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Removal of chromium [Cr(VI)] from contaminated solutions by using biogenic ferrous iron in bioreduced minerals

Title
Removal of chromium [Cr(VI)] from contaminated solutions by using biogenic ferrous iron in bioreduced minerals
Author
전병훈
Keywords
bioreduction; goethite; hematite; nontronite
Issue Date
2014-06
Publisher
The Korean Society of Mineral and Energy Resources Engineers
Citation
Geosystem Engineering,17(2),p.95-103
Abstract
Abiotic reduction of Cr(VI) by ferrous iron was investigated in the presence of bioreduced goethite, hematite and two types of nontronites (NAU-1 and NAU-2). Bioreduction experiments were performed with structural Fe(III) in the minerals as sole electron acceptor, lactate as sole electron donor, Shewanella putrefaciens CN32 cells as a mediator and anthraquinone-2,6-disulfate (AQDS) was added as an electron shuttle. The results showed that bioreduction of Fe(III) occurred in all the studied minerals and the reduction increased with the application of AQDS. The maximum (21%) and minimum (3%) bioreduction of Fe(III) occurred in the nontronite (NAU-2) and hematite, respectively. The removal of Cr(VI) for all studied minerals was increased with decreasing pH. Most of the abiotic reduction of Cr(VI) by biogenic Fe(II) at pH 7 was observed in the bioreduced NAU-2 treatment with a maximum efficiency about 75%.
URI
http://www.tandfonline.com/doi/full/10.1080/12269328.2014.928239http://hdl.handle.net/20.500.11754/56137
ISSN
1226-9328; 2166-3394
DOI
10.1080/12269328.2014.928239
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > EARTH RESOURCES AND ENVIRONMENTAL ENGINEERING(자원환경공학과) > Articles
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