In-situ Cr(VI) reduction with electrogenerated hydrogen peroxide driven by iron-reducing bacteria
文献类型： 外文期刊
作者： Liu, Liang 1 ; Yuan, Yong 1 ; Li, Fang-bai 1 ; Feng, Chun-hua 3 ;
作者机构： 1.Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China
3.S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Peoples R China
4.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
关键词： Cr(VI) reduction;Electrogenerated hydrogen peroxide;Iron-reducing bacteria;Microbial fuel cell
期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）
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收录情况： SCI
摘要： Cr(VI) was reduced in-situ at a carbon felt cathode in an air-cathode dual-chamber microbial fuel cell (MFC). The reduction of Cr(VI) was proven to be strongly associated with the electrogenerated H_2O_2 at the cathode driven by iron-reducing bacteria. At pH 2.0, only 42.5% of Cr(VI) was reduced after 12h in the nitrogen-bubbling-cathode MFC, while complete reduction of Cr(VI) was achieved in 4h in the air-bubbling-cathode MFC in which the reduction of oxygen to H_2O_2 was confirmed. Conditions that affected the efficiency of the reduction of Cr(VI) were evaluated experimentally, including the cathodic electrolyte pH, the type of iron-reducing species, and the addition of redox mediators. The results showed that the efficient reduction of Cr(VI) could be achieved with an air-bubbling-cathode MFC.
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