Selenium-mediated Cr(VI) reduction and SeNPs synthesis accelerated Bacillus cereus SES to remediate Cr contamination
文献类型： 外文期刊
作者： Nie, Min 1 ; Cai, Miaomiao 1 ; Wu, Chihhung 2 ; Li, Shiqian 3 ; Chen, Suhua 4 ; Shi, Guangyu 5 ; Wang, Xu 6 ; Hu, Chengxiao 1 ; Xie, Jiatao 1 ; Tang, Yanni 1 ; Zhang, Huan 1 ; Zhao, Xiaohu 1 ;
作者机构： 1.Huazhong Agr Univ, Coll Resources & Environm, State Key Lab Agr Microbiol, Wuhan 430070, Peoples R China
2.Sanming Univ, Fujian Prov Key Lab Resources & Environm Monitori, Sanming 365004, Peoples R China
3.Fujian Polytech Normal Univ, Fujian Prov Key Lab Coastal Basin Environm, Fuqing 350300, Peoples R China
4.Nanchang Hangkong Univ, Instrumental Anal Ctr, Nanchang 330063, Peoples R China
5.Suzhou Univ Sci & Technol, Coll Environm Sci & Engn, Suzhou 215009, Peoples R China
6.Guangdong Acad Agr Sci, Inst Qual Stand & Monitoring Technol Agroprod, Guangzhou 510640, Peoples R China
7.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China
关键词： Cr(VI) bioremediation; Bacillus cereus; Selenite reduction; Selenium nanoparticles; Proteomics
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：13.6； 五年影响因子：12.7 ）
ISSN： 0304-3894
年卷期： 2023 年 457 卷
页码：
收录情况： SCI
摘要： Microbial biotransformation of Cr(VI) is a sustainable approach to reduce Cr(VI) toxicity and remediate Cr(VI) contamination. In this study, Bacillus cereus SES with the capability of reducing both Cr(VI) and Se(IV) was isolated, and the effect of Se supplementation on Cr(VI) reduction by Bacillus cereus SES was investigated. Se(IV) addition enabled 2.6-fold faster Cr(VI) reduction, while B. cereus SES reduced 96.96% Se(IV) and produced more selenium nanoparticles (SeNPs) in the presence of Cr(VI). Co-reduction products of B. cereus SES on Cr(VI) and Se (IV) were SeNPs adsorbed with Cr(III). The relevant mechanisms were further revealed by proteomics. Se(IV) supplementation mediated the synthesis of Cr(VI) reductants and stress-resistant substances, thus enhancing Cr (VI) resistance and promoting Cr(VI) reduction. Meanwhile, high Se(IV) reduction rate was associated with Cr (VI)-induced electron transport processes, and Cr(VI) mediated the up-regulation of flagellar assembly, protein export and ABC transporters pathways to synthesis and export more SeNPs. Furthermore, Se combined with B. cereus SES had the potential to reduce the toxicity of Cr(VI) via reducing the bioavailability of Cr and improving the bioavailability of Se in soil. Results suggested that Se could be an efficient strategy to enhance the remediation of B. cereus SES on Cr contamination.
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