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This study reports the mercury binding by bentonite clay influenced by cattle manure–derived dissolved organic matter (DOM). The DOM (as total organic carbon; TOC) was reacted with bentonite at 5.2 pH to monitor the subsequent uptake of Hg2+ for 5 days. The binding kinetics of Hg2+ to the resulting composite was studied (metal = 350 µM/L, …
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1. Introduction. Bentonite is an aluminum phyllosilicate clay consisting primarily of montmorillonite. It is obtained by open pit mining and used in various applications such as in the production of ceramics, adhesives, catalysts, desiccants, cosmetics, and has pharmaceutical applications.
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Bentonite is a complex hydrated aluminium silicate with exchangeable cationic components: (Al, Fe, Mg) Si 4 O 10 (OH) 2 (Na,Ca). The most commonly used …
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The performance of bentonite barriers in the < 100°C temperature range is underpinned by a broad knowledge base built on laboratory and large-scale in-situ experiments. Bentonite parameter characterization above 100°C is sparser (especially for pelletized materials), although up to about 150°C no significant changes in safety-relevant ...
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In this work, bentonite was encapsulated into PVA/SA matrix to fabricate bentonite/PVA/SA aerogel (BPS) using lanthanum (La) as the cross-linking agent. La (III) cross-linking reaction with polymers realized synchronous gelation and lanthanum introduction into the composite, which endowed BPS with efficient phosphate removal …
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An Introduction to Bentonite Waterproofing. Bentonite clay and soil thrive when regularly exposed to water. The particles that make up this type of soil swell when they come into contact with water more so …
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Introduction to Bentonite. Bentonite is a type of absorbent clay primarily composed of aluminosilicate minerals such as montmorillonite. It was named after Fort Benton in Wyoming, where the largest source of the clay was first identified. Bentonite possesses some unique properties that make it incredibly useful in many industries and ...
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On the basis of textural and hydro-mechanical characteristics, bentonite has been proven to be an effective buffer/backfill material for long-term containment of high-level radioactive waste (HLW) in deep geological repositories. Herein, the results of experiments performed to investigate the swelling equilibrium limit (SEL) of bentonite under various …
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Bentonite, clay formed by the alteration of minute glass particles derived from volcanic ash. It was named for Fort Benton, Mont., near which it was …
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Bentonite clay has been shown to act as a detoxifying agent. This property is referred to its poly-cationic nature, which leads to absorption of negative charge toxins ( 7 ). T-2 is a trichothecene mycotoxin which is a naturally occurring mold byproduct of Fusarium fungus and is toxic to humans and animals.
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Introduction of bentonite as cement replacement, and higher. the bentonite contents lower is the density. This is due to the . fact that the density being a function of specific gravity. ...
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Introduction. The removal of emerging contaminants from aquatic ecosystems has gained much interest due to their associated environmental risks and impact on human and animal health. ... Bentonite is an inorganic 2:1 type clay mineral, which is mainly constituted of montmorillonite (Maged et al. 2020).
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INTRODUCTION Although the bentonite industry is slightly over 70 years old, the name bentonite Was applied as early as 1848 by Knight to a highly plastic clay material occurring near Fort Benton, Wyoming (Grim, 1953, p. 361). Accord ing to Chisholm (1960, p. 30) the first commercial bentonite was shipped in 1888 under the name "Taylorite".
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The widespread Balıkesir bentonite deposits within the Miocene volcano-sedimentary units in western Anatolia have economic potential; they are important raw materials for the paper and bleaching …
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This study investigated the effect of elevated temperature on the mechanical, physical and durability properties of normal strength concrete, modified with bentonite. The bentonite concrete was cast by substituting cement with bentonite content in proportions of 5, 10 and 15% by weight. Mechanical tests were conducted (compressive and splitting …
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Bentonite and other clay rocks are of paramount importance in the field of environmental and waste management [14–32].Bentonites are a group of natural nanomaterials composed predominantly of crystalline mineral particles from the group of dioctahedral smectites—montmorillonite [33, 34].Bentonites from Slovak deposits should …
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Due to its high swelling capacity, contaminant adsorption capacity, and low value of hydraulic conductivity, compacted bentonite is used as a liner material at the waste disposal site. However, the presence of various heavy metal pollutants in the leachate could affect the swelling and sorption capacity of bentonite and in turn reduce its usefulness …
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Bentonite fining is one of the generally applied wine-making technological elements that may seriously affect wine components. The aim of this study was (i) to investigate the effect of 21 bentonite products on eight oenological parameters, 19 elements, 21 volatile organic compounds (VOCs) and 10 organoleptic properties of white …
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Bentonite is a clay with interesting surface properties (affinity for water, adsorption capacity for electro-positive compounds….). The characteristics and clarifying properties of bentonite from various companies are the subject of numerous studies. The present work focuses on the study of the efficiency of bentonite and modified bentonite …
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Bentonite is used in oenology to improve the limpidity and the stability of wine and to predict the formation of deposits in the bottle. The exchangeable cations in its lamellar structures strongly influence some properties, such as the specific surface, the exchange capacity and the adsorption behavior. The unintended use of bentonite for …
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During the long-term operation of a repository, bentonite–sand mixture could invade into fractures in the surrounding rock with infiltration of groundwater, resulting in loss of bentonite from the barrier with possible leakage of nuclides and consequently endangers the safety of the repository. In this work, an apparatus was designed with an artificial joint …
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A large amount of bentonite slurry is dumped as construction waste in fill banks around the world. In order to reuse them, it is important to determine the mechanical and hydraulic parameters of bentonite-soil mixtures containing different montmorillonite contents. The establishment of these parameters with index properties is an efficient and …
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In the present study, removal of Cd2+, Cu2+, Ni2+ and Pb2+ from mono- and multi-metal ion aqueous solutions using natural Ca-bentonite was studied. Removal efficiency from synthetic aqueous solutions and real wastewater was investigated under various conditions such as variable concentration of metal ion, amount of clay, pH, and …
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The current book describes the bentonite characteristic, uses and implications for the environment in many areas of environmental science in particular, such as remediation, clean energy, water ...
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Introduction Chapter1 ... Bentonite presents complexity at various scales: (1): a single mineral may present different chemical composition within the same quarry (e.g., feldspars solid solutions ...
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1. Introduction. As an important industrial material, bentonite has been widely applied in agricultural, medical, and energy fields for decolorization, suspension, and stabilization [1,2,3].During drilling for oil or gas, bentonite can effectively reduce the loss of the filtration of the water-based drilling fluid and improve the ability of the water-based …
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Bentonite primarily consists of montmorillonite and, when compacted, is characterized by a multi- porosity structure. Its microstructure evolves upon water saturation, influencing the hydro-mechanical response at the laboratory scale. Experimental evidences highlight how bentonite saturated permeability spans over several orders of magnitude …
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Layered clay minerals have attracted considerable attention of the scientific community due to their promising inherent features such as large surface areas, adsorption capabilities, charge diffusion and ion-exchange properties, good swelling behavior, and eco-friendly nature [].Bentonite is a clay that is basically enriched in smectite minerals [], …
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Introduction. Compacted bentonite is a major packing and storage material, due to its extremely low hydraulic conductivity. Although the physical transport through …
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3.1.4. Determination of BET Surface Area. The surface area of bentonite shows a significant increase with activation by acid. Measured values are 66.2 and 287.8 m 2 g −1 for raw and activated bentonite, respectively. Since this increase is a result of removing impurities, replacement of exchangeable cations, such as K +, Na +, and Ca …
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