Biosorption and bioreduction of Cr(VI) by a microalgal isolate, Chlorella miniata

Journal of Hazardous Materials
Xu HanNora Fung Yee Tam

Abstract

The ability and mechanism of a microalgal isolate, Chlorella miniata to remove Cr(VI) were investigated. Kinetic studies indicated that both biosorption and bioreduction were involved in the Cr(VI) removal. The adsorbed Cr(VI) was reduced to Cr(III), and desorption studies indicated that Cr(III) occupied most of the adsorption sites on the biomass. The equilibrium time for Cr(VI) removal was dependent on various factors including initial pH, biomass and Cr(VI) concentrations. Equilibrium study showed that the Cr(VI) removal capacity was negatively related to the initial pH, and the biosorption capacity of total Cr [Cr(III) and Cr(VI)] reached the maximum at initial pH of 3.0. The spectrum of Fourier Transform Infrared Spectrometer analysis (FTIR) further confirmed that amino group on the algal biomass was the main adsorption site for Cr(VI) biosorption in acidic pH while the reduced Cr(III) was mainly sequestered by carboxylate group. The comparison between biosorption-bioreduction and direct bioreduction kinetic models proved that biosorption of Cr(VI) was the first step, followed by Cr(VI) bioreduction and Cr(III) biosorption on the algal biomass.

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Sep 12, 2006·Journal of Colloid and Interface Science·Xu HanNora Fung Yee Tam

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Citations

May 29, 2010·Applied Microbiology and Biotechnology·Giovanni ColicaRoberto De Philippis
Feb 27, 2013·Environmental Science and Pollution Research International·Yangyang WangRuiping Wu
Oct 16, 2013·Ecotoxicology and Environmental Safety·María PereiraSebastián Sánchez-Fortún
May 2, 2012·Pakistan Journal of Biological Sciences : PJBS·K V AjayanK Thirugnanamoorthy
Jun 2, 2014·Environmental Monitoring and Assessment·Erick Aranda-GarcíaEliseo Cristiani-Urbina
Jan 10, 2012·Chemosphere·Zhi ChenZiyu Wu
Aug 25, 2015·Environmental Science and Pollution Research International·Yu-Feng GongXu Han
Mar 1, 2013·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Priyankari BhattacharyaSibdas Bandyopadhyay
Feb 8, 2020·International Journal of Phytoremediation·Suman NayakParesh Kale
Nov 17, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·María Teresa Garza-GonzálezJuan Francisco Villarreal-Chiu
Aug 25, 2019·Environmental Science and Pollution Research International·Na LiFenglian Fu
Aug 8, 2019·Marine Drugs·Giorgio Maria VingianiChiara Lauritano
Nov 8, 2020·Environmental Science and Pollution Research International·Arukula DeepaBrijesh Kumar Mishra
Nov 17, 2020·Journal of Environmental Management·Pooja SinghYogesh Patil
Jan 12, 2021·Water Environment Research : a Research Publication of the Water Environment Federation·Abate AyeleRocktotpal Konwarh
Jun 3, 2021·Environmental Science and Pollution Research International·Jili ShenSili Ren

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