硫酸盐还原菌EPS）去除重金属离子Cd2+过程中的交互作用研究

南京大学学报(自然科学版) ›› 2013, Vol. 49 ›› Issue (6): 718–.

硫酸盐还原菌EPS）去除重金属离子Cd2+过程中的交互作用研究

彭书传，虞艳云，万正强，李明明，陈天虎，岳正波**

出版日期:2014-01-14 发布日期:2014-01-14
作者简介:(合肥工业大学资源与环境工程学院，合肥230009）
基金资助:
国家自然科学基金(41130206,41102214),国家重点基础研究发展规划(973)预研项目(2011CB411904)

Research on the interaction of sulfate reducing bacteria EPS and the heavy metal of Cd2+

Peng Shu-Chuan, Yu Yan-Yun, Wan Zheng-Qiang, Li Ming-Ming , Chen Tian-hu, Wang Jin, Yue Zheng-Bo

Online:2014-01-14 Published:2014-01-14
About author: (School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China)

摘要/Abstract

摘要： 本文以硫酸盐还原菌（Sulfate reducing bacteria, SRB）为试验菌株，探讨了重金属Cd2+对SRB胞外聚合物（Extracellular polymeric substances, EPS）组分和含量在，分别测定总产气量、Cd2+浓度以及EPS中蛋白质、多糖、核酸含量。实验结果表明试验菌株对Cd2+的最大耐受浓度为28.0 mg ? L-1；反应结束后Cd2+的去除率可以达到99%，而其中EPS的贡献率最大可以达到10%；蛋白质是SRB菌EPS的最主要组分；固态样品的SEM-EDS表征结果显示Cd2+与H2S生成CdS沉淀从而达到了固定Cd2+的作用。

Abstract: In this paper, the sulfate-reducing bacteria (SRB) was used as the test strains to explore the impacts of Cd2+ on the component and content of extracellular polymeric substances (EPS) and the role of EPS in the removal of Cd2+. Total gas production and Cd2+ concentrations were determined during the different reaction stages of the test as well as the content of proteins, polysaccharides and nucleic acids in EPS. The experimental results showed that the maximum tolerated concentration of Cd2+ to the test strain was 28.0 mg ? L-1. The removal efficiency of Cd2+ can reach 99% at the end of the reaction, in which the contribution of EPS was 10%. Protein was the most important component of the EPS produced by SRB. Furthermore, SEM-EDS characterization of the solid samples showed that Cd2+ was fixed by the generation of CdS precipitation with H2S produced.

彭书传，虞艳云，万正强，李明明，陈天虎，岳正波**. 硫酸盐还原菌EPS）去除重金属离子Cd2+过程中的交互作用研究[J]. 南京大学学报(自然科学版), 2013, 49(6): 718–.

Peng Shu-Chuan, Yu Yan-Yun, Wan Zheng-Qiang, Li Ming-Ming , Chen Tian-hu, Wang Jin, Yue Zheng-Bo. Research on the interaction of sulfate reducing bacteria EPS and the heavy metal of Cd2+[J]. Journal of Nanjing University(Natural Sciences), 2013, 49(6): 718–.

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