化学
羟基自由基
孢子
激进的
硫酸盐
细菌
水溶液中的金属离子
微生物
金属
核化学
生物化学
微生物学
有机化学
生物
遗传学
作者
Gehui Wu,Jingyi Wang,Qiqi Wan,Shumiao Cao,Tinglin Huang,Jinsuo Lu,Jun Ma,Gang Wen
出处
期刊:Water Research
[Elsevier]
日期:2023-09-01
卷期号:243: 120378-120378
被引量:7
标识
DOI:10.1016/j.watres.2023.120378
摘要
Peroxymonosulfate(PMS)-based advanced oxidation process have been recognized as efficient disinfection processes. This study comprehensively investigated the role of sulfate radical (SO4•-) and hydroxyl radical (•OH)-driven disinfection of bacteria and fungal spores by the PMS/metals ions (Me(II)) systems and modeled the CT value based on the relationship between survival and ∫[Radical]dt, with the aim to provide an accurate and quantitative kinetic data of inactivation processes. The results indicated that •OH played a more central role than SO4•- in the inactivation process, and bacteria were more vulnerable to radical attack than fungal spores due to the differences in antioxidant mechanisms and external structures. The k value of •OH -induced inactivation of E. coli was approximately 3-fold higher than that of A. niger, and the shoulder length of •OH -induced inactivation of E. coli was closely 52-fold shorter than that of A. niger after treated with the PMS/Co(II) system. The morphological and biochemical changes revealed that PMS/Me(II) treatment caused membrane damage, intracellular ROS accumulation and esterase activity loss in microorganisms. This study significantly improved the understanding of the contribution of radicals in the process of microbial inactivation by PMS/Me(II) and would provide important implications for the further development of technologies to cope with the highly resistant fungal spores in drinking water.
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