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Bulletin of Abai KazNPU. Series of Natural-geographical sciences

A BRIEF OVERVIEW OF MODIFIED VERMICULITE-BASED SORBENTS THAT SORB HEAVY AND RARE METAL IONS

Published March 2024

174

75

Abstract

This study discusses modified sorbents based on natural vermiculite for the purification of
water and soil contaminated with heavy and rare metals. Modification methods and sorption
properties include an analysis of the studies studied. The advantages and disadvantages are
considered. By modifying vermiculite with zirconium oxide, the sorption of nickel (II) ions by it
was studied. By purifying the mineral with hydrochloric acid and increasing its porosity, the
sorption of copper (II) ion was taken into account. By modifying vermiculite with chitosan, a
composite material was obtained and the sorption of ion (II) was studied. Although the sorption of
oil residues of the modified product due to the treatment of vermiculite with paraffin, lignosulfates
and cellulose is considered, its property of sorption of metal ions is assumed.

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