Dynamic Modeling of the Sulfur Cycle in Urban Sewage Pipelines Under High-Temperature and High-Salinity Conditions
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...
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| Language: | English |
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MDPI AG
2025-06-01
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| Series: | Microorganisms |
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| Online Access: | https://www.mdpi.com/2076-2607/13/7/1534 |
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| author | Zhiwei Cao Zhen Xu Yufeng Chen Bingxuan Zhao Chenxu Wang Zuozhou Yu Jingya Zhou |
| author_facet | Zhiwei Cao Zhen Xu Yufeng Chen Bingxuan Zhao Chenxu Wang Zuozhou Yu Jingya Zhou |
| author_sort | Zhiwei Cao |
| collection | DOAJ |
| description | 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 °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. |
| format | Article |
| id | doaj-art-aac4ecf09a5646b79bdaf6a69109053f |
| institution | DOAJ |
| issn | 2076-2607 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Microorganisms |
| spelling | doaj-art-aac4ecf09a5646b79bdaf6a69109053f2025-08-20T03:07:55ZengMDPI AGMicroorganisms2076-26072025-06-01137153410.3390/microorganisms13071534Dynamic Modeling of the Sulfur Cycle in Urban Sewage Pipelines Under High-Temperature and High-Salinity ConditionsZhiwei Cao0Zhen Xu1Yufeng Chen2Bingxuan Zhao3Chenxu Wang4Zuozhou Yu5Jingya Zhou6Department of Agricultural Resources and Environment, College of Agriculture, Yanbian University, Yanji 133002, ChinaCollege of Geography and Ocean Sciences, Yanbian University, Yanji 133002, ChinaKey Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, ChinaDepartment of Biological, Geological, and Environmental Sciences, University of Bologna, Via Sant’Alberto 163, 48123 Ravenna, ItalyDepartment of Environmental Science, College of Geography and Ocean Sciences, Yanbian University, Yanji 133002, ChinaDepartment of Environmental Science, College of Geography and Ocean Sciences, Yanbian University, Yanji 133002, ChinaDepartment of Agricultural Resources and Environment, College of Agriculture, Yanbian University, Yanji 133002, ChinaThis 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 °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.https://www.mdpi.com/2076-2607/13/7/1534dynamic modelsulfur cyclephased reaction processsewage pipelinescorrosion |
| spellingShingle | Zhiwei Cao Zhen Xu Yufeng Chen Bingxuan Zhao Chenxu Wang Zuozhou Yu Jingya Zhou Dynamic Modeling of the Sulfur Cycle in Urban Sewage Pipelines Under High-Temperature and High-Salinity Conditions Microorganisms dynamic model sulfur cycle phased reaction process sewage pipelines corrosion |
| title | Dynamic Modeling of the Sulfur Cycle in Urban Sewage Pipelines Under High-Temperature and High-Salinity Conditions |
| title_full | Dynamic Modeling of the Sulfur Cycle in Urban Sewage Pipelines Under High-Temperature and High-Salinity Conditions |
| title_fullStr | Dynamic Modeling of the Sulfur Cycle in Urban Sewage Pipelines Under High-Temperature and High-Salinity Conditions |
| title_full_unstemmed | Dynamic Modeling of the Sulfur Cycle in Urban Sewage Pipelines Under High-Temperature and High-Salinity Conditions |
| title_short | Dynamic Modeling of the Sulfur Cycle in Urban Sewage Pipelines Under High-Temperature and High-Salinity Conditions |
| title_sort | dynamic modeling of the sulfur cycle in urban sewage pipelines under high temperature and high salinity conditions |
| topic | dynamic model sulfur cycle phased reaction process sewage pipelines corrosion |
| url | https://www.mdpi.com/2076-2607/13/7/1534 |
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