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采用铂片微排电极研究了硫酸盐还原菌(SRB)生物膜在有无磁场环境下的电化学行为。结果表明:无磁场下铂片电极表面覆盖一层很厚的生物膜,通过显微镜观察厚度为141.4μm,生物膜电阻较大,生物膜脱吸附过程进行时间较长,生成的腐蚀性产物较多。磁场存在下SRB细菌不容易在铂片电极表面吸附,进而形成的生物膜较薄(厚度为67.06μm),生物膜在很短时间内达到了脱吸附平衡状态,从而生物膜内腐蚀性物质较少,对基体的腐蚀作用较弱。电荷传质电阻Rct表明,磁场的引入极大地阻碍了电极表面电荷的运动,从而影响了电化学过程的顺利进行。
The electrochemical behavior of sulfate-reducing bacteria (SRB) biofilms in the presence or absence of a magnetic field was investigated using platinum-based micro-discharge electrodes. The results showed that the surface of the platinum electrode was covered with a thick biofilm without magnetic field. The thickness of the biofilm was 141.4μm under microscope. The biofilm had a higher resistance. The desorption process of the biofilm took longer and produced more corrosive products . In the presence of magnetic field, SRB bacteria are not easily adsorbed on the surface of the platinum electrode, resulting in a thin biofilm with a thickness of 67.06 μm. The biofilm reaches a state of desorption equilibrium in a short period of time, so that the corrosive substances in the biofilm Less corrosion on the substrate is weak. Charge transfer resistance Rct shows that the introduction of a magnetic field greatly hindered the movement of the electrode surface charge, thus affecting the smooth progress of the electrochemical process.