宁夏地区饮用水中4种邻苯二甲酸酯类污染现状研究

Investigation of Phthalates Pollution in Drinking Water in Ningxia

目的了解宁夏地区饮用水中邻苯二甲酸酯类(PAEs)物质的污染现状。方法于2009年4月,采集宁夏地区5个市(A～E市)共7个水厂的水源水、出厂水和管网末梢水以及4个县(F～I县)的农村窖水水样进行邻苯二甲酸二丁酯(DBP)、邻苯二甲酸二乙酯(DEP)、邻苯二甲酸二(2-乙基己基)酯(DEHP)和邻苯二甲酸二甲酯(DMP)含量的测定。结果宁夏地区城市饮用水中DBP、DEP、DMP和DEHP的检出范围分别为0.181～3.656、0.622～3.181、<0.03～3.673、<0.03～7.675μg/L。A市、B市和C市所采集的水样中主要的PAEs为DBP和DEP,其水源水、出厂水、管网末梢水中均有DBP被检出,且在水源水和管网末梢水中DBP含量较高,而在出厂水中其含量较低;DMP和DEHP在各种水样中也有被检出,但均未超标。D市水厂和E市水厂的水源水、出厂水、管网末梢水中均未检出DBP、DEP、DMP和DEHP。宁夏地区农村水窖水水样中主要的PAEs为DBP和DEHP,其含量范围分别为0.407～3.811和<0.03～2.522μg/L,且所有检测水样中均检出DBP。仅在F县的2个采样点水窖水中检测出DMP和DEP,含量范围分别为2.607～5.401和<0.06～0.759μg/L。结论宁夏地区饮用水中PAEs污染物目前以DBP和DEHP为主。

Objective To investigate phthalates pollution in drinking water in Ningxia.Methods The predominant phthalate esters in drinking water samples from 5 cities and village cellar water from 4 counties were determined in April,2009.Results DBP,DEP,DMP and DEHP were found in the water samples of city waterworks in Ningxia,ranged from 0.181 to 3.656 μg/L,from 0.622 to 3.181 μg/L,from 0.03 to 3.673 μg/L,from 0.03 to 7.675 μg/L,respectively.Di-butyl phthalate（DBP） and diethyl phthalate（DEP） in A,B and C city of water samples,and di-butyl phthalate（DBP） was found in all water samples of city waterworks,the source water and tap water,but the level was higher in the latter two.DMP and DEHP were detected without over standard.DBP,DEP,DMP and DEHP were not found in all water samples of D and E city waterworks.DBP and DEHP in village cellar water in Ningxia ranged from 0.407 to 3.811 μg/L and from 0.03 to 2.522 μg/L respectively,and DBP could be detected in all water samples.DMP and DEP were detected only in F1 and F2 of cellar water,ranged from 2.607 to 5.401 μg/L and from 0.06 to 0.759 μg/L respectively.Conclusion The investigation indicates that the dominant pollutants in drinking water in Ningxia province of phthalates are DBP and DEHP.