Chakraborty, Adwitiya and Sinha, Prasanta Kumar and Naskar, Milan Kanti (2023) Low Temperature Processing of Iron Oxide Nanoflakes from Red Mud Extract toward Favorable De-arsenification of Water. ACS Omega, 8 (32). pp. 29281-29291. ISSN 2470-1343

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Abstract

Iron oxide (Fe2O3) wassynthesizedfrom red mud extract followed by hydrothermal reaction at 150 & DEG;C/6-24h in the presence of NH4OH. The crystallinity of Fe2O3 increased with reaction time as confirmed byX-ray Diffraction, while Fourier transform infrared spectroscopy andRaman illustrate the symmetric stretching vibration of the Fe-Obond in Fe2O3. The X-ray photoelectronspectroscopic analysis shows O 1s spectra at 530.6, 531.2, and 532eV, signifying the lattice oxygen in Fe-O, surface oxygen defects,and oxygen in adsorbed hydroxyl groups, respectively. The morphologyof Fe2O3 nanoflakes was noticed fromfield emission scanning electron microscopy and transmission electronmicroscopy. The developed particles reveal the BET surface area inthe range of 136-347 m(2)/g. The maximum As(V) adsorptioncapacity of 32-41 mg/g was obtained for adsorbent dose of 0.25g/L. The arsenic level could be lowered down to 2-3 g/L(<10 g/L as per WHO's limit) with contaminated realwater (64 g/L) using 0.25 g/L of sample dose within 5 min of adsorption.

Item Type:	Article
Subjects:	Environment and Pollution
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	13 Oct 2023 09:06
Last Modified:	13 Oct 2023 09:06
URI:	http://cgcri.csircentral.net/id/eprint/5629

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