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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Raw water treatment with Cl-2 and ClO2: comparison of two major class of disinfection by-products formation
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Raw water treatment with Cl-2 and ClO2: comparison of two major class of disinfection by-products formation

机译：用Cl-2和Clo2的原水处理：两种主要类消毒副产品的形成比较

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摘要

Epidemiological studies have demonstrated the cellular toxicity of trihalomethanes (THMs) and haloacetic acids (HAAs) that usually form during water treatment with chemical chlorine disinfectants such as chlorine and chlorine dioxide. THMs and HAAs formation potential of organic precursor in a surface water source for water treatment with Cl-2 and ClO2 was studied with reference to key determinants. It was observed that the concentration of THMs and HAAs formed during ClO2 treatment was significantly lower than that formed during Cl-2 treatment concentration that formed during chlorination. HAAs, dominated with bromo-HAAs were predominantly formed with a negligible amount of THMs during ClO2 treatment. The combined total of HAAs and THMs formed during chlorine dioxide treatment was only 10-21% of that formed for chlorination. Among the HAAs species, dibromoacetic acid accounted for 86% of total HAAs during chlorine dioxide treatment whereas dichloroacetic acid (36.7%) followed by dibromoacetic acid (20.4%) and bromochloroacetic acid (16.9%) were major constituent formed during chlorination. Species shift towards more toxic bromo-HAAs may pose a concern on shifting water treatment from chlorine to chlorine dioxide, particularly for bromide-containing water.
机译：流行病学研究已经证明了三卤代甲烷（THM）和卤代乙酸（HAAs）的细胞毒性，其通常在水处理过程中使用化学氯消毒剂如氯和二氧化氯。研究了与Cl-2和ClO2水处理的表面水源中有机前体的ZHM和HAAS形成电位，并参考关键决定簇。观察到，在ClO2处理期间形成的THM和HAAs的浓度明显低于在氯化期间形成的Cl-2处理浓度期间形成的浓度。与Bromo-HAAs主导的HAAS主要形成CLO2治疗期间的忽略量的忽略量。二氧化氯处理期间形成的HAAs和THM的总和仅为氯化形成的10-21％。在HAAS种类中，二溴乙酸在二氧化氯处理期间占HAA的86％，而二溴乙酸（36.7％），其次用二溴乙酸（20.4％）和溴氯乙酸（16.9％）是在氯化过程中形成的主要成分。物种转向更多有毒的Bromo-Haas可能会对从氯化氯的水处理转移到二氧化氯，特别是含溴水溶液的担忧。

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