常规水处理工艺多环芳烃和邻苯二甲酸酯变化分布

以多环芳烃(PAHs)(包括萘、蒽、荧蒽三种物质)和邻苯二甲酸酯(PAEs)(包括邻苯二甲酸二甲酯(DMP)、邻苯二甲酸二乙酯(DEP)、邻苯二甲酸二异丁酯(DIBP)、邻苯二甲酸二(2-乙基己基)酯(DEHP)4种物质)作为研究对象,采用GC-MS方法测定了以长江为原水的某大型城市给水厂各工艺段水样中的上述物质.结果表明,7种物质均有检出,但含量均在纳克级,两种常规的水处理工艺对PAHs的控制有一定的效果,对PAEs的控制作用则相当有限.滤后水经加氯消毒、二次加压等工序后,水中的PAHs和PAEs略有增加.

Distribution and transformation of polycyclic aromatic hydrocarbons and phthalic acid esters in conventional water purification processes

Gas chromatograph/mass spectrometer (GC/MS) system was used to analyze polycyclic aromatic hydrocarbon (PAHs, including naphthalin, anthracene and fluoranthene) and phthalic acid ester PAEs, including dimethyl phthalate (DMP), diethyl phthalate (DEP), diisobutyl phthalate (DIBP) and di(2-ethylhexyl) phthalate (DEHP)] concentration in water samples taken from every treatment units of a large-scale waterworks in a western city whose water source is the upstream of Yangtze river. As a result, above-mentioned seven substances were detected, but content of them were all on the level of nanograde. Two conventional treatment processes could decrease PAHs concentration of effluent to some extent, but reduction effect to PAEs is limited. PAHs and PAEs concentration in filtration-treated water would rise slightly after disinfection (by chlorine).