Improved 4-chlorophenol dechlorination at biocathode in bioelectrochemical system using optimized modular cathode design with composite stainless steel and carbon-based materials

被引：28
作者：
Kong, Fanying [1 ]
Wang, Aijie [1 ,2 ]
Ren, Hong-Yu [1 ]
机构：
[1] Harbin Inst Technol, Sch Municipal & Environm Engn, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China
[2] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2014年 / 166卷
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
Bioelectrochemical system (BES); 4-Chlorophenol (4-CP); Dechlorination; Biocathode; Carbon-based material; MICROBIAL FUEL-CELLS; MESH CURRENT COLLECTORS; AZO-DYE; BIOELECTRICITY GENERATION; REDUCTIVE DECHLORINATION; ELECTRICITY-GENERATION; DECOLORIZATION; DEGRADATION; ELECTRODES; MINERALIZATION;
D O I：
10.1016/j.biortech.2014.05.049
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
This study developed and optimized a modular biocathode materials design in bioelectrochemical system (BES) using composite metal and carbon-based materials. The 4-chlorophenol (4-CP) dechlorination could be improved with such composite materials. Results showed that stainless steel basket (SSB) filled with graphite granules (GG) and carbon brush (CB) (SSB/GG/CB) was optimum for dechlorination, followed by SSB/CB and SSB/GG, with rate constant k of 0.0418 +/- 0.0002, 0.0374 +/- 0.0004, and 0.0239 +/- 0.0002 h(-1), respectively. Electrochemical impedance spectroscopy (EIS) demonstrated that the composite materials with metal can benefit the electron transfer and decrease the charge transfer resistance to be 80.4 Omega in BES-SSB/GG/CB, much lower than that in BES-SSB (1674.3 Omega), BES-GG (387.3 Omega), and BES-CB (193.8 Omega). This modular cathode design would be scalable with successive modules for BES scale-up, and may offer useful information to guide the selection and design of BES materials towards dechlorination improvement in wastewater treatment. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：252 / 258
页数：7
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