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IN SITU ELECTROKINETIC REMEDIATION OF TOXIC METAL-CONTAMINATED SOIL DRIVEN BY SOLID PHASE MICROBIAL FUEL CELLS WITH A WHEAT STRAW ADDITION
Song, T.-S., J. Zhang, S. Hou, H. Wang, D. Zhang, S. Li, and J. Xie.
Journal of Chemical Technology & Biotechnology 93(10):2860-2867(2018)

This preliminary study illustrates how a solid-phase microbial fuel cell (SMFC) can drive the in situ electrokinetic (EK) remediation of toxic metal-contaminated soil. SMFCs with different concentrations of wheat straw, used in several configurations, were tested and compared. The SMFCs were used to drive the electromigration of Pb and Zn in contaminated soil, and their removal efficiency gradually increased with the straw ratio. After operating for 100 days, the removal efficiencies for Pb and Zn were 37.2% and 15.1%, respectively, in the anode region of the SMFC with 3% straw. Analysis of Pb and Zn fractions after the SMFC treatments using a sequential extraction method illuminated different distributions of the Pb and Zn fractions in the soil, indicating variations in removal efficiency.



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