Biodegradation Of Toc By Nano-Fe2o3 Modified Smfc And Its Potential Environmental Effects**

In this paper, sediment microbial fuel cell (SMFC) with nano-Fe2O3 modified anode was investigated to enhance in-situ remediation. Results showed that the modification led to higher removal of total organic matter (TOC) after 50 days. Anodic microbial community was further analyzed. It was found that the decrease of relative abundance of exoelectrogens and the suppression of methanogens led to the reduction of the power generation in SMFC with modified anode. Longilinea was one of key bacteria regarding TOC degradation. Besides, potential environmental effects resulting from SMFC and nano-Fe2O3 modification were also discussed. The competition of exoelectrogens with methanogens for nutrient potentially resulted in the reduction of methane emission. The SMFC system could inhibit the growth of fecal bacteria and the nano-Fe2O3 modified anode had stronger inhibitory effect, which further reduce the risks induced by fecal bacteria to human health. The modification could further maintain the biodiversity of eucaryon and achieve higher ecosystem stability.