| 北京市污水处理厂中邻苯二甲酸酯污染水平及其归趋 |
| 摘要点击 3133 全文点击 1370 投稿时间：2012-06-18 修订日期：2012-08-27 |
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| 中文关键词 污水 邻苯二甲酸酯 污染水平 迁移转化 归趋 |
| 英文关键词 wastewater phthalates contamination level transformation fate |
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| 中文摘要 |
| 选取北京市3个污水处理厂为研究对象,采集进厂水、二沉出水和出厂污泥并分析其中的邻苯二甲酸二甲酯(DMP)、邻苯二甲酸二乙酯(DEP)、邻苯二甲酸二丁酯(DBP)、邻苯二甲酸丁基苄基酯(BBP)、邻苯二甲酸二正辛酯(DOP)、邻苯二甲酸二(2-乙基己基)酯(DEHP)浓度. 进厂水水相中DMP、DEP、DBP和DEHP的平均浓度分别为0.98、0.21×102、0.27×102和0.15×102μg·L-1,而BBP和DOP均未检出. 脱水污泥中检出了DBP和DEHP,平均质量浓度(以干重计)分别为0.37 μg·kg-1和0.31×103 μg·kg-1. DMP、DEP、DBP和DEHP的去除效率分别为68.3%~82.6%、94.5%~98.2%、74.7%~95.0%和90.5%~90.7%,主要的去除机制可能是生物降解和向空气挥发. 而二沉池出水和脱水污泥中高浓度的DBP和DEHP值得关注. |
| 英文摘要 |
| Three waste water treatment plants (WWTPs) in Beijing were selected as cases to study the occurrence and fate of phthalates. Contents of di-methyl phthalate (DMP), di-ethyl phthalate (DEP), di-butyl phthalate (DBP), butyl-benzyl phthalate (BBP), di-octyl phthalate (DOP) and di-(2-ehtylhexyl) phthalate (DEHP) in influent, effluent of secondary setting tank and excess sludge in those WWTPs were determined. The mean concentration of DMP, DEP, DBP and DEHP are 0.98, 0.21×102, 0.27×102 and 0.15×102 μg·L-1 respectively. BBP and DOP were not found in those WWTPs. Only DBP and DEHP were detected in dewatered sludge with mean concentration of 0.37 μg·kg-1 and 0.31×103 μg·kg-1 DW. The removal efficiency of DMP, DEP, DBP and DEHP varied from 68.3%-82.6%,94.5%-98.2%,74.7%-95.0% and 90.5%-90.7% respectively. The main removal mechanism should be biodegradation and volatilization to the air. Higher concentration of DBP and DEHP in effluent and dewatered sludge should be concerned. |
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