. The clay-free h ...
DOI:
10.1016/j.jcis.2021.07.010

38. Phytoremediation of Arsenic-Contaminated Soils Amended with Red Mud Combined with Phosphogypsum

Author:
Enio Tarso de Souza Costa; Guilherme Lopes; Geila Santos Carvalho; Henrique Gualberto Vilela Penha; Nilton Curi; Luiz Roberto Guimarães Guilherme
Source:
Water, air, and soil pollution 2021 v.232 no.10 pp. 417
ISSN:
0049-6979
Subject:
Quartzipsamments; Urochloa brizantha; air; arsenic; calcium; clay; clay soils; dry matter accumulation; electrical conductivity; hydrogen; limestone; organic matter; pH; phosphogypsum; phytoremediation; roots; sandy soils; sodium; soil pollution; sulfur; toxicity; water
Abstract:
... Several industrial by-products may be used as amendments to reduce arsenic availability in contaminated areas, hence contributing to phytoremediation processes. This study was conducted aiming to evaluate red mud (RM) and a mixture containing 75% of RM + 25% of phosphogypsum (PG) (hereafter, RMPG) as amendments in arsenic-contaminated soils presenting distinct properties, like clay and organic mat ...
DOI:
10.1007/s11270-021-05360-4

39. Reductive defluorination of Perfluorooctanesulfonic acid (PFOS) by hydrated electrons generated upon UV irradiation of 3-Indole-acetic-acid in 12-Aminolauric-Modified montmorillonite

Author:
Alex Kugler; Hailiang Dong; Chen Li; Cheng Gu; Charles E. Schaefer; Youn Jeong Choi; Danielle Tran; Morgan Spraul; Christopher P. Higgins
Source:
Water research 2021 v.200 pp. 117221
ISSN:
0043-1354
Subject:
adsorption; bicarbonates; chlorides; clay; fluorine; groundwater; hydrogen; montmorillonite; nanocomposites; pH; perfluorooctane sulfonic acid; polymers; research; ultraviolet radiation
Abstract:
... Per-and poly-fluoroalkyl substances (PFASs) are a class of persistent compounds that are resistant to degradation. Here we developed an effective method of degrading perfluorooctanesulfonate (PFOS) by hydrated electrons (eₐq⁻) that are generated from 3-indole-acetic-acid (IAA) upon UV irradiation. The method takes advantage of spatial proximity of IAA and PFOS by their co-sorption to an organic po ...
DOI:
10.1016/j.watres.2021.117221

40. Statistical optimization and modeling for color removal and COD reduction of reactive blue 19 dye by mesoporous chitosan-epichlorohydrin/kaolin clay composite

Author:
Ali H. Jawad; Ahmed Saud Abdulhameed; Nurul Najwa Abd Malek; Zeid A. ALOthman
Source:
International journal of biological macromolecules 2020 v.164 pp. 4218-4230
ISSN:
0141-8130
Subject:
absorption; adsorbents; adsorption; chemical oxygen demand; chitosan; clay; crosslinking; decolorization; dyes; endothermy; epichlorohydrins; experimental design; fabrics; hydrogen; hydrogen bonding; kaolin; models; pH; polymers; porous media; response surface methodology; sorption isotherms; thermodynamics
Abstract:
... In current research work, chitosan (Chi) was subjected to subsequent physical and chemical modifications by incorporating kaolin clay (KA) into its polymeric structure, and crosslinking process with a covalent cross-linker namely epichlorohydrin (ECH) respectively. The final product of crosslinked chitosan-epichlorohydrin/kaolin (Chi-ECH/KA) composite was successfully applied for color removal and ...
DOI:
10.1016/j.ijbiomac.2020.08.201

41. Synthesis of novel poly (vinyl alcohol)/tamarind gum/bentonite-based composite films for drug delivery applications

Author:
Dilshad Qureshi; Kiran Prava Behera; Debashish Mohanty; Santosh K. Mahapatra; Sarika Verma; Prakit Sukyai; Indranil Banerjee; Sumit K. Pal; Biswaranjan Mohanty; Doman Kim; Kunal Pal
Source:
Colloids and surfaces 2021 v.613 pp. 126043
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; absorption; antimicrobial properties; bentonite; ciprofloxacin; clay; drug delivery systems; hydrogen; solvents; tamarinds; topology
Abstract:
... In this study, a series of novel composite films comprised of poly (vinyl alcohol) (PVA), tamarind gum (TG), and bentonite clay particles were prepared using the solvent casting method. The prepared composite films appeared colorless and transparent. Ultraviolet-visible (UV–vis) spectroscopy revealed that the prepared films showed higher absorption in the UV region as compared to the visible regio ...
DOI:
10.1016/j.colsurfa.2020.126043

42. Attapulgite‐supported magnetic dual acid–base catalyst for the catalytic conversion of lignin to phenolic monomers

Author:
Zhen Wu; Jun Zhang; Xinxu Zhao; Xun Li; Yu Zhang; Fei Wang
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.4 pp. 1269-1281
ISSN:
0268-2575
Subject:
biorefining; catalysts; catalytic activity; clay; ethanol; hydrogen; lignin; magnetic properties; magnetism; value added
Abstract:
... BACKGROUND: Research on the catalytic conversion of lignin into value‐added chemicals has grown rapidly on account of the importance of lignin in the biorefinery. There is thus a need to investigate novel technologies to depolymerize lignin in the absence of hydrogen gas and noble metal catalysts. This study developed a cheap and recyclable catalyst via a facile process involving impregnation and ...
DOI:
10.1002/jctb.5881

43. Climate and environmental response to the break-up of Pangea during the Early Jurassic (Hettangian-Pliensbachian); the Dorset coast (UK) revisited

Author:
Iris Schöllhorn; Thierry Adatte; Bas Van de Schootbrugge; Alexander Houben; Guillaume Charbonnier; Nico Janssen; Karl B. Föllmi
Source:
Global and planetary change 2020 v.185 pp. 103096
ISSN:
0921-8181
Subject:
Hettangian age; Pliensbachian age; Sinemurian age; Toarcian age; basins; carbon dioxide; carbonates; clay; climatic factors; coasts; emissions; environmental impact; extinction; greenhouse gases; humid zones; hydrogen; illite; kaolinite; molybdenum; oxygen; palaeogeography; paleoceanography; pyrite; runoff; stable isotopes; tectonics; total organic carbon; water temperature; United Kingdom
Abstract:
... Between the end-Triassic mass extinction and the Toarcian Oceanic Anoxic Event, the Early Jurassic witnessed important changes in carbon burial, palaeogeography and paleoceanography, which were linked to the initial breakup of Pangaea. In order to better understand the climate and environmental impact of this phase of major tectonic rearrangement we revisited a key section along the Dorset coast ( ...
DOI:
10.1016/j.gloplacha.2019.103096

44. Experimental evaluation of the role of redox during glauconite-CO2-brine interactions

Author:
Benjamin M. Tutolo; Timothy Kiesel; Andrew J. Luhmann; Peter Solheid; William E. Seyfried
Source:
Applied geochemistry 2020 v.115 pp. 104558
ISSN:
0883-2927
Subject:
carbon dioxide; clay; clay minerals; diagenesis; geochemistry; hydrogen; iron; iron carbonate; magnetite; oxidation; oxygen; sandstone; siderite; sodium bicarbonate; sodium chloride; spectral analysis; thermodynamics; trapping
Abstract:
... Greensands formations are globally abundant sedimentary rocks rich in Fe clays (typically glauconite) that commonly contain natural hydrocarbon accumulations and may be important reservoirs for geologic storage of anthropogenic CO₂. Diagenesis in greensands is commonly accompanied by the conversion of primary glauconite to siderite (FeCO₃), a process that could be exploited for the permanent trapp ...
DOI:
10.1016/j.apgeochem.2020.104558

45. Functional biobased hydrogels for the removal of aqueous hazardous pollutants: current status, challenges, and future perspectives

Author:
Chirag Batukbhai Godiya; Luis Augusto Martins Ruotolo; Weiquan Cai
Source:
Journal of materials chemistry A 2020 v.8 no.41 pp. 21585-21612
ISSN:
2050-7496
Subject:
adsorbents; adsorption; biochar; biomass; carbon nanotubes; cellulose; clay; cost effectiveness; decontamination; drugs; economic sustainability; fabrics; graphene; heavy metals; hydrogels; hydrogen; microstructure; nitrogen; oxygen; polymers; porosity; starch; sulfur; surface area; wastewater treatment; water pollution
Abstract:
... Contaminated water and scarcity of clean water are serious global environmental concerns. Elimination of hazardous organic/inorganic contaminants from water/sewages is essential and demands immediate attention in order to protect pure water resources. Adsorptive decontamination of aqueous pollutants is widely accepted technology owing to its simple handling, higher efficiency and economic viabilit ...
DOI:
10.1039/d0ta07028a

46. Kinetic, isotherm and mechanism investigations of the removal of phenols from water by raw and calcined clays

Author:
Hassan Ouallal; Younes Dehmani; Hamou Moussout; Lahcen Messaoudi; Mohamed Azrour
Source:
Heliyon 2019 v.5 no.5 pp. e01616
ISSN:
2405-8440
Subject:
Gibbs free energy; X-radiation; adsorbents; adsorption; aluminum oxide; clay; endothermy; enthalpy; fluorescence; heat treatment; hydrogen; kinetics; organic matter; pH; phenol; silica; sorption isotherms; standard deviation; temperature; Morocco
Abstract:
... In this work, the phenols removal of phenol from water by raw clay (RCG) and calcined one at 1000 °C (CCG) of Goulmima city (Morocco) was investigated. The kinetics and isotherms experiments were also studied at pH = 4. The results indicated that the phenol adsorption reached equilibrium within 3 h, and the removal of phenol was enhanced at the same temperature by CCG (2.932 mg/g) adsorbent, compa ...
DOI:
10.1016/j.heliyon.2019.e01616
PubMed:
31193010
PubMed Central:
PMC6512880

47. Life-Cycle Assessment of Adsorbents for Biohydrogen Production

Author:
Yuna Seo; Masaya Suzuki; Tetsuichi Takagi; Kiyoshi Dowaki
Source:
Resources 2019 v.8 no.1 pp. -
ISSN:
2079-9276
Subject:
adsorbents; adsorption; aluminum silicates; carbon dioxide; carbon monoxide; catalysts; clay; climate change; electric potential difference; environmental impact; fossils; fuel cells; gas production (biological); hydrogen; hydrogen production; hydrogen sulfide; life cycle assessment; longevity; methane; oils; zeolites
Abstract:
... Adsorbents are used to remove impurities such as carbon monoxide, carbon dioxide, methane, and hydrogen sulfide in the pressure swing adsorption process of biohydrogen production. These impurities are present in the produced gas along with hydrogen and often cause voltage reduction in fuel cells and shorten the lifespan of catalysts. Zeolite A is a typical adsorbent, and more recently, hydroxyl al ...
DOI:
10.3390/resources8010052

48. Synergistic effects of aluminum/iron oxides and clay minerals on nutrient removal and recovery in water filtration media

Author:
Diana Ordonez; Andrea Valencia; Ni-Bin Chang; Martin P. Wanielista
Source:
Journal of cleaner production 2020 v.275 pp. 122728
ISSN:
0959-6526
Subject:
aluminum; ammonia; byproducts; clay; clay minerals; diammonium phosphate; eutrophication; filtration; food production; hydrogen; iron; iron oxides; nitrate reduction; nitrates; nutrients; phosphorus; pollution load; sorption; stormwater; stormwater management; surface water; urban farming
Abstract:
... The eutrophication of water bodies due to excessive amounts of nutrients is an ongoing issue that coincides with the depletion of the commercial and affordable phosphorus reserves that are required for food production. This paper presents the investigation of Advanced Green Environmental Media (AGEM) for nutrient removal and recovery, in stormwater runoff or agricultural discharge, via a laborator ...
DOI:
10.1016/j.jclepro.2020.122728

49. A review of the retention mechanisms of redox-sensitive radionuclides in multi-barrier systems

Author:
Bin Ma; Laurent Charlet; Alejandro Fernandez-Martinez; Mingliang Kang; Benoît Madé
Source:
Applied geochemistry 2019 v.100 pp. 414-431
ISSN:
0883-2927
Subject:
X-ray absorption spectroscopy; X-ray photoelectron spectroscopy; biosphere; biotite; casks; cement; clay; concrete; copper; corrosion; geochemistry; granite; groundwater; hydrogen; iodine; iron; magnetite; mica; oxidation; oxyanions; pyrite; radioactive waste; radionuclides; reaction kinetics; safety assessment; selenium; solubility; steel; uranium; uranyl ions
Abstract:
... The deep geological disposal concept is widely accepted by the scientific community for the storage of high activity level nuclear waste. It uses a multi-barrier system to isolate radioactive waste from the hydrosphere and biosphere for hundreds of centuries. The multiple barriers include, from the waste to near- and far-field: metal (e.g., iron or copper) and/or concrete canisters/casks containin ...
DOI:
10.1016/j.apgeochem.2018.12.001

50. Catalytic gasification of refuse-derived fuel in a two-stage laboratory scale pyrolysis/gasification unit with catalyst based on clay minerals

Author:
Patrik Šuhaj; Juma Haydary; Jakub Husár; Pavol Steltenpohl; Ivan Šupa
Source:
Waste management 2019 v.85 pp. 1-10
ISSN:
0956-053X
Subject:
X-radiation; X-ray diffraction; X-ray fluorescence spectroscopy; carbon monoxide; catalysts; catalytic activity; clay; clay minerals; cracking; energy; feedstocks; fluorescence; gasification; heat treatment; hydrogen; landfills; models; municipal solid waste; oxygen; pyrolysis; refuse derived fuels; scanning electron microscopy; surface area; synthesis; synthesis gas; temperature; thermogravimetry; waste management; xylene
Abstract:
... Municipal solid waste (MSW) disposal is a serious environmental issue requiring immediate solution and good waste management strategy. Mechanical-biological treatment (MBT) plants offer the opportunity to reduce the amount of MSW that is, otherwise, disposed of in landfills. Up to 40% of MSW is converted to waste fuel, also called refuse-derived fuel (RDF). Gasification is a promising alternative ...
DOI:
10.1016/j.wasman.2018.11.047