标题: The simultaneous removal of the combined pollutants of hexavalent chromium and o-nitrophenol by Chlamydomonas reinhardtii

作者: Wei, SJ (Wei, Sijie); Cao, J (Cao, Jun); Ma, XY (Ma, Xinyue); Ping, J (Ping, Jie); Zhang, C (Zhang, Chao); Ke, T (Ke, Tan); Zhang, YR (Zhang, Yurui); Tao, Y (Tao, Yue); Chen, LZ (Chen, Lanzhou)

来源出版物: ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY  卷: 198  文献号: 110648  DOI: 10.1016/j.ecoenv.2020.110648  出版年: JUL 15 2020  

摘要: Microalgae have been used for the removal of heavy metals or synthetic organics; however, the simultaneous removal of both types of compounds is always technically difficult. In this study, a green algae, Chlamydomonas reinhardtii, was first used to simultaneously remove hexavalent chromium [Cr(VI)] and o-nitrophenol (ONP), and the balance among biomass, oxidative damage and removal rate was also investigated. The results showed that treatment with Cr(VI) or ONP decreased the photosynthetic and superoxide dismutase activities and increased the production of reactive oxygen species (ROS) and malondialdehyde content. However, combined treatment with Cr(VI) (<= 4 mg/L) and ONP (<= 15 mg/L) significantly decreased ROS generation and alleviated cell damage in C. reinhardtii. In addition, the removal rates of Cr(VI) and ONP by C. reinhardtii cells significantly increased from 37.4% to 54.9% and from 35.8% to 45.9%, respectively, and the cells could be reused at least four times. Moreover, the increased acidity in the medium and Cr(VI) reductase content in C. reinhardtii caused Cr(VI) to be reduced to Cr(III). The addition of an exogenous antioxidant decreased the removal rates of Cr(VI) and ONP. These results indicated that the presence of Cr(VI) could induce ROS generation in C. reinhardtii and enhance ONP degradation, which consumed ROS, alleviated cell damage, and thus benefited Cr(VI) reduction. As a result, C. reinhardtii could be used as a theoretical candidate for the simultaneous removal of combined Cr(VI) and ONP contamination.

入藏号: WOS:000533505100011

语言: English

文献类型: Article

作者关键词: Chlamydomonas reinhardtii; Hexavalent chromium; O-nitrophenol; Combined contamination; Oxidative stress; Biodegradation

地址: [Wei, Sijie; Cao, Jun; Ma, Xinyue; Zhang, Chao; Ke, Tan; Zhang, Yurui; Tao, Yue; Chen, Lanzhou] Wuhan Univ, Sch Resources & Environm Sci, Hubei Key Lab Biomass Resources Chem & Environm B, Wuhan 430079, Peoples R China.

[Cao, Jun] Hanjiang Normarl Univ, Coll Chem & Environm Engn, Shiyan 442000, Peoples R China.

[Ping, Jie] Wuhan Univ, Sch Basic Med Sci, Wuhan 430079, Peoples R China.

通讯作者地址: Chen, LZ (通讯作者)，Wuhan Univ, Sch Resources & Environm Sci, Hubei Key Lab Biomass Resources Chem & Environm B, Wuhan 430079, Peoples R China.

电子邮件地址: chenlz@whu.edu.cn

影响因子：4.527