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Effect of complexing agents on reduction of Cr(VI) by Desulfovibrio vulgaris ATCC 29579
Author(s) -
Mabbett Amanda N.,
Lloyd Jon R.,
Macaskie Lynne E.
Publication year - 2002
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.10361
Subject(s) - desulfovibrio vulgaris , chelation , chemistry , ionic strength , redox , bioremediation , desulfovibrio , ligand (biochemistry) , nuclear chemistry , inorganic chemistry , anaerobic exercise , sulfate , biochemistry , bacteria , receptor , organic chemistry , biology , aqueous solution , physiology , genetics
The reduction of Cr(VI) at the expense of molecular hydrogen was studied using resting cells of Desulfovibrio vulgaris ATCC 29579 in anaerobic resting cell suspensions in MOPS buffer. Bioreduction occurred only in the presence of ligands or chelating agents (CO 3 2− , citrate, NTA, EDTA, DTPA). The stimulatory effect of these ligands on the rate of Cr(VI) reduction was correlated ( r = 0.988) with the strength of the ligand/chelate complex of Cr(III). The data are examined with respect to likely solution and redox equilibria in the ionic matrix of the carrier solution, and with respect to the potential for bioremediation of Cr(VI). © 2002 Wiley Periodicals, Inc. Biotechnol Bioeng 79: 389–397, 2002.