Biochar as an electron shuttle for reductive dechlorination of pentachlorophenol by Geobacter sulfurreducens.
Biochar as an electron shuttle for reductive dechlorination of pentachlorophenol by Geobacter sulfurreducens.
复制标题
生物炭作为电子穿梭，用于硫还原地杆菌对五氯苯酚的还原脱氯
DOI：
10.1038/srep16221
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发表时间：
2015-11-23
影响因子：
4.6
通讯作者：
Zhou S
中科院分区：
文献类型：
--
作者：
Yu L;Yuan Y;Tang J;Wang Y;Zhou S
为了解生物炭对环境污染物生物还原的影响，研究了不同生物炭存在下，硫还原锗对五氯苯酚（PCP）的还原脱氯作用.结果表明，生物炭显著促进了细胞向PCP的电子传递，从而促进了PCP的还原脱氯。生物炭在这一过程中的促进作用（高达24倍）取决于其电子交换容量（EEC）和电导率（EC）。动力学模型表明，在900 °C下，生物炭的表面氧化还原活性部分（RAM）和EC分别贡献了56%和41%的生物降解速率。研究结果表明，生物炭是五氯苯酚脱氯的有效电子介质，其EC和RAM在电子传递过程中起着重要作用。
The reductive dechlorination of pentachlorophenol (PCP) by Geobacter sulfurreducens in the presence of different biochars was investigated to understand how biochars affect the bioreduction of environmental contaminants. The results indicated that biochars significantly accelerate electron transfer from cells to PCP, thus enhancing reductive dechlorination. The promotion effects of biochar (as high as 24-fold) in this process depend on its electron exchange capacity (EEC) and electrical conductivity (EC). A kinetic model revealed that the surface redox-active moieties (RAMs) and EC of biochar (900 °C) contributed to 56% and 41% of the biodegradation rate, respectively. This work demonstrates that biochars are efficient electron mediators for the dechlorination of PCP and that both the EC and RAMs of biochars play important roles in the electron transfer process.