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- Title
Bioreduction of [Co(III)-EDTA]<sup>−</sup> by Denitrifying Granular Sludge Biofilms.
- Authors
Reddy, Gangidi Kiran Kumar; Nancharaiah, Yarlagadda V.; Mohan, Tulasi V. Krishna
- Abstract
Cobalt-60 is a by-product formed in the nuclear and defense-related industries. Bioreduction of stable [Co(III)-EDTA]− to the less stable [Co(II)-EDTA]2− constitutes a bioremediation approach. Bioreduction of [Co(III)-EDTA]− by a denitrifying microbial community was studied. Denitrifying granular sludge cultivated in a bioreactor exhibited efficient [Co(III)-EDTA]− reduction. Fed-batch experiments showed repeated reduction of [Co(III)-EDTA]− without loss of microbial activity. Bioreduction of [Co(III)-EDTA]− was accelerated in the presence of anthraquinone-2,6-disulfonate. Simultaneous reduction of both nitrate and [Co(III)-EDTA]− was observed, but denitrification was delayed in the presence of [Co(III)-EDTA]−. Microbial reduction in the presence of excess nitrate and acceleration by an electron shuttle has practical implications in cobalt bioremediation.
- Subjects
COBALT; DENITRIFYING bacteria; BACTERIA; DENITRIFICATION; MICROBIAL remediation
- Publication
Chemical Engineering & Technology, 2016, Vol 39, Issue 9, p1669
- ISSN
0930-7516
- Publication type
Article
- DOI
10.1002/ceat.201500488