Cathodic reduction of hexavalent chromium [Cr(VI)] coupled with electricity generation in microbial fuel cells |
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| Authors: | Gang Wang Liping Huang Yifeng Zhang |
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| Affiliation: | (1) Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education (MOE), School of Environmental and Biological Science & Technology, Dalian University of Technology, No.2, Linggong Road, Dalian, 116024, China |
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| Abstract: | A novel approach to Cr(VI)-contaminated wastewater treatment was investigated using microbial fuel cell technologies in fed-batch mode. By using synthetic Cr(VI)-containing wastewater as catholyte and anaerobic microorganisms as anodic biocatalyst, Cr(VI) at 100 mg/l was completely removed during 150 h (initial pH 2). The maximum power density of 150 mW/m2 (0.04 mA/cm2) and the maximum open circuit voltage of 0.91 V were generated with Cr(VI) at 200 mg/l as electron acceptor. This work verifies the possibility of simultaneous electricity production and cathodic Cr(VI) reduction. |
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| Keywords: | Cr(VI) reduction Electron acceptor Microbial fuel cell Power density |
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