Modification of bentonite clay & its applications: a review

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...

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Bibliographic Details
Published inReviews in inorganic chemistry (London, England) Vol. 42; no. 3; pp. 265 - 282
Main Authors Borah, Debasis, Nath, Harshajit, Saikia, Hemaprobha
Format Journal Article
LanguageEnglish
Published Berlin De Gruyter 27.09.2022
Walter de Gruyter GmbH
Subjects
adsorption
Agricultural engineering
Aluminum
Bentonite
bentonite clay
Cation exchanging
Chemical properties
Chitosan
Clay
drug delivery
incorporation
Inorganic chemistry
Levees & battures
modifications
Montmorillonite
Niobium oxides
purification
Scrap
Silver
Surface area
swelling property
Water treatment
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Summary: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 Nb . 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.
ISSN:0193-4929
2191-0227
DOI:10.1515/revic-2021-0030