Enhanced anaerobic degradation of organic pollutants in a soil microbial fuel cell
Enhanced anaerobic degradation of organic pollutants in a soil microbial fuel cell
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土壤微生物燃料电池中有机污染物的强化厌氧降解
DOI：
10.1016/j.cej.2011.06.024
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发表时间：
2011-08-15
影响因子：
15.1
通讯作者：
Zhuang, Li
中科院分区：
文献类型：
--
作者：
Huang, De-Yin;Zhou, Shun-Gui;Zhuang, Li
有机污染物的厌氧降解通常比好氧条件下慢。为了原位修复受有机污染物污染的缺氧土壤，构建了插入式土壤微生物燃料电池（MFC），并将其插入浸水土壤中，以增强对苯酚的生物降解并同时发电。最高功率密度达到29.45 mW/m(2)，在100 ω的外部负载下获得了约140 ω的内阻。在闭路条件下，土壤MFC运行10天后，苯酚的去除率为90.1%，而在开路和非MFC条件下，苯酚的降解率分别仅为27.6%和12.3%。闭环条件下苯酚降解速率常数(k)为0.390/d，约为非mfc条件下的23倍。苯酚的降解也与可溶性COD和颗粒性COD的去除呈正相关，表明土壤MFC系统与发电耦合可以增强对涝渍土壤中有机污染物和COD的去除。该方法可以加速某些有毒有机污染物在缺氧条件下的转化或降解，对土壤修复具有重要意义。(C) 2011 Elsevier B.V.版权所有
The anaerobic degradation of organic pollutants is generally slower than under aerobic conditions. With the aim of in situ remediation of anoxic soils contaminated with organic pollutants, an insertion-type soil microbial fuel cell (MFC) was constructed and inserted into waterlogged soil to enhance the biodegradation of phenol and simultaneously electricity generation. The highest power density reached 29.45 mW/m(2), and an internal resistance of approximately 140 Omega was obtained under an external loading of 100 Omega. Under closed-circuit conditions, 90.1% of the phenol was removed after the soil MFC had operated for 10 days, but the degradation rates were only 27.6% and 12.3% under open-circuit and non-MFC conditions, respectively. The phenol degradation rate constant (k) under closed-circuit conditions was 0.390/day, which was approximately 23 times higher than under non-MFC conditions. The degradation of phenol was also positively correlated with the removal of soluble COD and particulate COD, indicating that the removal of organic pollutants and COD in waterlogged soils could be enhanced by a soil MFC system coupled with electricity generation. This method has important implications for soil remediation because it may accelerate the transformation or degradation of some toxic organic pollutants under anoxic conditions. (C) 2011 Elsevier B.V. All rights reserved.