Multifunctional nanohybrid for simultaneous detection and removal of Arsenic(III) from aqueous solutions

Singh, S and Khasnabis, S and Anil, AG and Kumar, V and Kumar Naik, TS and Nath, B and Garg, VK and Singh, J and Ramamurthy, PC (2022) Multifunctional nanohybrid for simultaneous detection and removal of Arsenic(III) from aqueous solutions. In: Chemosphere, 289 .

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Abstract

Herein, for the adsorption and detection of As (III), multifunctional nanohybrid have been synthesized using a solvothermal approach. Structural and functional characterizations confirmed the impregnation of the ZnO over graphene oxide. Nanohybrid exhibits a remarkable qmax (maximum adsorption capacity) of 8.17 mg/g, at an adsorbent dose of 3 g/L and pH of 8.23. Higher adsorption with nanohybrid was attributed to a large BET surface area of 32.950 m2/g. The chemical nature and adsorption behaviour of As(III) on ZnO-GO were studied by fitting the data with various adsorption isotherms (Langmuir & Freundlich) and kinetics models (six models). It is observed from the findings that removal of As(III) with ZnO-GO nanocomposite appears to be technically feasible with high removal efficiency. The feasibility of the nanocomposite to function as a sensor for the detection of As(III) was also evaluated. The fabricated sensor could detect As(III) with a lower limit of detection of 0.24 μM and linear range up to 80 μM. Overall, this study is significant in nanohybrid as a multifunctional composite for the adsorption and detection of As (III) from wastewater. © 2021 Elsevier Ltd

Item Type:	Journal Article
Publication:	Chemosphere
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Elsevier Ltd
Keywords:	Adsorption; Adsorption isotherms; Graphene; II-VI semiconductors; Nanocomposites, Arsenic(III); As(III) removal; Nanohybrids; Removal of arsenics; Sensing study; Simultaneous detection; Simultaneous removal; Solvothermal approach; Synthesised; ZnO-GO nanocomposite, Zinc oxide, adsorption; aqueous solution; arsenic; detection method; nanocomposite; reaction kinetics; sensor; surface area
Department/Centre:	Division of Interdisciplinary Sciences > Interdisciplinary Centre for Energy Research Division of Interdisciplinary Sciences > Interdisciplinary Centre for Water Research Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	06 Jan 2022 06:15
Last Modified:	06 Jan 2022 06:15
URI:	http://eprints.iisc.ac.in/id/eprint/70799

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