Bentonite Mechanism
Elucidation of the aggregation mechanism of bentonite with …
The mechanism of bentonite aggregation with CGG was elucidated by investigating the amount of CGG adsorbed and the spacing d 001 between the bentonite layers in bentonite aggregates. Additionally, the applicability to the filtration method …
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Bentonite: Uses, Interactions, Mechanism of Action
Bentonite can cause a decrease in the absorption of Tauroursodeoxycholic acid resulting in a reduced serum concentration and potentially a decrease in efficacy. Technetium Tc-99m oxidronate The serum concentration of Technetium Tc-99m oxidronate can be increased when it is combined with Bentonite.
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Characterization of activated bentonite clay mineral and the mechanisms …
The presence of emerging pollutants such as hazardous chemicals, pharmaceuticals, pesticides, and endocrine-disrupting chemicals in water sources is a serious concern to the environment and human health. Thus, this study focused on exploring the interaction mechanisms between ciprofloxacin (CIP) (an …
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Performance and mechanism of bentonite in …
Methane explosions threaten the safety of industrial security in modern society. To suppress such explosions, experiments were made through using different masses of bentonite power driven by CO2 within a pipe …
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One step acid activation of bentonite derived adsorbent …
Modified bentonite. Bentonite, supplied by Sigma-Aldrich was applied as the raw precursor in this work. The acid modification was conducted by properly mixing bentonite with 8 M of nitric acid at ...
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Mechanism study of ethyl xanthate degradation catalyzed …
Mechanism study of ethyl xanthate degradation catalyzed by activated bentonite-based bismuth ferrites composite in visible-light-driven photo-Fenton process. Author links open overlay panel Yanjuan Yang a, Guangtao Wei a b, Youlian Zhu a, Linye Zhang a c, Zhongmin Li a, Zhuang Li a, Xiaofeng Ding a.
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Effect of bentonite as a soil amendment on field water …
The mechanism by which water is held by bentonite, a natural clay material, and synthetic superabsorbent polymers is very different which results in different optimum application rates, and ...
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Site water salinity effect on the hydro-mechanical behavior …
From the mechanism of water migration under the suction gradient, the outer bentonite (close to the water-filled technological void) can absorb more water, followed by the middle and inner parts. The above phenomenon was confirmed in water content measurement at different sampling sites after the tests (Fig. 6 a).
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(PDF) Binary comparative study adsorption of anionic and …
Binary comparative study adsorption of anionic and cationic Azo-dyes on Fe 3 O 4 -Bentonite magnetic nanocomposite: Kinetics, Equilibrium, Mechanism and Thermodynamic study
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Intercalation of lecithin into bentonite: pH dependence and
Modification mechanism. Bentonite layers have permanent negative charges due to isomorphic substitutions and the imbalance of the negative charges is compensated by exchangeable cations. Additionally, pH-dependent charges are developed by the surface hydroxyl groups at the montmorillonite's edges (Tombácz et al., 2004; Zhang et al., 2021). The ...
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Insight into barrier mechanism of fly ash-bentonite blocking wall …
Taking Pb (II) as the target pollutant in groundwater, the barrier mechanism of fly ash-bentonite blocking wall was studied from three aspects, i.e., the adsorption mechanism, migration characteristic and influencing factors for service life. The adsorption isotherms and the kinetics of fly ash-bentonite were most in line with Freundlich model ...
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Adsorption performance of bentonite and clay for Zn(II) in …
The mechanism involves van der Waals forces, ion exchange, and chemical actions such as inner-sphere complexation for Zn(II) adsorption onto both bentonite and clay. The increasing prevalence of the Galvanized and dry battery industries has led to a rise in zinc proportions in landfills, posing environmental risks.
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Flame retardant mechanism of organo-bentonite in polypropylene
The organo-bentonite displayed reflection at 3.99° corresponding to a basal spacing of 2.21 nm (Fig. 1).For the characteristic basal reflection disappeared after the introduction of intumescent flame retardant and PP-g-MAH, which may be due to the exfoliation of the clay mineral or to too low concentrations of the bentonite.The majority of IFR particles which can …
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Enhancing the flocculation of stable bentonite suspension …
Moreover, the high MW of AN 923 SH and AN 956 SH providing long-chain flocculants plays a major role in the flocculation tendency of the polyelectrolyte through the bridging mechanism. Hence, flocculation of bentonite suspension with NADES/ APAM hybrid system occurs through charge neutralization, adsorption, and bridging which explains the ...
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Review of polymer-amended bentonite: Categories, mechanism …
Polymer-amended bentonite is a kind of high-performance bentonite material, which has been widely researched and applied in barrier engineering. This paper summarizes the modification mechanism and process of polymer-amended bentonite in previous studies and discusses its modification effect for impermeability and isolating capacity as barrier materials.
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Combined remediation mechanism of bentonite and …
The diffusive gradients in thin films (DGT) technique was applied to determine the mechanism by which bentonite improves the eutrophic lake sediment microenvironment and enhances submerged plant growth. The migration dynamics of N, P, S, and other nutrient elements were established for each sediment layer and the remediation effects of ...
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Immobilization of phosphorus in water-sediment system by …
Four kinds of iron-based materials, i.e., iron-modified attapulgite, calcite, bentonite and dolomite (abbreviated as Fe-ATP, Fe-CA, Fe-BT and Fe-DOL, respectively) were prepared and used to immobilize the phosphorus in the system of overlying water (O-water) and sediment under the feed input condition, and their immobilization efficiencies and mechanisms were …
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Review of polymer-amended bentonite: Categories, mechanism …
DOI: 10.1016/j.clay.2023.106869 Corpus ID: 257066922; Review of polymer-amended bentonite: Categories, mechanism, modification processes and application in barriers for isolating contaminants
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Efficient removal of nitrate by three-dimensional …
The Cu-Ag/Bent was prepared by sodium borohydride-based liquid-phase method through simultaneous reduction of Cu 2+ and Ag + according to the existing research [11,437].The experimental schematic of the preparation process is shown in Fig. 1 (a).First, an amount of purified bentonite was mixed with 50 mL of deionized water, and then the mixture …
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Bentonite-supported nano zero-valent iron composite as a …
The BPA degradation mechanism of NZVI@bentonite may involve adsorption coupled with the Fenton-like reaction. Moreover, NZVI@bentonite exhibited a BPA degradation ratio comparable with those of other catalysts/adsorbents. Hence, easily available and low-cost bentonite composites can be successfully applied to degradation BPA from wastewater ...
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Recent advances of application of bentonite-based …
Meanwhile, the effect of environmental factors and interaction mechanism between bentonite-based composites and contaminants were also investigated. Finally, the conclusions and prospective of bentonite-based composites in the environmental remediation were proposed. It is demonstrated that various bentonite-based composites exhibited the high ...
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Bentonite homogenization with technological voids upon …
Intrinsic mechanism of bentonite homogenization. To further analyze the intrinsic mechanism of bentonite homogenization, Fig. 6 (a)-(b) shows the dry density profile evolution over hydration time and simulation results using the method proposed in the article. It appeared clear that the predicted dry density distribution can well capture the ...
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Mechanisms of bentonite colloid aggregation, retention, and …
In this work, the aggregation, retention, and release of bentonite colloid in saturated porous sand media were investigated by kinetic aggregation and column experiments, the …
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Removal of Cu (II) by sodium hexametaphosphate and nano …
Cu(II) can be removed by the rapid surface adsorption on the NZVI/SHMP-CaB and ion exchange with interlayer ions in bentonite. Meanwhile, the removal mechanism of Cu(II) also involved the chemical reduction to insoluble forms such as Cu 0 and Cu 2 O.
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Alkaline buffer characteristics and mechanism of …
bentonite in KOH solution, the relationship between each inuencing factor and the alkaline buer characteristics was explained. Based on the alkaline buffer mechanisms, the thickness of the bentonite buer barrier without ABC during the operation of the HLW repository was determined. The results can enrich the research on the reaction system of
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Efficient removal of nitrate by three-dimensional …
Efficient removal of nitrate by three-dimensional electrocatalytic system with bentonite-based Cu-Ag particle electrode: Fabrication, process and mechanism. Author links open overlay panel Ruihua Xue a 1, Linye Zhang a b 1, Junchi Gu a, Yanling Zhou a, Guangtao Wei a, Changli Yang a, Zhile Huang a, Zhiwei Xie a. Show more.
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Effects of synthetic processes on the swelling capacity and
Modified bentonite with over 6% CMC dosage has the swell index (> 43.7 ml/2 g) that is close to or higher than that of common commercial polymer-modified bentonite, such as 37 ml/2 g of Hyper clay and 45 ml/2 g of BPC (Di Emidio, 2010; Tian et al., 2016), and is 20–35% higher than that of CMC-modified bentonite adopting Chinese bentonite as ...
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Bentonite
Swelling Mechanism. The swelling mechanism of bentonite results from the unique microstructure and its net negative charge (Low 1987). Bentonite is a mixture of clayey …
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Simultaneous sorption of heavy metals on Algerian Bentonite: mechanism
Algerian Bentonite used as raw and low cost adsorbent.The maximal adsorbed quantities of cadmium and iron are respectively 76 mg/g and 55 mg/g ... Simultaneous sorption of heavy metals on Algerian Bentonite: mechanism study Radhia Yous; Radhia Yous a Laboratoire des Biomatériaux et des Phénomènes de Transferts LBMPT, Université de ...
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Cd(II) and Pb(II) absorbed on humic acid-iron-pillared bentonite …
The micro/mesostructure and surface morphology play a vital role in the physical sorption. The SEM micromorphology of the original bentonite particles presented a thick layer, and the overall distribution was sporadic and uneven (Fig. 1 a).After modified by iron column proppant, the contour structure of Fe-PILC was obvious, and the particles still maintained the …
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