Electrode (Pd/Ti) -Microbe reductive dechlorination of pentachlorophenol under anaerobic condition

The Pd/Ti electrode was prepared by coating with Pd on the surface of a Ti electrode at stable electric potential, and the reduction of pentachlorophenol (PCP) dechlorination was studied in an electro-biological system composed of the Pd/Ti electrode and the anaerobic microbes. The results showed that when the potential in the electro-biological system was -1.3V, the current density increased to the largest value which was 0.0014 A, and the efficiency of the electron transfer was higher. The efficiency of the PCP dechlorination in the electro-biological system was greater than that in single biological system by 23.3%, and the dechlorination of microbial respiration is the internal impetus during the dechlorination of PCP in the electro-microbe system. Electron transport chain of microbial respiration coupled with the hydrogen supply of the electric field, which resulted in the interaction of the electric field and biological enzyme, and the electric field in the anaerobic microbial degradation accelerated the reductive dechlorination of the PCP.