{"title":"气态次氯酸的自分解和半衰期。","authors":"Tetsuyoshi Yamada, Takashi Muramatsu, Tatsuya Kiriyama, Satoshi Fukuzaki","doi":"10.4265/jmc.28.2_65","DOIUrl":null,"url":null,"abstract":"<p><p>The concentration of the indoor gaseous hypochlorous acid (HOCl <sub>(g)</sub>) varied significantly during disinfection. The kinetics of self-decomposition of HOCl <sub>(g)</sub> was studied at temperatures within the range of 10℃ to 40℃ and relative humidity between 30% RH and 90% RH in a lab-scale confined polyvinylidene fluoride gas bag space. The decay curve of HOCl <sub>(g)</sub> , obtained by plotting the logarithm of the HOCl <sub>(g)</sub> concentration against time, was analyzed using an integrated model that showed two simultaneous first-order processes. One process was assumed to be the adsorption of HOCl <sub>(g)</sub> onto the gas bag surface, whereas the other was the self-decomposition of HOCl <sub><sup>(g)</sup></sub> in the gas space. The decay curve is reduced to the sum of two independent and simultaneous first-order processes. The decay rate constant for self-decomposition depended on temperature and relative humidity. The half-life time of HOCl <sub>(g)</sub> was estimated to be between 76.9 h and 116 h depending on the temperature and relative humidity conditions.</p>","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Self-decomposition and half-life time of gaseous hypochlorous acid.\",\"authors\":\"Tetsuyoshi Yamada, Takashi Muramatsu, Tatsuya Kiriyama, Satoshi Fukuzaki\",\"doi\":\"10.4265/jmc.28.2_65\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>The concentration of the indoor gaseous hypochlorous acid (HOCl <sub>(g)</sub>) varied significantly during disinfection. The kinetics of self-decomposition of HOCl <sub>(g)</sub> was studied at temperatures within the range of 10℃ to 40℃ and relative humidity between 30% RH and 90% RH in a lab-scale confined polyvinylidene fluoride gas bag space. The decay curve of HOCl <sub>(g)</sub> , obtained by plotting the logarithm of the HOCl <sub>(g)</sub> concentration against time, was analyzed using an integrated model that showed two simultaneous first-order processes. One process was assumed to be the adsorption of HOCl <sub>(g)</sub> onto the gas bag surface, whereas the other was the self-decomposition of HOCl <sub><sup>(g)</sup></sub> in the gas space. The decay curve is reduced to the sum of two independent and simultaneous first-order processes. The decay rate constant for self-decomposition depended on temperature and relative humidity. The half-life time of HOCl <sub>(g)</sub> was estimated to be between 76.9 h and 116 h depending on the temperature and relative humidity conditions.</p>\",\"PeriodicalId\":73831,\"journal\":{\"name\":\"Journal of microorganism control\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2023-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of microorganism control\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.4265/jmc.28.2_65\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of microorganism control","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.4265/jmc.28.2_65","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Self-decomposition and half-life time of gaseous hypochlorous acid.
The concentration of the indoor gaseous hypochlorous acid (HOCl (g)) varied significantly during disinfection. The kinetics of self-decomposition of HOCl (g) was studied at temperatures within the range of 10℃ to 40℃ and relative humidity between 30% RH and 90% RH in a lab-scale confined polyvinylidene fluoride gas bag space. The decay curve of HOCl (g) , obtained by plotting the logarithm of the HOCl (g) concentration against time, was analyzed using an integrated model that showed two simultaneous first-order processes. One process was assumed to be the adsorption of HOCl (g) onto the gas bag surface, whereas the other was the self-decomposition of HOCl (g) in the gas space. The decay curve is reduced to the sum of two independent and simultaneous first-order processes. The decay rate constant for self-decomposition depended on temperature and relative humidity. The half-life time of HOCl (g) was estimated to be between 76.9 h and 116 h depending on the temperature and relative humidity conditions.
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