深圳市水厂水中邻苯二甲酸二酯污染状况分析

Analysis of di-2 ethylhexyl phthalate pollution in treated drinking water in Shenzhen

目的:分析近年监测深圳市各主要水厂出厂水中邻苯二甲酸二(2-乙基己基)酯(DEHP)的污染状况及其变化规律性。方法:从2008年起每年采集雨季和旱季的出厂水,用氢火焰离子化气相色谱法(GC-FID)测定其DEHP含量。结果:各主要水厂出厂水DEHP合格率每批次都在90%以上,DEHP污染水平随季节气候变化呈现周期性波动,雨季较高旱季较低,且在东南部地区水厂中有逐年增高的趋势。结论:深圳市出厂水DEHP污染总体水平在国家标准限量内,其波动性明显受季节气候影响,较高的气温和降雨有利于DEHP的迁移和进入饮用水,水厂的生产需要有针对性的预防处理措施。

Objective ：To understand the pollution condition and change rules of di -2 ethylhexyl phthalate（ DE- HP） in treated water of water plants in Shenzhen based on water quality monitoring of recent years. Methods： The drinking water of 53 water plants were collected in both the rainy and dry seasons of each year since 2008 and their DEHP levels were measured with the gas chromatography- flame ionization detector（ GC- FID ）. Results： In each batch of drinking water, the DEHP level pass rate exceeded 90% in the main water plant. The DEHP pollution level performed cyclical fluctuations with the seasonal climate changes, higher levels in rainy seasons and lower levels in dry seasons, and there was an increasing trend year by year in water plants of southeast area. Conclusion： The o- verall level of DEHP contamination in treated drinking water of Shenzhen was in line with national standards of Chi- na. Its cyclical fluctuations were significantly affected by seasonal climate, higher temperatures and rainfall condu- cive to the migration of DEHP into the drinking water. Water treatment plant production needs to take targeted prophylactic treatment measures.