不同城市功能区土壤中酞酸酯污染特征

对天津市和辽宁省鞍山市不同城市功能区以及不同工业类型所在地共计12个土壤样品进行采样调查,采用气相色谱-质谱联用仪(GC-MS)对样品中15种酞酸酯类化合物进行分析测定,研究了两市土壤样品中酞酸酯的污染水平,分析了不同城市功能区以及石化、化工、钢铁等工业行业所在地土壤中酞酸酯的浓度差异,研究了不同酞酸酯类化合物的单体污染特征,将两市土壤样品中DBP和DEHP的浓度与国内外部分城市进行了比较,分析了产生上述结果的原因。结果表明,天津市各采样点总酞酸酯(ΣPAEs)浓度在0.524～2.058 mg/kg之间,鞍山市各采样点ΣPAEs浓度在0.779~2.016 mg/kg之间;两城市不同城市功能区土壤ΣPAEs浓度均呈现风景区<生活区<工业区的趋势;15种酞酸酯中,DBP和DEHP在天津市和鞍山市各采样点土壤样品中均有检出,为两城市土壤中酞酸酯主要污染物,其浓度值与国内其它城市处于同一污染水平,略高于我国贵州地区。

Pollution Features of Phthalates in Soils with Different Urban Functions

15 kinds of phthalates(PAEs) in 12 samples of soils from different functional areas and different industries in Tianjin and Anshan,Liaoning were analyzed by gas chromatography-mass spectrometry(GC-MS).The concentrations of PAEs in soils of different functional areas and soils from petrochemical,chemical,steel industries were analyzed,and characteristics of different kinds of PAEs were studied.Concentrations of DBP and DEHP were compared with other cities in China and abroad,the reasons for the difference of PAEs concentrations in soil of Tianjin and Anshan were discussed.Results indicated that concentrations of PAEs in soil are 0.524~2.058 mg/kg in Tianjin and 0.779~2.016 mg/kg in Anshan,with the highest concentrations of PAEs in industrial areas,and the lowest concentrations in scenic spots.DBP and DEHP which have been detected in all soil samples are primary PAEs in soil of Tianjin and Anshan,whose concentrations are almost equal with other cities in China and slightly higher than Guizhou Province.