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近年来,关于饮水净化和氯消毒后产生的有机氯化物,如氯仿、四氯化碳、二氯乙烷、三氯乙烯、四氯乙烯、一溴二氯甲烷、二溴一氯甲烷等的问题有很多文献报道。等一致认为饮水氯消毒会使游离氯与水源中的有机物作用而生成卤化物。特别值得注意的是在饮水中最易产生和量最多的氯仿的生成。Fulding等认为有机物在饮水中的一般含量不超过20 mg/l,其中大部分为天然有机物。但人为的有机物明显地具有较大的潜在危险性。Kaizer等认为饮水处理过程中作为混凝剂的高分子聚合物可能是生成氯仿的来源之一。Voussefi等在实验中发现当pH为7.0和温度为22℃时水中天然存在的如D-葡萄糖、鞣酸、腐植酸、香草酸和五倍子酸能在游离氯
In recent years, on the purification of drinking water and chlorine generated after the organic chloride, such as chloroform, carbon tetrachloride, dichloroethane, trichlorethylene, tetrachlorethylene, bromine dichloromethane, dibromochloromethane and the like There are many problems reported in the literature. They all agreed that drinking water chlorine disinfection will make free chlorine and water in the role of organic matter and generate halide. Of particular note is the most easily produced in the drinking water and the largest amount of chloroform generation. Fulding, etc. that the general content of organic matter in drinking water does not exceed 20 mg / l, most of which are natural organic matter. However, man-made organisms obviously have a greater potential risk. Kaizer et al. [1] considered that the polymer used as coagulant in drinking water treatment may be one of the sources of chloroform production. In experiments, Voussefi et al. Found that D-glucose, tannic acid, humic acid, vanillic acid and gallic acid naturally present in water at a pH of 7.0 and a temperature of 22 ° C can hydrolyze free chlorine