ZnO纳米粒子的抑菌性能及其对不锈钢微生物腐蚀的影响

Sterilization of ZnO Nanoparticles and Their Effect on Microbial Corrosion of Stainless Steel

摘要: 采用微生物培养与检测、电化学测试及表面分析等方法研究了ZnO纳米粒子对硫酸盐还原菌（SRB）的抑菌性能及对304不锈钢的微生物腐蚀行为影响。结果表明：ZnO纳米粒子能够通过接触杀菌作用和催化生成活性氧物质（ROS）从而抑制SRB的活性,抑菌率随ZnO纳米粒子含量的增加而增大,当ZnO纳米粒子质量浓度为100 mg·L^-1时,抑菌率达到89.3%；通过ZnO纳米粒子对SRB的抑菌作用,减少了SRB的代谢产物以及在不锈钢表面黏附而形成的微生物膜,降低了不锈钢的钝态电流密度,抑制了不锈钢的微生物腐蚀。

Abstract: The sterilization of ZnO nanoparticles on sulfate-reducing bacteria (SRB) and the microbial corrosion behavior of 304 stainless steel were investigated by methods of microbial culture and detection, electrochemical measurements and surface analysis. The results show that ZnO nanoparticles could inhibit SRB activity through the contact sterilizing effect and catalytic generation of reactive oxygen species (ROS), and the sterilizing rate increased to 89.3% when the concentration of ZnO nanoparticles increased to 100 mg·L^-1. The sterilizing effect of ZnO nanoparticles on SRB reduced the metabolites of SRB, the microbial film adhered on the surface of stainless steel, then reduced the passive current density of stainless steel, and thereby inhibited the microbial corrosion of stainless steel.