我国城市污泥中邻苯二甲酸酯的研究

A study of phthalic acid esters (PAEs) in the municipal sludges of China

应用GC/MS对我国内地和香港共11个城市污泥中的6种U.S. EPA优控的邻苯二甲酸酯化合物(PAEs)进行了研究.各城市污泥中邻苯二甲酸酯化合物的总含量(∑PAEs)在10.465~114.166mg/kg之间,多数在20mg/kg左右.分子量较低的邻苯二甲酸二甲酯(DMP)、邻苯二甲酸二乙酯(DEP)、邻苯二甲酸正二丁酯(DnBP)和邻苯二甲酸丁基苄基酯(BBP)在所有的城市污泥中均检测到,但多数含量较低(小于1.0mg/kg).邻苯二甲酸正二辛酯(DnOP)在少数城市污泥中未检测到,但在其他城市污泥中的含量都较高.邻苯二甲酸(2-乙基己基)酯(DEHP)仅在个别城市污泥中检测到,且含量较低.各城市污泥中的邻苯二甲酸酯都是以个别化合物为主,显示出不同的分布特征.污泥中邻苯二甲酸酯化合物的种类和含量与污水来源、污水处理方式、污泥类型、化合物的结构和理化性质等因素有关.

Six phthalic acid esters classified as U.S. EPA priority PAEs compounds, in eleven municipal sludges of China were studied with GC-MS. The total content of phthalic acid esters (ΣPAEs) ranged from 10.465 to 114.166 mg/kg, mainly around 20mg/kg. PAEs with lighter molecular weight such as dimethyl phthalate (DMP), diethyl phthalate (DEP), di-n-butyl phthalate (DnBP), and butyl-benzyl phthalate (BBP) were detected in all the sludges, but their contents were generally less than 1.0mg/kg. Although di-n-octyl phthalate (DnOP) was not detected in some sludges, its contents were higher in others. di-(2-ethylhexyl) phthalate (DEHP) was detected in few sludges with lower content. Only individual PAEs compounds were predominant in each sludge, which exhibited different distribution characters. The types and contents of PAEs compounds in the sludges were related to the sources and treating methods of wastewater, sludge types, physical-chemical properties and the structures of PAEs compounds.