港湾海水界面微型生物膜表征研究

Research on Characterization of Micro-Biofilm at the Interface of Harbor Water

摘要: 微型生物膜是污损生物群落形成的初期阶段，会左右金属腐蚀和生物污损过程，给人类海事活动和海中设施正常运转带来严重危害。研究微生物膜的形成是海洋防腐防污研究的热点之一。本文利用SEM、EDS、XRD和FTIR等测试分析方法对青岛港湾工业纯钛表面微型生物膜进行了初步的表征，通过塔菲尔极化曲线对微生物膜电化学行为进行了分析。结果表明仅有硅藻的完整形貌和Na、Ca、Si及有机物质；载玻片的微生物膜较钛板上的硅藻密度高，微生物膜对钛的电化学性能影响不明显；讨论了膜中微型生物的分析方法，对微生物膜的研究及钛在海水中的应用有一定启示。

Abstract: Micro-biofilm is the initial stage of the formation of fouling biological community, to control the metal corrosion and biological fouling process, and bring serious harm to human maritime activities and the normal operation of marine facilities. Exploring the formation of micro-biofilm is the key to the research of marine anticorrosion and antifouling. In this paper, the micro-biofilm on the surface of industrial pure titanium in Qingdao Harbor was preliminarily characterized by SEM, EDS, XRD and FTIR. The electrochemical behavior of micro-biofilm was analyzed by Tafel polarization curve. The results show that only the complete morphology of diatoms, Na, Ca, Si and organic matter are present. The density of micro-biofilm on the slide is higher than that on the titanium plate, and the effect of micro-biofilm on the electrochemical performance of titanium is not obvious. The analysis method of micro-organisms in the membrane was discussed, which provides some implications for the research of micro-biofilm and the application of titanium in seawater.