introduction on bentonite

Bentonite - an overview ScienceDirect Topics

Bentonites are classified into three main categories according to the proportion of exchangeable sodium and calcium cations they contain, their swelling index, and their pH. These categories are natural sodium bentonite, natural calcium bentonite, and activated

Bentonite - an overview ScienceDirect Topics

Bentonite is an off-white montmorillonite clay formed from altered volcanic ash. It has a sheet-silicate structure and is especially notable for the way in which it absorbs and loses

Bentonite Formula, Properties Application

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

Bentonite Volcanic ash, Healing, Detoxification Britannica

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 discovered. The formation of

Bentonite Properties, Formation, Uses » Geology

2023.5.2 University of Wisconsin-Madison. Bentonite is a type of clay that is composed primarily of the mineral montmorillonite. It is a highly absorbent clay that has many uses in various industries, including

BENTONITE, KAOLIN, AND SELECTED CLAY MINERALS

2019.5.23 BENTONITE, KAOLIN, AND SELECTED CLAY MINERALS First draft prepared by Dr Zoltán Adamis, József Fodor National ... 2.1 Introduction 8 2.2 Identity 9

Synthesis, characterization and properties of organically

2020.4.14 Abstract. A new process for manufacturing organically compounded bentonite was developed successfully based on the organic intercalation and layered

Swelling Characteristics and Permeability of Bentonite

1. Introduction Bentonite is thought to have been formed millions to hundreds of millions of years ago by volcaniclastic sediments subjected to physicochemical and hydrothermal

Thermoresponsive Bentonite for Water-Based Drilling Fluids

2019.6.30 As an important industrial material, bentonite has been widely applied in water-based drilling fluids to create mud cakes to protect boreholes. However, the

Bentonite Clay as a Natural Remedy: A Brief Review - PMC

2016.11.27 The effect of bentonite on body function Detoxification. Bentonite clay has been shown to act as a detoxifying agent. This property is referred to its poly-cationic

Adsorption behavior of bisphenol A on bentonite-loess

2021.8.27 The leakage of chemical compounds in landfill leachate led to serious environment pollution, especially, the compounds termed endocrine disruptors such as bisphenol A (BPA). It is very important to study the adsorption behavior of endocrine disruptors in modified soil for predicting and evaluating the potential harm of endocrine

Synchronous gelation and lanthanum introduction using bentonite

2022.3.10 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

Congo red dye removal from aqueous solution by acid-activated bentonite ...

2019.4.13 Introduction. As one of many developing countries, growth of the traditional textile industry in Indonesia gradually increased year by year. ... Bentonite is one of the most utilized clay materials. It is a naturally occurring clay that is mainly constituted of montmorillonite mineral. Bentonite is also well known as dioctahedral 2:1 layer ...

Preparation and Characterization of Magnetic Iron

2021.1.11 Abstract The problems associated with heavy metal pollutants in household and industrial wastewater affect both humans and the environment. Studies showed that bentonite/Fe3O4 nanoparticles and sodium alginate could be used for effective adsorption of lead ions. To this end, this study first synthesized four groups of bentonite

The sorption performance of corroded Gaomiaozi bentonite

2020.4.28 In the Chinese high-level radioactive waste geological disposal program, Gaomiaozi (GMZ) bentonite has been selected as the potential buffer/backfill material. After the closure of the repository, the Ca-OH-type alkaline solution (evolved cement water) released by cement degradation may last for more than 100,000 years. The bentonite will

Polymer Elution and Hydraulic Conductivity of Bentonite

Hydraulic conductivity tests were conducted on two commercially available bentonite–polymer composite (BPC) geosynthetic clay liners (GCLs) containing the same dry blend of sodium bentonite (NaB) and polymer sandwiched between two nonwoven geotextiles (GTs) bound by needlepunching: a bentonite–polymer GCL (BP GCL) and

Montmorillonite: An Introduction to Properties and Utilization

2018.9.12 2. Bentonite. Bentonite is an important rock of clay found in nature. It is an important source of montmorillonite in nature. It is a rock formed of highly colloidal and plastic clays mainly composed of montmorillonite . In addition to montmorillonite, bentonite may contain some amount of crystalline quartz, cristobalite, and feldspar.

Anion exclusion and sorption effect for compacted bentonite

2021.4.21 Quantitative calculation based on the joint action of anion exclusion and sorption has not been reported. This article studies the diffusion behavior of Se(IV) in MX-80 bentonite fills in different lengths by the through-diffusion method. The anion exclusion and sorption are simultaneously considered and quantitatively calculated. The results show

Synthesis of magnetic bentonite–gelatin hydrogel beads and

2023.11.25 Heavy metal ions that exist in groundwater and farmland jeopardize the ecological environment and are very difficult to remove because of the complicated actual environment. Raw bentonite–gelatin beads (RB-GT) and magnetic bentonite–gelatin beads (MB-GT) synthesized in this work would be an appropriate tool to solve this problem.

Sorption of Lithium on Bentonite, Kaolin and Zeolite

2015.4.14 Li sorption was studied on natural bentonite, kaolin and zeolite in batch experiments at variable Li and Na concentrations (0, 1.5, 15, 150, 750 mM LiCl and 0.01, 0.1, 1, 3, 5 M NaCl). The solid-to-solution ratio was 1:4 and pH ranged from 2 to 10. Maximum Li sorption was determined at 0.01 M NaCl and 750 mM LiCl concentration in

(PDF) Effect of pH on Rheological and Filtration

2019.11.27 It is recommended from the results to keep the pH of water-based drilling fluid based on bentonite in the range of 9 to 10 as it provides the optimum mud rheological and filtration properties.

Full article: Study of the impact of bentonite on the physico ...

2018.3.8 The density decreases with the introduction of bentonite as a replacement for cement. It should be noted that the higher the bentonite content, the density is reduced. This is due to the fact that the density of cement grout depends on the specific gravity of solids (bentonite and cement). Since the specific gravity of cement is greater as ...

Innovations in the Use of Bentonite in Oenology

2016.10.19 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

Co-modification of Bentonite by CTAB and Silane and its

2021.1.5 The stability, dispersion, and rheological properties of clay suspensions are important in the process of drilling. Organic clays were obtained traditionally by cation exchange, which is thermally unstable due to weak electrostatic interaction between the cationic surfactant and clay minerals. The purpose of the present study was to yield a

Effect of gamma-irradiation on adsorption properties of

2012.1.28 Bentonite and other clay rocks are of paramount importance in the field of environmental and waste management [1–6].Bentonites from Slovak deposits should be used as part of multi-barrier system in deep geological repositories for spent nuclear fuel and radioactive waste [7–10].This requires extensive multidisciplinary research a

Adsorption of Cd(II), Cu(II), Ni(II) and Pb(II) onto natural bentonite ...

2014.10.28 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

Estimation of mechanical and hydraulic parameters of bentonite

2023.2.18 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

BENTONITE, KAOLIN, AND SELECTED CLAY MINERALS

2019.5.23 BENTONITE, KAOLIN, AND SELECTED CLAY MINERALS First draft prepared by Dr Zoltán Adamis, József Fodor National ... 2.1 Introduction 8 2.2 Identity 9 2.2.1 Bentonite 9 2.2.2 Kaolin 11 2.2.3 Other clays 12 2.3 Physical and chemical properties 14 2.3.1 Bentonite 14 2.3.2 Kaolin 15 ...

Highly efficient removal of uranium (VI) from aqueous

1 天前 The generation of nuclear energy produces a large amount of uranium containing wastewater, which must be treated. In this study, amino functionalized bentonite (Bent-NH2) was prepared by modifing Gaomiaozi bentonite with 3-Aminopropyltriethoxysilane. Various characterization results confirmed the successful grafting. The batch adsorption

Bentonite binding with mercury(II) ion through promotion of

2022.11.9 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

Bentonite Clay as a Natural Remedy: A Brief Review - PMC

2016.11.27 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.

Swelling Behavior of Sand–Bentonite Mixtures Journal of

2023.7.5 Abstract In this study, the swelling behavior of sand-bentonite mixtures and pure bentonite is investigated by considering different factors, such as bentonite content in the mixture, specimen preparation method by applying different compactive efforts, and various effective stress levels. Compaction tests were performed on the specimens of the

A method for predicting swelling pressure of compacted bentonites

2008.5.16 An approach for predicting swelling pressure of bentonites based on thermodynamic relationships between swelling pressure and suction is presented in this paper. The proposed method requires sorption isotherm data of the bentonites. A series of swelling pressure tests were performed on compacted specimens of bentonite-sand

A mechanism for bentonite buffer erosion in a fracture with

2015.11.1 Introduction. T his study focuses on the KBS-3V concept for the deep geological disposal of high level nuclear waste in crystalline rock, the current reference disposal concept of SKB and Posiva. The bentonite buffer plays an integral role in the multi-barrier system for the isolation of high level nuclear waste and is required to perform a ...

Thermoresponsive Bentonite for Water-Based Drilling Fluids

2019.6.30 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

Bentonite-modified electrochemical sensors: a brief overview

2017.7.15 The modified electrodes can provide improved electrochemical sensing because of enhanced electrocatalytic activity and good selectivity because modifiers are selected based on their interaction toward target analyte. Bentonite-modified electrodes have been explored for analysis of cadmium [ 18 ], arsenic [ 8, 19 ], lead [ 20, 21 ], and ...

Adsorption of ammonia nitrogen in low temperature

2019.10.1 Bentonite was used as adsorbent, which was modified by aluminum cross-linking and tannin double modification (Al-Tan-Bent), and the adsorbent has excellent removal performance for ammonia nitrogen (NH 4 +-N) from low temperature wastewater.In the experiments, the effects of adsorbent dosage, pH, contact time, and coexisting ions

Montmorillonite: An Introduction to Properties and Utilization

2018.9.12 Montmorillonite is introduced in terms of its natural sources, chemical structure, physical and chemical properties, and functional utilization. The important physical and chemical properties are ...

Adsorption of Cu (II) and Ni (II) ions from wastewater onto bentonite ...

2020.6.12 Two superior adsorbents, namely bentonite and graphene oxide (GO), were hybridised to study the removal of copper and nickel ions from synthetic and industrial wastewater. The as-synthesised GO, bentonite/GO and bentonite were characterised by Fourier transform infrared spectroscopy, scanning electron microscopy, energy