Removal of Chloramphenicol and Simultaneous Electricity Generation by Using Microbial Fuel Cell Technology

Abstract

The release of antibiotics into aquatic environments and its related long-term side effects have attracted great attention. As one of the most commonly used antibiotics in China, nitroaromatic antibiotic chloramphenicol (CAP) can be detected in aquatic environments. CAP removal efficiency in the anode chamber of microbial fuel cell (MFC) and the effect of CAP on the electricity output of MFC were studied in this paper. As compared to control experiments including open circuit MFC, no extra carbon source MFC, and abiotic MFC, the removal efficiency of CAP in normal MFC was the most outstanding. However, as the concentration of CAP increased, the removal efficiency is on the decline which is attributed to the CAP load increased. At an initial concentration lower than 30 mg L-1, the electroactive biofilm-based MFC is robust with more than 95% voltage output maintained, but the voltage output dropped dramatically in antibiotic concentrations higher than 50 mg L-1. An exponential relationship was found between the inhibition ratios of the MFC and the CAP concentrations in the studied concentration range. The findings about the CAP removal and the effects of CAP on the electricity output in two-chambered MFC in this work would have great importance to practical antibiotics wastewater treatment.