Mechanism of electron transfer in the bioadsorption of hexavalent chromium within Leersia hexandra Swartz granules by X-ray photoelectron spectroscopy

Journal of Hazardous Materials
Jianping LiXuehong Zhang

Abstract

Leersia hexandra Swartz biogranules were used to adsorb Cr(VI) from aqueous solutions. Batch biosorption experiments showed that the Cr(VI) concentration sharply decreases in the first 15 min. The main functional groups that may be involved in chromium sorption were determined using Fourier transform infrared spectroscopy. The use of X-ray photoelectron spectroscopy confirmed the reduction of Cr(VI) to Cr(III) through L. hexandra Sw. Results indicate that Cr(III) is the dominant species on the surface of the biogranules and that the redox reaction can be accomplished within 40 min. The mechanism of electron transfer during Cr(VI) reduction to Cr(III) was investigated. Protonation of the oxygen-containing groups produces electrostatic-sorption power over Cr(VI). The nitrogen-containing groups serve as the electron-donor groups in the process of reduction-sorption. Moreover, after the complete reduction of Cr(VI), the pH of the suspension significantly increases.

References

Jan 14, 2003·Environmental Science & Technology·Laurent DupontMichel Aplincourt
Oct 19, 2004·Environmental Science & Technology·Donghee ParkJong Moon Park
Feb 15, 2005·Water Research·Donghee ParkJong Moon Park
Sep 13, 2005·Bioresource Technology·Vikrant Sarin, K K Pant
Jan 2, 2007·Journal of Hazardous Materials·Xu HanNora Fung Yee Tam
Jan 9, 2007·Chemosphere·Xue-Hong ZhangDun-Qiu Wang
Aug 11, 2007·Bioresource Technology·M G A VieiraM G C Silva
Oct 16, 2007·Journal of Colloid and Interface Science·Donghee ParkJong Moon Park
Oct 20, 2007·Bioresource Technology·Núria FiolIsabel Villaescusa
Mar 18, 2008·Journal of Environmental Management·Xue Song WangSheng Rong Tao
Oct 22, 2008·Journal of Hazardous Materials·Virendra Kumar Mishra, B D Tripathi

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Citations

Mar 19, 2013·Journal of Hazardous Materials·Nataliya ZaitsevaAlain Walcarius
Jan 11, 2011·Journal of Hazardous Materials·Haojie CuiMing Kuang Wang
Feb 8, 2018·Environmental Science and Pollution Research International·Li-Juan PangGuo-Zhong Wu

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