Dynamic Modeling of the Sulfur Cycle in Urban Sewage Pipelines Under High-Temperature and High-Salinity Conditions
文献类型： 外文期刊
作者： Cao, Zhiwei 1 ; Xu, Zhen 2 ; Chen, Yufeng 3 ; Zhao, Bingxuan 4 ; Wang, Chenxu 5 ; Yu, Zuozhou 5 ; Zhou, Jingya 1 ;
作者机构： 1.Yanbian Univ, Coll Agr, Dept Agr Resources & Environm, Yanji 133002, Peoples R China
2.Yanbian Univ, Coll Geog & Ocean Sci, Yanji 133002, Peoples R China
3.Chinese Acad Trop Agr Sci, Minist Agr, Inst Trop Biosci & Biotechnol, Key Lab Biol & Genet Resources Trop Crops, Haikou 571101, Peoples R China
4.Univ Bologna, Dept Biol Geol & Environm Sci, Via St Alberto 163, I-48123 Ravenna, Italy
5.Yanbian Univ, Coll Geog & Ocean Sci, Dept Environm Sci, Yanji 133002, Peoples R China
关键词： dynamic model; sulfur cycle; phased reaction process; sewage pipelines; corrosion
期刊名称：MICROORGANISMS （ 影响因子：4.2； 五年影响因子：4.6 ）
ISSN：
年卷期： 2025 年 13 卷 7 期
页码：
收录情况： SCI
摘要： This study addresses the microbial corrosion of cement-based materials in coastal urban sewer networks, systematically investigating the kinetic mechanisms of sulfur biogeochemical cycling under seawater infiltration conditions. Through dynamic monitoring of sulfide concentrations and environmental parameter variations in anaerobic pipelines, a multiphase coupled kinetic model integrating liquid-phase, gas-phase, and biofilm metabolic processes was developed. The results demonstrate that moderate salinity enhances the activity of sulfate-reducing bacteria (SRB) and accelerates sulfate reduction rates, whereas excessive sulfide accumulation inhibits SRB activity. At 35 degrees C, the mathematical model coefficient "a" for sulfate reduction in the reactor with 3 g/L salinity was significantly higher than those in reactors with 19 g/L and 35 g/L salinities, with no significant difference observed between the latter two. Overall, high sulfate concentrations do not act as limiting factors for sulfide oxidation under anaerobic conditions; instead, they enhance the reaction within specific concentration ranges. The refined kinetic model enables prediction of sulfur speciation in tropical coastal urban sewer pipelines, providing a scientific basis for corrosion risk assessment.
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