Reduction of Cr(VI) by Escherichia coli BL21 in the presence of redox mediators
文献类型：期刊论文
| 作者 | Guo, Jianbo ; Lian, Jing ; Xu, Zhifang ; Xi, Zhenhua ; Yang, Jingliang ; Jefferson, William ; Liu, Chun ; Li, Zaixing ; Yue, Lin |
| 刊名 | BIORESOURCE TECHNOLOGY
 |
| 出版日期 | 2012 |
| 卷号 | 123页码:713－716 |
| 关键词 | Chromate Redox mediator Anthraquinone-2-sulfonate (AQS) Reduction |
| ISSN号 | 0960-8524 |
| 中文摘要 | Anthraquinone-2,7-disulfonate (2,7-AQDS), anthraquinone-1-sulfonate (alpha-AQS), anthraquinone-2-sulfonate (AQS), anthraquinone-2,6-disulfonate (AQDS) and anthraquinone-1,5-disulfonate (1,5-AQDS) were selected as redox mediators for Cr(VI) reduction by Escherichia coil BL21. In the presence of 0.8 mmol l(-1) AQS, the Cr(VI) reduction efficiency was 98.5% in 7.5 h, whereas it was only 21-34% in the absence of a mediator or in the presence of alpha-AQS, 1,5-AQDS, AQDS, 2,7-AQDS. A linear correlation, k = 0.768C(AQs) + 1.5531 (R-2 = 0.9935), was found for the reaction constant, k (mg Cr(VI) g(-1) dry cell weight h(-1)) and the AQS concentration (C-AQS). The Arrhenius equation described the Cr(VI) reduction in the tested temperature range, and the pre-exponential factor A was 13.249 mg Cr(VI) g(-1) dry cell weight h(-1),and the activation energy Ea was 28.01 kJ mol(-1). Glucose was the best carbon sources, and the optimum pH was 6.0. The Cr(VI) reduction rate obtained with AQS is a significant improvement over low conventional anaerobic reduction rates. (C) 2012 Elsevier Ltd. All rights reserved. |
| WOS记录号 | WOS:000310401100104 |
| 公开日期 | 2014-11-04 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/7795]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Guo, Jianbo,Lian, Jing,Xu, Zhifang,et al. Reduction of Cr(VI) by Escherichia coli BL21 in the presence of redox mediators[J]. BIORESOURCE TECHNOLOGY,2012,123:713－716. |
| APA | Guo, Jianbo.,Lian, Jing.,Xu, Zhifang.,Xi, Zhenhua.,Yang, Jingliang.,...&Yue, Lin.(2012).Reduction of Cr(VI) by Escherichia coli BL21 in the presence of redox mediators.BIORESOURCE TECHNOLOGY,123,713－716. |
| MLA | Guo, Jianbo,et al."Reduction of Cr(VI) by Escherichia coli BL21 in the presence of redox mediators".BIORESOURCE TECHNOLOGY 123(2012):713－716. |
入库方式： OAI收割
来源：生态环境研究中心
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