再生水环境中304不锈钢生物膜腐蚀电化学特征

doi:10.3866/PKU.WHXB20100927

物理化学学报 >> 2010, Vol. 26 >> Issue (10): 2638-2646.doi: 10.3866/PKU.WHXB20100927

再生水环境中304不锈钢生物膜腐蚀电化学特征

李进, 许兆义, 李久义, 焦迪

北京交通大学市政与环境工程系, 北京 100044

收稿日期:2010-02-24 修回日期:2010-04-28 发布日期:2010-09-27
通讯作者: 李进 E-mail:jinli@bjtu.edu.cn
基金资助:
大唐国际发电股份有限公司项目(TX06-15)资助

Characteristics of theMicrobiologically Influenced Corrosion of 304 Stainless Steel in Reclaimed Water Enviroment

LI Jin, XU Zhao-Yi, LI Jiu-Yi, JIAO Di

Department of Municipal and Environmental Engineering, Beijing JiaoTong University, Beijing 100044, P. R. China

Received:2010-02-24 Revised:2010-04-28 Published:2010-09-27
Contact: LI Jin E-mail:jinli@bjtu.edu.cn
Supported by:
The project was supported by the Datang International Power Generation Co., LTD, China (TX06-15).

摘要/Abstract

摘要：

研究了以再生水作为循环冷却系统补水的北京某热电厂冷却塔底粘泥中分离纯化培养出来的硫酸盐还原菌(SRB)生长特性. 采用原子力显微镜(AFM)、扫描电镜(SEM)、能谱分析仪(EDS)和电化学交流阻抗(EIS)方法研究了304 不锈钢(SS304)表面生物膜特征及其主要成分和不锈钢/生物膜界面电化学行为. 结果显示, 再生水环境下304 不锈钢表面形成的生物膜是由吸附的SRB 菌体及以含碳有机物为主的胞外聚合物和FeS 腐蚀产物构成.浸泡前期(前7 d) SS304 电极表面阻抗值主要由SS304 表面钝化膜的贡献;浸泡后期(14 d后), 电极体系阻抗值由不锈钢表面钝化膜和生物膜共同贡献.

关键词: 再生水, 304 不锈钢, 硫酸盐还原菌, 生物膜, 原子力显微镜, 交流阻抗谱

Abstract:

The growth characteristics of sulfate reducing bacteria (SRB) in real reclaimed water were studied. Characteristics of the biofilm and its main components on the surface of stainless steel 304 (SS304) sample immersed in reclaimed water with SRB, the electrochemical behavior of the interface between the SS304 sample and the biofilm were investigated using atomic force microscopy (AFM), scanning electron microscopy (SEM), energy disperse spectroscopy (EDS), and electrochemical impedance spectroscopy (EIS). The results show that this strain of SRB can survive in reclaimed water. A biofilm formed on the surface of SS304 and consisted of microbial cells, a carbohydrate component from extracellular polymeric substances (EPS) and a corrosion product such as FeS. During the early immersion period (before 7d), the impedance value mainly originated from the contribution of passivation film on the SS304 electrode surface. During the later immersion period (after 14 d), the impedance value was mainly due to the combined effect of the passivation filmand the biofilmon the SS304 electrode surface.

Key words: Reclaimed water, Stainless steel 304, Sulfate reducing bacteria, Biofilm, AFM, EIS

李进, 许兆义, 李久义, 焦迪. 再生水环境中304不锈钢生物膜腐蚀电化学特征[J]. 物理化学学报, 2010, 26(10), 2638-2646. doi: 10.3866/PKU.WHXB20100927

LI Jin, XU Zhao-Yi, LI Jiu-Yi, JIAO Di. Characteristics of theMicrobiologically Influenced Corrosion of 304 Stainless Steel in Reclaimed Water Enviroment[J]. Acta Phys. -Chim. Sin. 2010, 26(10), 2638-2646. doi: 10.3866/PKU.WHXB20100927

链接本文: https://www.whxb.pku.edu.cn/CN/10.3866/PKU.WHXB20100927

https://www.whxb.pku.edu.cn/CN/Y2010/V26/I10/2638

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再生水环境中304不锈钢生物膜腐蚀电化学特征

Characteristics of theMicrobiologically Influenced Corrosion of 304 Stainless Steel in Reclaimed Water Enviroment

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