Gupta, Goutam Kishore and Kandulna, Nelson and Talukdar, Pooja and Geed, Sachin Rameshrao (2026) Adsorptive Removal of Cr(VI) from Aqueous Solution using Zinc Aluminate Spinel. In: 2nd International Conference on Advances in Chemical and Material Sciences (ACMS-2026), 12-14 April, 2026, Jadavpur University, Kolkata. (Submitted)

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Abstract

Cr(VI) being a carcinogenic in nature poses significant health hazards like breathing issue, skin irritation etc. However, being an important chemical for the many industries like electroplating, pigment, leather tanning etc. it’s discharge to the environment has several regulations and thus its removal becomes an important issue. In this regard, the present study elaborates the synthesis and application of zinc aluminate spinel for the abatement of Cr(VI) from the aqueous solution. The zinc aluminate spinel precursor gel was synthesized by wet chemical route and further calcined at 1000 °C to derive the Zinc aluminate spinel powder which was confirmed by XRD analysis. The batch study adsorption experiments were performed varying the pH of the solution, adsorption dose, solution concentration, time etc. The surface characteristics of zinc aluminate spinel before and after adsorption were evaluated by point of zero charge (pHzpc), Fourier Transform Infrared spectroscopy, BET surface area, SEM-EDS, XRD, and XPS analysis. Some of the chemical bonds like C-H, O-H, C-O, and C=O were accountable for the abatement process, and further alteration in the oxidation state for Cr was asserted by XPS analysis. Kinetics, thermodynamics, mass transfer and proposed reaction mechanism was also analyzed using the adsorption results. The study proposed adsorption to be governed by complexation by functional groups present on the adsorbent, physical & electrostatic attraction and via reduction as well. Therefore, the results underpin that the zinc aluminate is an adequate and effective adsorbent for the abatement of Cr(VI). Keywords: Adsorption; Kinetics; Mass-transfer, Mechanism

Item Type:	Conference or Workshop Item (Lecture)
Uncontrolled Keywords:	Adsorption; Kinetics; Mass-transfer, Mechanism
Subjects:	Basic Science
Divisions:	Fuel Cell and Battery
Depositing User:	Ms Upasana Sahu
Date Deposited:	23 Sep 2026 09:05
Last Modified:	23 Sep 2026 09:05
URI:	https://cgcri.csircentral.net/id/eprint/5820

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