文献类型：期刊文献

中文题名：Lysinibacillus sp. ReCr-13还原Cr(VI)特性及对Cr(VI)诱导的氧化胁迫响应

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

作者：Qiu, Yong-Qiu[1]; Wu, Wei-Jin[1]; Liu, Hao[1]; Li, Xi-Yan[1]; Zhang, Xu[1]; Zhu, Ming-Long[1]; Tan, Wen-Song[1]

机构：[1] State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2019

卷号：33

期号：4

起止页码：856

外文期刊名：Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities

收录：EI(收录号：20193807445282)

语种：中文

外文关键词：Manganese compounds - Antioxidants - Chromium compounds - Efficiency - River pollution

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.