南京某城市污水二级处理系统中酞酸酯类的分布及去除特征  

Distribution and removal characteristics of PAEs in secondary sewage process systems in a municipal sewage plant in Nanjing

作　　者：孔祥吉[1,2] 单正军[1,2] 许静[1,2] 郭敏[1,2] 张雪梅[3] 孔德洋[1,2] 

机构地区：[1]环境保护部南京环境科学研究所,南京210042 [2]国家环境保护农药环境评价与污染控制重点实验室,南京210042 [3]江苏省计量科学研究院,南京210007

出　　处：《环境工程学报》2014年第1期157-161,共5页Chinese Journal of Environmental Engineering

基　　金："驯化底泥降解尾水中微污染有机物的效能研究"-环境保护部南京环境科学研究所中央级公益性科研院所基本科研业务专项

摘　　要：以南京某城市污水厂污水和污泥中的酞酸酯类(PAEs)为研究对象,分别采用固相萃取-气相色谱-质谱联用(SPE-GC-MS)和超声提取-气相色谱-质谱联用(USE-GC-MS)检测其中的优先控制污染物邻苯二甲酸二甲酯(DMP)、邻苯二甲酸二乙酯(DEP)、邻苯二甲酸二丁酯(DBP)和邻苯二甲酸单(2-乙基己基)酯(MEHP),研究其在厌氧/好氧(A/O)污泥处理过程中的分布特征及降解规律。研究结果表明,各类PAEs在该污水厂的污水和污泥中均有检出,二级处理出水中4种酞酸酯类物质的浓度在0.151~2.419μg/L。污水中4种酞酸酯的分布规律为MEHP>DBP>DMP>DEP,污泥中4种酞酸酯的分布规律为MEHP>DBP>DEP>DMP。该污水厂二级处理工艺对4种PAEs的去除效果较明显,去除效率DBP>DEP>DMP>MEHP。Used phthalate acid esters （PAEs） as analyzed objects, SPE-GC-MS and USE-GC-MS tech- niques were adopted respectively to detect some of the priority controlled ones, such as dimethyl phthalate （DMP） ,diethyl phthalate（ DEP）, dibutyl phthalate （ DBP）, and mono-（2-ethylhexyl） phthalate （MEHP） in sewage and sludge samples in a sewage treatment plant in Nanjing, so as to achieve their distribution characteris- tics and degradation rules during the sludge A/O process. It was indicated that all of these object PAEs were found in the sewage and sludge in the sewage treatment plant. The concentration of the studied PAEs in the efflu- ent from the secondary treatment system was 0. 151 ~ 2. 419 p^g/L. The concentration order of them in the efflu- ent was MEHP 〉 DBP 〉 DMP 〉 DEP, and in the sludge it was MEHP 〉 DBP 〉 DEP ~ DMP. It was indicated that the four PAEs were removed effectively by the secondary processing in the plant, and their removal efficiencies order was DBP 〉 DEP 〉 DMP 〉 MEHP.

关 键 词：城市生活污水 酞酸酯 活性污泥法 去除特征 

分 类 号：X502[环境科学与工程—环境工程]