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目的了解广州市饮用水中双酚A、邻苯二甲酸二乙酯和邻苯二甲酸二丁酯的污染现状。方法于2014年的枯水期(1—2月)、春季平水期(3—4月)、丰水期(5—8月)和秋季平水期(9—10月),采集广州市现有7家市政水厂的水源水、出厂水及管网末梢水各28份,采用液相色谱-质谱法(LC/MS)进行双酚A(BPA)、邻苯二甲酸二乙酯(DEP)和邻苯二甲酸二丁酯(DBP)含量的测定。结果水源水、出厂水和管网末梢水全部水样的DBP含量超标,出厂水和管网末梢水全部水样的BPA和DEP含量达标,水源水中BPA和DEP均有检出;水源水丰水期BPA含量低于枯水期(P<0.05)和秋季平水期(P<0.01),水源水丰水期DEP含量低于秋季平水期(P<0.01);出厂水和管网末梢水中BPA含量均低于水源水(P<0.01),管网末梢水中DEP含量高于水源水(P<0.05),出厂水和管网末梢水中DBP含量均高于水源水(P<0.01)。结论广州市饮用水中DBP的含量较高,应结合不同水处理工艺采取控制措施。
Objective To understand the pollution status of bisphenol A, diethyl phthalate and dibutyl phthalate in drinking water in Guangzhou. Methods Six dry landfills (January-February), spring (April-April), spring (May-August) and autumn (September-October) Municipal water plant water source water, factory water and pipe network water each 28, the use of liquid chromatography - mass spectrometry (LC / MS) for bisphenol A (BPA), diethyl phthalate (DEP) Determination of dibutyl phthalate (DBP) content. Results The DBP content of all water samples of water source water, ex-factory water and pipe network exceeded the standard. The BPA and DEP contents of all water samples of the ex-factory water and the pipe network reached the standard, and both BPA and DEP were detected in the water source water. The content of BPA in period water was lower than that in dry season (P <0.05) and in autumn (P <0.01), and the content of DEP in wet season was lower than that in autumn (P <0.01) In the source water (P <0.01), the content of DEP in the water of the pipe network was higher than that of the source water (P <0.05). The DBP content in the water of the factory and the pipe network was higher than that of the source water (P <0.01). Conclusion The content of DBP in drinking water of Guangzhou City is relatively high, and control measures should be taken in combination with different water treatment processes.