Green synthesis of a potential magnetic and mesoporous EG-nZVI/CA-MCM41 nanocomposite for reductive sorption of europium

Ananya Jena; Biswanath Mahanty; Deepmoni Deka; Prasanta Kumar Sahoo; Sanghamitra Pradhan; Prangya Ranjan Rout; Sujata Mishra; Naresh Kumar Sahoo

doi:10.1039/D3EN00785E

Green synthesis of a potential magnetic and mesoporous EG-nZVI/CA-MCM41 nanocomposite for reductive sorption of europium†

Ananya Jena,

^a Biswanath Mahanty,

^b Deepmoni Deka,^c Prasanta Kumar Sahoo,

^d Sanghamitra Pradhan,

^a Prangya Ranjan Rout,^e Sujata Mishra^a and Naresh Kumar Sahoo

*^a

Author affiliations

* Corresponding authors

^a Department of Chemistry, Environmental Science Program, (ITER), Siksha ‘O’ Anusandhan (Deemed to be University), Bhubaneswar-751030, Odisha, India
E-mail: nareshsahoo@soa.ac.in

^b Division of Biotechnology, Karunya Institute of Technology and Sciences, Coimbatore, India

^c Center for the Environment, Indian Institute of Technology Guwahati, India

^d Environmental Hydrology Division, National Institute of Hydrology, Jalvigyan Bhawan, Roorkee 247667, India

^e Department of BioTechnology, Dr B R Ambedkar National Institute of Technology Jalandhar, India

Abstract

Europium is the “rarest” rare-earth element in the earth's crust. Nanocomposite-mediated adsorptive extraction of europium is very promising due to its cost-effectiveness and environmental acceptability. A newfangled ethylene glycol nano zerovalent iron supported citric acid modified MCM41 (EG-nZVI/CA-MCM-41) nanocomposite was synthesized employing green tea extracts. The structural and morphological characterization of the prepared nanomaterials was carried out by XRD, FTIR, XPS, FE-SEM, and EDS analysis. Under optimal conditions (i.e., pH 5.2, 40 °C), the nanocomposite could remove 91.5% Eu(III) from an initial dose of 750 mg L⁻¹, yielding an extraordinarily high sorption capacity of 714.28 mg g⁻¹. While the best fit Freundlich isotherm (R²: 0.955) suggests monolayer adsorption, the kinetic analysis indicates a chemisorption process. Rapid adsorption through electrostatic interaction followed by reduction at the nZVI surface could be the mechanism for Eu(III) removal. The green synthesized nanocomposite also has significant reusability capacity for up to 3 consecutive cycles.

This article is part of the themed collection: Environmental Science: Nano Recent HOT Articles

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DOI: https://doi.org/10.1039/D3EN00785E
Article type: Paper
Submitted: 01 Nov 2023
Accepted: 27 Jan 2024
First published: 31 Jan 2024

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Environ. Sci.: Nano, 2024,11, 855-869

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Green synthesis of a potential magnetic and mesoporous EG-nZVI/CA-MCM41 nanocomposite for reductive sorption of europium

A. Jena, B. Mahanty, D. Deka, P. K. Sahoo, S. Pradhan, P. R. Rout, S. Mishra and N. K. Sahoo, Environ. Sci.: Nano, 2024, 11, 855 DOI: 10.1039/D3EN00785E

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Environmental Science: Nano

Green synthesis of a potential magnetic and mesoporous EG-nZVI/CA-MCM41 nanocomposite for reductive sorption of europium†

Abstract

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Green synthesis of a potential magnetic and mesoporous EG-nZVI/CA-MCM41 nanocomposite for reductive sorption of europium

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