邻苯二甲酸脂对城镇供水的污染及现行水处理工艺净化效果的评价

目的：了解邻苯二甲酸酯类化合物对城镇供水的污染情况以及再生水处理工艺对该类物质的净化效果。方法：采用处理前、后对照的方法,对源水和出厂水进行检测。色谱分析测试邻苯二甲酸酯类化合物五只异构体。结果：出厂水中邻苯二甲酸二丁酯检出率100％,最高含量达76μg/L。邻苯二二（2－乙基己基）酯检出率50％,最高含量17μg/L;邻苯二甲酸二甲酯、邻苯二甲酸二乙酯和邻苯二甲酸丁基苄酯三只异构体均未测出。源水中邻苯二甲酸酯类化合物的平均含量（G）为19.74μ/L,出厂水18.35μ/L,两者差别无显著意义（P＞0．05）。结论：城镇供水中的邻苯二甲酸酯类化合物污染以邻苯二甲酸二丁酯和邻苯二甲酸二（2－乙基己基）酯为多见。城镇水厂现行水处理工艺对邻苯二甲酸酯类化合物净化效果不佳,去除该类化合物的水处理工艺有待进一步研究和探讨。

Pollution of Municipal Water Supply System by Phthalates and Evaluation on Purification Effects of Current Water Treatment Process

Objective　To understand the pollution of municipal water supply system by phthalates and the purification effects of current water treatment process on phthalates were carried out.Methods　The water samples of source water and finished water were determined for phthalate by comparative method.5 kinds of isomers of phthalate in water samples were detected by gas chromatography technique.Results　In treated water samples the detectable rate and maximum contents in water samples were 100% and 76μg/L for di-n-butyl phthalate,50% and 17 μg/L for di(2-ethylhexyl) phthalate respectively.Di-methyl phthalate,di-ethyl phthalate and butyl benzyl phthalate were not found in water samples.There was no significant difference in geometric means of the contents of phthalates between source water (19.74μg/L) and finished water (18.35 μg/L),P＞0.05.Conclusion　The main pollutants of phthalates were di-nbulyl phthalate and di(2-ethylhexyl) phthalate in municipal water supply system.The effectiveness of removing phthalates from drinking water by current water treatment process in city and town was not satisfied.The water treatment process special for removing phthatates from drinking water should be studied and explored in further.