夏季学生宿舍室内降尘中PAEs污染特征和暴露评价

利用CH2Cl2和超声对35个南开大学学生宿舍室内降尘样品中的DMP、DEP、DBP、BBP、DEHP 和DOP等6种PAES进行提取分离,采用GC-MS定量分析,研究了PAEs污染变化特征及暴露风险.结果表明,南开大学学生宿舍室内降尘中PAEs污染以DEHP和DBP为主,中位值浓度分别为126.916μg/g和123.591μg/g,两者之和占Σ6PAEs浓度的99%以上,室内降尘中PAEs污染程度和类型与室内含增塑剂产品的数量、室内清洁通风情况及成员性别有关;经口暴露水平大于皮肤,其中DBP、DEHP的暴露量高于美国,占人体总PAEs摄入量比例较高,故学生宿舍降尘中PAEs暴露应给予重视.

Pollution characteristics of PAEs derived from indoor settled dust of dormitory and exposure assessment in summer

35 indoor dust samples were collected from Nankai University dormitory. Using CH2Cl2 and ultrasonic extraction for extraction and separation, gas chromatograph-mass spectrometry (GC-MS) method was applied to analyze DMP, DEP, DBP, BBP, DEHP and DOP. And then the pollution characteristics and assessment of human exposure to PAEs from indoor dust were studied. The results showed that DEHP and DBP were the main pollutants from indoor settled dust of Nankai University dormitory, their median concentrations were 126.916 and 123.591μg/g, respectively, the sum accounting for more than 99% of the Σ6PAEs concentration. The phthalate levels and major characteristics were affected by the quantities of phthalate products, cleaning habits, ventilation and the gender of members. The total exposures of PAEs (DBP, DEHP, DEP, BBP) for students through the mouth were higher than the skin. The exposures of DBP and DEHP which were accounted for a higher proportion of the total intake of PAEs were higher in Tianjin than those in USA. The importance of students’ exposure to PAEs in indoor environment should be paid more attention.