PPy-MODIFIED ELECTRODE ENHANCING MFC-DRIVEN ELECTROKINETIC REMEDIATION OF URANIUM CONTAMINATED SOIL
To investigate the performance of polypyrrole(PPy)modified electrodes in enhancing the electrokinetic remediation of uranium contaminated soil driven by a microbial fuel cell(MFC),PPy was used to modify the carbon felt electrodes,to investigate the effect of different ratios of PPy modified electrode on the electrical production performance of MFC,as well as the electrokinetic remediation performance on uranium contaminated soil.The results showed that the PPy-modified electrodes enhanced the power generation performance of MFC.The maximum voltage of CP 100 reached 164 mV,and the maximum power density was 18.92 mW/m2,which was 29.13％and 43.12％higher than the original carbon felt electrodes,respectively;PPy,as an MFC cathode,enhanced the removal of uranium from soil,and the adsorption rate of uranium in CP50 was about 13 times higher than that in the original carbon felt electrode;MFC,as a power source,effectively drove the migration of uranium from the anode to the cathode in the soil.The maximum removal rate of uranium near the anode of the CP50 experimental group was as high as 56.42％.PPy-modified electrodes can significantly enhance the power generation capacity of microbial fuel cells and uranium removal.
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