Reduction of Cr(VI) by Escherichia coli BL21 in the presence of redox mediators.
Reduction of Cr(VI) by Escherichia coli BL21 in the presence of redox mediators.
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在氧化还原介体存在下,大肠杆菌 BL21 还原 Cr(VI)。
DOI:
10.1016/j.biortech.2012.07.090
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发表时间:
2012-11
影响因子:
11.4
通讯作者:
Lin Yue
中科院分区:
文献类型:
--
作者:
Jianbo Guo;Jing Lian;Zhifang Xu;Zhenhua Xi;Jingliang Yang;William Jefferson;Chun Liu;Zaixing Li;Lin Yue
Anthraquinone-2,7-disulfonate (2,7-AQDS), anthraquinone-1-sulfonate (α-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 coli BL21. In the presence of 0.8mmoll−1AQS, the Cr(VI) reduction efficiency was 98.5% in 7.5h, whereas it was only 21–34% in the absence of a mediator or in the presence of α-AQS, 1,5-AQDS, AQDS, 2,7-AQDS. A linear correlation, k=0.768CAQS+1.5531 (R2=0.9935), was found for the reaction constant, k (mg Cr(VI) g−1dry cell weight h−1) and the AQS concentration (CAQS). The Arrhenius equation described the Cr(VI) reduction in the tested temperature range, and the pre-exponential factor A was 13.249mg Cr(VI) g−1dry cell weight h−1,and the activation energy Ea was 28.01kJmol−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.
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DOI:
--
发表时间:
2010-12
期刊:
--
影响因子:
--
作者:
M. Moo-young;W. A. Anderson;A. Chakrabarty
通讯作者:
M. Moo-young;W. A. Anderson;A. Chakrabarty
影响因子:
11.4
作者:
Guo, Jianbo;Kang, Li;Wang, Yuyu
通讯作者:
Wang, Yuyu
DOI:
10.1061/(asce)0733-9372(1998)124:12(1165
发表时间:
1998-12
期刊:
--
影响因子:
--
作者:
L. Philip;L. Iyengar;C. Venkobachar
通讯作者:
L. Philip;L. Iyengar;C. Venkobachar
影响因子:
2.9
作者:
Kobya, M
通讯作者:
Kobya, M
影响因子:
11.4
作者:
Jianbo Guo;Huijuan Liu;J. Qu;J. Lian;Li-jun Zhao;William A. Jefferson;Jing-liang Yang
通讯作者:
Jianbo Guo;Huijuan Liu;J. Qu;J. Lian;Li-jun Zhao;William A. Jefferson;Jing-liang Yang