Anodic Fenton process assisted by a microbial fuel cell for enhanced degradation of organic pollutants.
Anodic Fenton process assisted by a microbial fuel cell for enhanced degradation of organic pollutants.
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DOI：
10.1016/j.watres.2012.05.044
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发表时间：
2012-09
期刊：
影响因子：
12.8
通讯作者：
Xianwei Liu;Xue-Fei Sun;Dao-Bo Li;Wen‐Wei Li;Yu-Xi Huang;Guo-ping Sheng;Hanqing Yu
中科院分区：
文献类型：
--
作者：
Xianwei Liu;Xue-Fei Sun;Dao-Bo Li;Wen‐Wei Li;Yu-Xi Huang;Guo-ping Sheng;Hanqing Yu
电fenton法对有机污染物的降解是有效的，但由于需要电力投资，其运行成本较高。本文将微生物燃料电池（MFC）引入阳极Fenton工艺，开发了一种新型的阳极Fenton系统，以实现有机污染物的节能高效处理。该系统由一个阳极Fenton反应器和一个双室空气阴极MFC组成。双室MFC产生的能量通过加速牺牲铁原位生成Fe2+来驱动阳极Fenton工艺降解酸性橙7 （AO7）。动力学结果表明，mfc辅助阳极Fenton工艺体系的拟一阶速率常数明显高于化学Fenton工艺体系。电化学分析表明，AO7对铁的腐蚀没有阻碍作用。阳极Fenton工艺受MFC性能的影响。阴极中溶解氧的增加提高了MFC的功率密度，从而提高了AO7的降解率。这些都清楚地表明，阳极Fenton工艺可以与MFC相结合，开发一种具有成本效益和节能的自维持电化学废水处理系统。
The electro-Fenton process is efficient for degradation of organic pollutants, but it suffers from the high operating costs due to the need of power investment. Here, a new anodic Fenton system is developed for energy-saving and efficient treatment of organic pollutants by incorporating microbial fuel cell (MFC) into an anodic Fenton process. This system is composed of an anodic Fenton reactor and a two-chamber air-cathode MFC. The power generated from a two-chamber MFC is used to drive the anodic Fenton process for Acid Orange 7 (AO7) degradation through accelerating in situ generation of Fe2+from sacrificial iron. The kinetic results show that the MFC-assisted anodic Fenton process system had a significantly higher pseudo-first-order rate constant than those for the chemical Fenton methods. The electrochemical analysis reveals that AO7 did not hinder the corrosion of iron. The anodic Fenton process was influenced by the MFC performance. It was also found that increasing dissolved oxygen in the cathode improved the MFC power density, which in turn enhanced the AO7 degradation rate. These clearly demonstrate that the anodic Fenton process could be integrated with MFC to develop a self-sustained system for cost-effective and energy-saving electrochemical wastewater treatment.