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我国大多数水厂都用液氯消毒,近些年也有一些小型水厂陆续采用二氧化氯消毒。二氧化氯消毒产生亚氯酸盐和氯酸盐等无机产物,其中亚氯酸盐有较大的毒性,应给以足够的重视。 1 二氧化氯消毒的副产物二氧化氯消毒灭菌效果好,有机副产物少,毒性较轻,其主要无机副产物为亚氯酸盐(ClO_2~-)、氯酸盐(ClO_3~-)等,其中亚氯酸盐毒性较大,可能对血液中红细胞有影响,国外研究雌鼠饮用含有高浓度亚氯酸盐的水,产生的幼鼠体重轻,并有死胎。卫生部2001年颁布的《生活饮用水水质卫生规范》非常规检验项目中规定,用二氧化氯消毒时,亚氯酸盐残留不超过0.2mg/L。
Most of our water treatment plants are disinfected with liquid chlorine. In recent years, some small-scale water treatment plants have also adopted chlorine dioxide disinfection. Chlorine dioxide disinfection produce inorganic products such as chlorite and chlorate, chlorite which has greater toxicity, should give sufficient attention. A chlorine dioxide disinfection by-product of chlorine dioxide disinfection and sterilization effect, less organic by-products, less toxic, the main inorganic by-products of chlorite (ClO_2 ~ -), chlorate (ClO_3 ~ -) Among them, chlorite toxicity, which may have an impact on the blood of red blood cells, foreign research female rats drinking water containing high concentrations of chlorite, resulting in young rats with light weight and stillbirth. Ministry of Health promulgated in 2001, “Drinking Water Quality Health norms” unconventional test project provides that chlorine dioxide disinfection, chlorite residue does not exceed 0.2mg / L.