| 摘要: |
| 为研究污水环境下硫氧化细菌对砂浆性能的影响机制，使用离子色谱仪、超景深显微镜、扫描电镜等对硫氧化细菌的代谢过程以及砂浆的宏观和微观性能进行表征分析.结果表明：硫氧化细菌的代谢作用可以将Na2S2O3转化成生物硫酸盐；相对于灭菌污水培养基的影响，硫氧化细菌对砂浆性能起缓蚀作用；含有硫氧化细菌组试件表面附着生物被膜，其微观结构复杂且有许多孔洞，而且生物被膜可以聚集大量硫氧化细菌代谢生成SO2-4，并对砂浆表面起到靶向破坏作用. |
| 关键词: 砂浆 微生物 生物被膜 影响机制 |
| DOI：103969/j.issn.1007 9629202103002 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51978439，51708390）；天津市交通运输科技发展计划（2018 38）；中国博士后科学基金资助项目（2019M651000）；天津市轨道交通重大专项（18ZXGDGX00050） |
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| Influencing Mechanism of Sulfur Oxidizing Bacteria on Performance of Mortar in Sewage |
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RONG Hui1, LIU Jiwei1, MA Guowei2, LIU Zhihua1, YANG Yong1
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1.School of Materials Science and Engineering, Tianjin Chengjian University, Tianjin 300384, China;2.School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China
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| Abstract: |
| In order to study the influencing mechanism of sulfur oxidizing bacteria on the mortar in sewage, the microbial metabolic process and the macro and micro performance of the mortar was analyzed by chromatography, ultra depth microscope, scanning electron microscope and other methods. The results show that metabolism of sulfur oxidizing bacteria can convert sodium thiosulfate to biological sulfate instead of biological sulfuric acid. Compared with the influences of sterilized sewage medium, the sulfur oxidizing bacteria have a corrosion inhibitory effect on the performance of the mortar. The surface of the specimens of test group with sulfur oxidizing bacteria is attached with biofilms, which have a complex microstructure and many holes, and the biofilms can accumulate a large number of sulfur oxidizing bacteria to generate SO2-4, which can target the surface of the mortar. |
| Key words: concrete microorganism biofilm influencing mechanism |
