Accelerated Reduction of Chlorinated Nitroaromatic Antibiotic Chloramphenicol by Biocathode
文献类型：期刊论文
| 作者 | Liu, Wen-Zong
|
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2013 |
| 卷号 | 47期号:10页码:5353-5361 |
| 通讯作者 | Wang, AJ |
| 中文摘要 | Chlorinated nitroaromatic antibiotic chloramphenicol (CAP) is a priority pollutant in wastewaters. A fedbatch bioelectrochemical system (BES) with biocathode with applied voltage of 0.5 V (served as extracellular electron donor) and glucose as intracellular electron donor was applied to reduce CAP to amine product (AMCl2). The biocathode BES converted 87.1 +/- 4.2% of 32 mg/L CAP in 4 h, and the removal efficiency reached 96.0 +/- 0.9% within 24 h. Conversely, the removal efficiency of CAP in BES with an abiotic cathode was only 73.0 +/- 3.2% after 24 h. When the biocathode was disconnected (no electrochemical reaction but in the presence of microbial activities), the CAP removal rate was dropped to 62.0% of that with biocathode BES. Acetylation of one hydroxyl of CAP was noted exclusive in the biocatalyzed process, while toxic intermediates, hydroxylamino (HOAM), and nitroso (NO), from CAP reduction were observed only in the abiotic cathode BES. Electrochemical hydrodechlorination and dehalogenase were responsible for dechlorination of AMCl2 to AMCl in abiotic and microbial cathode BES, respectively. The cyclic voltammetry (CV) highlighted higher peak currents and lower overpotentials for CAP reduction at the biocathode compared with abiotic cathode. With the biocathode BES, antibacterial activity of CAP was completely removed and nitro group reduction combined with dechlorination reaction enhanced detoxication efficiency of CAP. The CAP cathodic transformation pathway was proposed based on intermediates analysis. Bacterial community analysis indicated that the dominate bacteria on the biocathode were belonging to alpha, beta, and gamma-Proteobacteria. The biocathode BES could serve as a potential treatment process for CAP-containing wastewater. |
| 收录类别 | SCI |
| WOS记录号 | WOS:000319708600048 |
| 公开日期 | 2014-06-06 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/7370]  |
| 专题 | 生态环境研究中心_中国科学院环境生物技术重点实验室 |
| 推荐引用方式 GB/T 7714 | Liu, Wen-Zong. Accelerated Reduction of Chlorinated Nitroaromatic Antibiotic Chloramphenicol by Biocathode[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2013,47(10):5353-5361. |
| APA | Liu, Wen-Zong.(2013).Accelerated Reduction of Chlorinated Nitroaromatic Antibiotic Chloramphenicol by Biocathode.ENVIRONMENTAL SCIENCE & TECHNOLOGY,47(10),5353-5361. |
| MLA | Liu, Wen-Zong."Accelerated Reduction of Chlorinated Nitroaromatic Antibiotic Chloramphenicol by Biocathode".ENVIRONMENTAL SCIENCE & TECHNOLOGY 47.10(2013):5353-5361. |
入库方式： OAI收割
来源：生态环境研究中心
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