Nickel ion removal from wastewater using the microbial electrolysis cell.
Bioresource Technology(2012)
摘要
In this study, the microbial electrolysis cell (MEC) was examined for treatment of wastewater containing nickel ion (Ni(2+)). Effects of initial Ni(2+) concentrations in catholyte, pH values of catholyte, and applied voltages on MEC performance were determined. Results showed that the Ni(2+) removal efficiency with the MEC was three times higher than those with an electrolysis cell and a microbial fuel cell. Ni(2+) removal efficiencies decreased from 99 ± 0.6% to 33 ± 4.2% with the initial Ni(2+) concentrations from 50 to 1000 mg/L, while the mass removal of Ni(2+) increased consistently with the initial concentrations. Ni(2+) removal efficiencies in the MEC increased from 51 ± 4.6% to 67 ± 5.3% with the applied voltages from 0.5 to 1.1 V. These results demonstrate that the MEC can be an alternative process to effectively remove Ni(2+) from wastewater.
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关键词
Microbial electrolysis cell,Nickel removal,Wastewater treatment,Electrolysis
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