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首页> 外文期刊>American Journal of Analytical Chemistry >Evolution and Fate of Haloacetic Acids before and after Chlorination within the Treatment Plant Using SPE-GC-MS
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Evolution and Fate of Haloacetic Acids before and after Chlorination within the Treatment Plant Using SPE-GC-MS

机译：使用SPE-GC-MS处理工厂内氯化前后卤代乙酸的演变和命运

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摘要

The previous research on the occurrence of disinfection by-products (DBPs) in drinking water has focused on trihalomethane (THMs) formation and evolution, in particular within distribution systems. In this study, the variability of occurrence of haloacetic acids (HAAs) before and after treatment was investigated. The investigation focused on point–to-point fluctuations of HAAs in different treatment stages within the treatment plant. The research was also carried out to find out the possible sources for the presence of HAAs before chlorination in the raw water. The results showed that the presence of HAAs from the raw water point until the filtered water occurred due to industrial waste and sewages. Subsequent formation of HAAs from treated point until service reservoir due to disinfection. The HAAs concentration was the highest and most variable in the plant where level of DBP precursor indicators and the chlorine dose were both higher. However, HAAs level and in particular dichloroacetic acids (DCAA) (the preponderant HAAs species in the waters under study), trichloroacetic acids (TCAA) decreased dramatically during filtration, very probably because of the biodegradation within the filter. An ANNOVA test was used to evaluate the level of significance of HAAs between treated water and service reservoir outlet water.
机译：以前关于饮用水中消毒副产物（DBP）发生的研究集中在三卤甲烷（THM）的形成和演化，特别是在分配系统内。在这项研究中，研究了治疗前后卤代乙酸（HAAs）发生的变异性。研究集中在处理厂内不同处理阶段的HAA的点对点波动。还进行了研究，以寻找在原水中氯化之前存在HAAs的可能来源。结果表明，从原水点到过滤水的过程中，HAAs的存在是由于工业废物和污水造成的。由于消毒，从处理点到服务储层的HAAs随后形成。在DBP前体指标水平和氯剂量均较高的工厂中，HAAs浓度最高且变化最大。但是，HAA含量，尤其是二氯乙酸（DCAA）（正在研究的水中主要的HAAs种类），三氯乙酸（TCAA）在过滤过程中急剧下降，这很可能是由于过滤器内的生物降解所致。使用ANNOVA测试来评估处理后的水和服务水库出口水之间的HAA显着性水平。

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