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

2011 International Symposium on Water Resource and Environmental Protection Pub Date : 2011-05-20 DOI:10.1109/ISWREP.2011.5893659

Zhanping Cao, Jingli Zhang

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Abstract

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.

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电极(Pd/Ti) -微生物在厌氧条件下还原脱氯五氯苯酚

在稳定电势下，在Ti电极表面涂覆Pd，制备了Pd/Ti电极，并在Pd/Ti电极与厌氧微生物组成的电生物系统中研究了五氯酚(PCP)脱氯的还原。结果表明，当电-生物系统电位为-1.3V时，电流密度最大，为0.0014 A，电子传递效率较高。电-微生物系统对PCP的脱氯效率比单一生物系统高23.3%，微生物呼吸的脱氯作用是电-微生物系统中PCP脱氯的内在动力。微生物呼吸的电子传递链与电场的供氢耦合，导致电场与生物酶相互作用，厌氧微生物降解中的电场加速了PCP的还原性脱氯。

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2011 International Symposium on Water Resource and Environmental Protection

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