在Q235A钢的生物腐蚀上,细菌和甲素之间的协作或竞争相互作用
Jianping Wu1, Xiao Zhuang1, Weidong Zhang1
1Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen, China.
Environmental research
|January 11, 2025
概括
微生物相互作用显著影响铁的腐蚀. 甲细菌通过合作关系促进腐蚀,而Metanothrix和Methanospirillum通过竞争相互作用抑制腐蚀.
科学领域:
- 微生物学 微生物学
- 腐蚀科学 腐蚀科学
- 材料科学 材料科学 材料科学
背景情况:
- 铁 (Fe (0)) 金属的生物腐蚀涉及复杂的微生物群落,而不是单一的物种.
- 在没有硫酸盐的环境中,甲原体与其他细菌之间的物种间相互作用尚不清楚.
- 这些相互作用极大地影响金属的生物腐蚀过程.
研究的目的:
- 为了研究甲基生物和共存细菌之间的物种间相互作用.
- 为了确定这些相互作用对Q235A钢的生物腐蚀的影响.
- 阐明驱动不同微生物群落中甲受影响腐蚀的机制.
主要方法:
- 培养了三种不同的甲原微生物群 (甲诺特里克斯,甲斯皮里卢姆,甲细菌占主导地位).
- 分析这些微生物群中的物种间相互作用.
- 对Q235A钢表面的腐蚀产品和腐蚀率的评估.
主要成果:
- 在Methanothrix/Methanospirillum和发酵细菌之间的竞争性相互作用抑制了腐蚀.
- 甲细菌和乙酸酸氧化细菌之间的协作相互作用促进了腐蚀.
- 在Methanobacterium占主导地位的 (0.216毫米/年) 钢铁腐蚀率明显高于在Methanothrix/Methanospirillum占主导地位的 (0.009-0.046毫米/年) 微生物群中.
结论:
- 跨物种相互作用决定了铁的甲原影响生物腐蚀的程度.
- 竞争性相互作用导致保护性腐蚀产品层,抑制腐蚀.
- 协作相互作用导致多孔层,加速腐蚀,特别是与甲细菌.
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