Study on a microbial fuel cell with PMo12-rGO-PAN modified anode for perchlorate wastewater treatment
The anode of microbial fuel cell(MFC)was modified by phosphomolybdic acid(PMo12)-reduced graphene oxide(rGO)-polyaniline(PAN),and a single-chamber air cathode MFC was constructed.The material structure,the morphology of the modified anode,the electrochemical characteristics,electric generation characteristics and perchlorate removal performance of MFC were investigated.The mechanism of improving MFC performance was also discussed.The results showed that PMo12-rGO-PAN modified anode had more electrochemically active sites than blank anode.The MFC cyclic voltammetry closed curve area and exchange current density were increased by 2.34 and 9.36 times,respectively,and the charge transfer resistance was reduced by 85.87％.At 560 mg/L perchlorate,the maximum output voltage of the anode MFC was 160.03 mV.During operation,the reduction rate of perchlorate by MFC was always higher than that of blank anode.The anode improved the performance of MFC by improving the adhesion conditions of microorganisms and increasing the anode electron transfer rate.
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