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Environmental Engineering Research 2022;27(6): 210104 DOI: https://doi.org/10.4491/eer.2021.104
Hybrid materials precursor to natural bentonite in the decontamination of Alizarin Yellow from aqueous solutions
Ralte Malsawmdawngzela1, Sarikokba 1, Thanhmingliana 2, Diwakar Tiwari1  , and Seung Mok Lee3
1Department of Chemistry, School of Physical Sciences, Mizoram University, Aizawl-796004, India
2Department of Chemistry, Pachhunga University College, Mizoram University, Aizawl-796001, India
3Department of Environmental Engineering, Catholic Kwandong University, Gangneung 25601, Republic of Korea
Corresponding Author: Diwakar Tiwari ,Tel: +91-9862323015, Fax: +91-389-2330834, Email: diw_tiwari@yahoo.com
Received: February 26, 2021;  Accepted: November 17, 2021.
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ABSTRACT
The present study aims to investigate the insights of Alizarin Yellow removal by hybrid materials precursor to natural bentonite. The hybrid materials employed are bentonite modified with hexadecyltrimethylammonium bromide (HDTMA) (BnH) and aluminium pillared HDTMA bentonite (BnAH). Surface morphology of materials are obtained with scanning electron microscopy-Energy dispersive X-ray analysis (SEM-EDX). The batch reactor operations conducted in the removal of Alizarin Yellow by these solids for various parametric studies which enabled to deduce the mechanism involved at solid/solution interface. Sorption capacity and selectivity was increased significantly using hybrid materials in the removal of AY. Hybrid materials showed very high removal capacity of AY and apparently unaffected at varied pH (4.0−10.0) and sorptive concentrations 1.0 to 25.0 mgL-1. Kinetic studies indicated that an apparent equilibrium occurred within 5–10 min of contact and the kinetic data was better fitted to the pseudo-second-order kinetic model. The percent removal of AY was not affected by increasing the background electrolyte (NaCl) concentration to 0.1 molL-1 and in presence of several co-existing ions. It is revealed that the hybrid materials are found more organophilic and AY molecule bound with strong forces at the surface of hybrid materials.
Keywords: Alizarin Yellow | Hybrid materials | Organophilic materials | Pillared materials | Sorption mechanism | Strong bonding
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