Modification of bentonite clay & its applications: a review

IF 4.1 3区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Reviews in Inorganic Chemistry Pub Date : 2021-11-10 DOI:10.1515/revic-2021-0030

D. Borah, H. Nath, Hemaprobha Saikia

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引用次数: 20

Abstract

Abstract Bentonite clay is one of the oldest clays that humankind has been using from ancient times as traditional habits and remedies. In recent years researchers have found many applications of bentonite clay due to its various physio-chemical properties. In the present work, various physical and chemical properties of bentonite such as surface area, adsorption, swelling properties, cation exchange properties, etc. have been studied. This study also includes various procedures of modification of bentonite clay into Chitosan/Ag-bentonite composite, Fe-Modified bentonite, Hydroxyl-Fe-pillared-bentonite, Organo Bentonite, Organophilic clay, Arenesulfonic Acid-Functionalized Bentonite, Bentonite clay modified with Nb2O5. The study reveals that bentonite clay has large surface area due to similar structure with montmorillonite and it is found that the functionality of bentonite can be increased by increasing total surface area of the clay. Due to high cation exchangeability of bentonite, various cations can be incorporated into it. After purification and modification, the absorbent aluminum phyllosilicate bentonite clay can be used as an efficient catalyst in various types of catalytic reactions. Moreover, bentonite clay can be applied in various field like drilling, civil engineering, agriculture and water treatment.

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膨润土改性及其应用综述

膨润土是最古老的粘土之一，人类自古以来就将其作为传统习惯和疗法。由于膨润土具有多种理化性质，近年来研究人员发现了它的许多应用。本文研究了膨润土的各种理化性质，如比表面积、吸附性能、溶胀性能、阳离子交换性能等。研究了壳聚糖/银基复合膨润土、铁改性膨润土、羟基铁柱型膨润土、有机膨润土、亲有机粘土、芳烃磺酸功能化膨润土、Nb2O5改性膨润土的各种改性工艺。研究表明，膨润土与蒙脱土结构相似，具有较大的比表面积，增加粘土的总比表面积可以提高膨润土的功能。由于膨润土具有较高的阳离子交换性，各种阳离子都可以掺入其中。经提纯改性后的吸附性叶硅酸铝膨润土可作为高效催化剂用于各种类型的催化反应。此外，膨润土可应用于钻井、土木工程、农业和水处理等各个领域。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Reviews in Inorganic Chemistry 化学-分析化学

CiteScore

7.30

自引率

4.90%

发文量

审稿时长

1 months

期刊介绍： Reviews in Inorganic Chemistry (REVIC) is a quarterly, peer-reviewed journal that focuses on developments in inorganic chemistry. Technical reviews offer detailed synthesis protocols, reviews of methodology and descriptions of apparatus. Topics are treated from a synthetic, theoretical, or analytical perspective. The editors and the publisher are committed to high quality standards and rapid handling of the review and publication process. The journal publishes all aspects of solid-state, molecular and surface chemistry. Topics may be treated from a synthetic, theoretical, or analytical perspective. The editors and the publisher are commited to high quality standards and rapid handling of the review and publication process. Topics: -Main group chemistry- Transition metal chemistry- Coordination chemistry- Organometallic chemistry- Catalysis- Bioinorganic chemistry- Supramolecular chemistry- Ionic liquids