Kinetics during the redox biotransformation of pollutants mediated by immobilized and soluble humic acids

Applied Microbiology and Biotechnology
Francisco J CervantesSonia Arriaga

Abstract

The aim of this study was to elucidate the kinetic constraints during the redox biotransformation of the azo dye, Reactive Red 2 (RR2), and carbon tetrachloride (CT) mediated by soluble humic acids (HAs) and immobilized humic acids (HAi), as well as by the quinoid model compounds, anthraquinone-2,6-disulfonate (AQDS) and 1,2-naphthoquinone-4-sulfonate (NQS). The microbial reduction of both HAs and HAi by anaerobic granular sludge (AGS) was the rate-limiting step during decolorization of RR2 since the reduction of RR2 by reduced HAi proceeded at more than three orders of magnitute faster than the electron-transferring rate observed during the microbial reduction of HAi by AGS. Similarly, the reduction of RR2 by reduced AQDS proceeded 1.6- and 1.9-fold faster than the microbial reduction of AQDS by AGS when this redox mediator (RM) was supplied in soluble and immobilized form, respectively. In contrast, the reduction of NQS by AGS occurred 1.6- and 19.2-fold faster than the chemical reduction of RR2 by reduced NQS when this RM was supplied in soluble and immobilized form, respectively. The microbial reduction of HAs and HAi by a humus-reducing consortium proceeded 1,400- and 790-fold faster than the transfer of electrons from red...Continue Reading

References

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Oct 26, 2005·Environmental Science & Technology·Ruey-An Doong, Huai-Chih Chiang
Nov 22, 2005·Environmental Science & Technology·Irina V PerminovaValery S Petrosyan
Jun 13, 2008·Environmental Science & Technology·Jie Jiang, Andreas Kappler
Apr 4, 2009·Journal of Hazardous Materials·Wang JingYang Fenglin
Jun 9, 2009·Biotechnology Advances·Frank P Van der Zee, Francisco J Cervantes
Feb 9, 2010·Environmental Science & Technology·Francisco J CervantesJ Rene Rangel-Mendez
Aug 11, 2010·FEMS Microbiology Ecology·Christian PennyFrançoise Bringel
Apr 22, 2011·Applied Microbiology and Biotechnology·Guangfei LiuHong Lv
Sep 2, 2011·Journal of Hazardous Materials·Francisco J CervantesLilia Montoya-Lorenzana
Dec 14, 2011·Applied Microbiology and Biotechnology·Luis H Alvarez, Francisco J Cervantes
Feb 9, 2012·Biodegradation·Claudia M MartínezFrancisco J Cervantes

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Citations

Mar 30, 2013·World Journal of Microbiology & Biotechnology·Guangfei LiuHong Lv
Sep 10, 2013·Applied Microbiology and Biotechnology·Claudia M MartínezFrancisco J Cervantes
Nov 14, 2013·Applied Microbiology and Biotechnology·Claudia M MartinezFrancisco J Cervantes
Sep 1, 2016·Journal of Environmental Management·Luis H AlvarezAlicone García-González
Mar 16, 2017·Environmental Science. Processes & Impacts·Lin WangYu Yang
Jan 9, 2019·Environmental Science and Pollution Research International·Dongyang LiZhifei Ma
Jun 3, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Natalia A Kulikova, Irina V Perminova

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