Cathodic reduction of hexavalent chromium [Cr(VI)] coupled with electricity generation in microbial fuel cells.
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/m(2) (0.04 mA/cm(2)) 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.
Wang
Gang
G
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.
Huang
Liping
L
Zhang
Yifeng
Y
D001674:Bioelectric Energy Sources; D019149:Bioreactors / Q000382:microbiology*; D002857:Chromium / Q000737:chemistry*; D004560:Electricity; D004563:Electrochemistry; D010084:Oxidation-Reduction
D002857:Chromium; C074702:chromium hexavalent ion