Decolorization of an azo dye Orange G in microbial fuel cells using Fe(II)-EDTA catalyzed persulfate

被引：51
|
作者：
Niu, Cheng-Gang [1 ]
Wang, Ying
Zhang, Xue-Gang
Zeng, Guang-Ming
Huang, Da-Wei
Ruan, Min
Li, Xiang-Wei
机构：
[1] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2012年 / 126卷
基金：
中国国家自然科学基金; 高等学校博士学科点专项科研基金;
关键词：
Microbial fuel cell; Fe(II)-EDTA catalyzed persulfate; Orange G decolorization; Maximum power density; IN-SITU REMEDIATION; DEGRADATION; OXIDATION; AGENTS; IRON; TCE; ION;
D O I：
10.1016/j.biortech.2012.09.001
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
This study constructed a microbial fuel cell (MFC) using Fe(II)-EDTA catalyzed persulfate as the cathode solutions to decolorize Orange G (OG) and harvest electricity simultaneously. Chelated Fe2+ could activate persulfate to generate sulfate free radicals (SO4-) which with high oxidation potential (E-0 = 2.6 V) can degrade azo dyes. The influence of some important factors such as pH value of cathode solutions, dosages of K2S2O8, Fe2+ and EDTA were investigated in a two-chamber microbial fuel cell. Under an optimal condition, the maximum power density achieved 91.1 mW m(-2), the OG removal rate was 97.4% and the K2S2O8 remaining rate was 47.3% after 12 h. The OG degradation by Fe(II)-EDTA catalyzed persulfate was found to follow the second-order kinetic model. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：101 / 106
页数：6
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