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采用氯气消毒是国内饮用水最主要的消毒方式,但氯与水中的有机物反应生成的很多消毒副产物对人体有直接或间接的危害。消毒副产物中的卤乙酸已经被证实对嗫齿类动物有致癌、致畸变、致突变作用,其致癌风险占消毒副产物总致癌风险的90%以上,已经被美国EPA定义为人类潜在的致癌物。氯乙酸,即指β-碳原子上的一个或多个氢原子被氯原子取代的乙酸,是卤乙酸的主要形式。其中二氯乙酸(DCA)和三氯乙酸(TCA)含量最高,致癌风险最大,其
Chlorine disinfection is the most important method of disinfection of domestic drinking water, but many disinfection by-products generated by the reaction of chlorine and organic substances in water have a direct or indirect harm to the human body. Haloacetic acid in disinfection by-products has been shown to cause carcinogenic, mutagenic and mutagenic effects on denture. The carcinogenic risk accounts for more than 90% of the total carcinogenic risk of disinfection by-products and has been defined by the U.S. EPA as a potential human carcinogen Things. Chloroacetic acid, the acetic acid in which one or more hydrogen atoms on the beta-carbon atom is replaced by a chlorine atom, is the predominant form of haloacetic acid. Among them, the content of DCA and TCA is the highest, which has the highest carcinogenic risk.