Cathodic reduction of hexavalent chromium [Cr(VI)] coupled with electricity generation in microbial fuel cells
- 1.2k Downloads
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.
KeywordsCr(VI) reduction Electron acceptor Microbial fuel cell Power density
This research was supported by the Scientific Research Foundation of the Ministry of Education for the Returned Overseas Chinese Scholars [2004–527] and the Key Laboratory of Industrial Ecology and Environmental Engineering of the Ministry of Education of China.
- American Public Health Association, American Water Works Association, Water Pollution Control Federation (1998) Standard methods for the examination of water and wastewater, 20th edn. American Public Health Association, WashingtonGoogle Scholar
- Huang LP, Logan BE (2008) Electricity generation and treatment of paper recycling wastewater using a microbial fuel cell. Appl Microbiol Biotechnol. doi: 10.1007/s00253-008-1546-7
- Wang XS, Li ZZ, Tao SR (2008) Removal of chromium (VI) from aqueous solution using walnut hull. J Environ Manage. doi: 10.1016/j.jenvman.2008.01.011