北京公园水体中邻苯二甲酸酯类物质的测定及其分布特征

为了正确评估北京市公园水体受PAEs污染的程度,采集了北京11个公园湖水的水样,采用固相萃取-气相色谱联用技术检测了其中六种邻苯二甲酸酯类物质(PAEs)的含量,该方法加标回收率在73%～89.3%,RSD为5.9%～18.1%,检出限在0.40～4.58mg/L。实验结果为北京公园水体中总PAEs浓度在6.4～138.1μg/L,平均值为27.9μg/L,证明北京公园水体受到不同程度的PAEs污染,主要的污染物为邻苯二甲酸二丁酯(DBP)和邻苯二甲酸双(2-乙基己基)酯(DEHP),其中东南部以及西北部的公园污染较严重。分析了PAEs在公园湖水底泥中和水体中的分布特征,结果显示,PAEs在湖水底泥中的含量明显大于在水体中的含量。

The Determination and Distribution Characteristics of Phthalate Esters in Beijing Park Lakes

A solid phase extraction-gas chromatography method was developed for detecting the concentration of six phthalate esters (PAEs) in water samples which were collected from 11 parks in Beijing. By using the proposal method,the recoveries of PAEs were 73%~89.3%,the relative standard deviations were 5.9%~18.1%,and the detection limits were 0.40~4.58mg/L. The experiments demonstrated that the parks in Beijing were polluted by PAEs in different degrees. The distribution characteristics of PAEs were analyzed,found that the concentrations of PAEs in soil is obviously larger than in water. The causes,preventions and resolve measures of PAEs pollutions in Beijing parks were investigated.