Applied Chemical Engineering

Study of the processes of sorption and ion exchange of bentonite clays of Georgia

Zurab Megrelishvili

Department of Technology and Engineering Management, Technologies Faculty, Batumi Shota Rustaveli State University,Batumi, 6010, Georgia

Ibraim Didmanidze

Department center of languages and information technologies, Exact Science and Education Faculty, Batumi Shota Rustaveli State University, Batumi, 6010, Georgia

Nino Dondoladze

Department of Technology and Engineering Management, Technologies Faculty, Batumi Shota Rustaveli State University,Batumi, 6010, Georgia

Teimuraz Jojua

Department of Engineering and Construction, Technologies Faculty, Batumi Shota Rustaveli State University, Batumi, 6010, Georgia

Lela Bestaeva

Department of Oil and Gas Technologies, Faculty of Mining and Geology, Georgian Technical University, Tbilisi, 0160, Georgia

David Chkhubiani

Department of Hydraulics and Civil Engineering, Faculty of Civil Engineering, Georgian Technical University, Tbilisi, 0160, Georgia

DOI: https://doi.org/10.59429/ace.v8i1.5628

Keywords: Na-bentonite clay; sorption; ions exchanged capacity; ion exchange coefficient; water treatment

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Abstract

For rational use of natural resources and address environmental issues, it is necessary to create new or modernize existing technological processes One such resource is bentonite clay, but there is practically no information on its use in water treatment processes. It should be noted that bentonites differ from each other depending on their deposit. Therefore, when using them, it is necessary to conduct research according to their field of application. Studied was the process of sorption by bentonite clay (on the example of Ascanite clay of Georgia), which showed that it can be used as an ion exchanger. Established was the total exchange capacity of clay, which was 500 g-eq/m3 (wet cation exchanger) (100 meq/100g of clay). Determined was experimentally the exchange coefficient of Ca-Na ions on clay, which amounted to 1.59 m3/m3 (wet cation exchanger/water). To check the confidence of the obtained value of the ion exchange coefficient, the Pearson criterion was used. It showed that the obtained value describes the ongoing technological process with more than 95% reliability. When calculating the Pearson criterion, a developed new method for determining the number and length of grouping intervals was used.

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