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腐蚀微生物硫酸盐还原菌在不同荷电状态表面的初始附着行为

DOI: 10.11903/1002.6495.2013.348, PP. 487-493

Keywords: 微生物腐蚀,硫酸盐还原菌,自组装膜,表面电荷,电化学阻抗谱

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Abstract:

研究了材料表面电荷对硫酸盐还原菌(SRB)初始附着行为的影响。分别将6-胺基-1-己烷硫醇,6-巯基-1-己醇和6-巯基己酸修饰在Au电极表面,形成不同荷电状态的自组装膜(SAMs)。用电化学阻抗(EIS)和扫描电子显微镜(SEM)监测SRB在3种SAMs表面的附着。结果表明,荷正电的SAMs表面有利于SRB的初期附着,而荷负电的SAMs表面则会抑制SRB初期附着并使其可逆附着过程的时间延长。另外,3种表面的电荷转移电阻变化率(?Rct%)可在一定程度上反映SRB的初期附着情况。

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