Enhanced Removal of Herbicide 2,4-dichlorophenoxyacetic Acid and Simultaneous Power Generation in Microbial Fuel Cells

被引：0
|
作者：
Quan X.-C. [1 ]
Quan Y.-P. [1 ]
Xiao Z.-T. [1 ]
机构：
[1] State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing
来源：
| 2017年 / Science Press卷 / 38期
关键词：
2,4-dichlorophenoxyacetic acid; Anode aeration; Biodegradation; Microbial fuel cell (MFC); Recalcitrant organics;
D O I：
10.13227/j.hjkx.201608126
中图分类号：
学科分类号：
摘要：
This study investigated the effects of a widely used herbicide 2,4-dichlorophenoxyacetic acid on power generation, pollutants removal from microbial fuel cells (MFCs) and microbial community changes, and also explored anode pre-aeration for enhanced 2,4-D removal and power generation. The results showed that when 2,4-D was inputted to the anode chamber of MFCs which was previously enriched with acetate sodium as the fuel, the voltage output and power density declined and the internal resistance increased apparently. The maximum power density declined to 0.057 W·m-2 in the presence of 300 mg·L-1 2,4-D comparing to 0.151 W·m-2 obtained with acetate alone (850 mg·L-1), and the internal resistance increased from 524 Ω to 1 230 Ω correspondingly. To accelerate 2,4-D removal rate and reduce its inhibition to anode exoelectrogens, 6h pre-aeration was applied to the anode chamber. Fast removal of 2,4-D was achieved during aeration period and simultaneous high maximum voltage output (0.42-0.47 V) was obtained. Anode microbial community changed after 2,4-D addition and several 2,4-D degrading bacteria and 2,4-D tolerant exoelectrogen were enriched. MFCs could be used for 2,4-D removal and simultaneous power generation through anode pre-aeration. © 2017, Science Press. All right reserved.
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页码：1067 / 1073
页数：6
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