Cr(VI) reduction by Lysinibacillus sp. ReCr-13 and Cr(VI)-induced oxidative stress

被引：0
|
作者：
Qiu Y.-Q. [1 ]
Wu W.-J. [1 ]
Liu H. [1 ]
Li X.-Y. [1 ]
Zhang X. [1 ]
Zhu M.-L. [1 ]
Tan W.-S. [1 ]
机构：
[1] State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai
来源：
Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | 2019年 / 33卷 / 04期
关键词：
Antioxidant; Cr(VI) reduction; Lysinibacillus sp. ReCr-13; Mn[!sup]2+[!/sup; Oxidative stress;
D O I：
10.3969/j.issn.1003-9015.2019.04.011
中图分类号：
学科分类号：
摘要：
Chromium-containing industrial wastewater causes serious pollution problems, while certain microorganism can reduce Cr (VI) to less toxic Cr (III). A Cr(VI) reducing strain was isolated from river sludge and identified as Lysinibacillus sp. ReCr-13. Cr(VI) bio-reduction of the strain and oxidative stress response induced by Cr(VI) were investigated. The optimum Cr(VI) reduction efficiency was achieved by Lysinibacillus sp. ReCr-13 at pH 8.0, NaCl 5 g∙L-1 and 200 mg∙L-1 Cr(VI). The contents of intracellular O2 •-, H2O2 and MDA increase with the increase of initial Cr(VI) concentration in the range of 200~400 mg∙L-1,while the reduction efficiency of Cr(VI) decreases. The exogenous addition of Mn2+ can effectively promote the activity of intracellular antioxidant enzymes SOD and CAT, reduce the contents of intracellular O2 •-, H2O2 and MDA, and ultimately improve the reduction efficiency of Cr(VI). The results provide fundamental information for Cr(VI) bio-reduction in chromium-containing industrial wastewater. © 2019, Editorial Board of "Journal of Chemical Engineering of Chinese Universities". All right reserved.
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页码：856 / 863
页数：7
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