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| 苏州河表层沉积物中邻苯二甲酸酯的分布特征及风险评价 |
| Distribution of Phthalic Acid Esters in Surface Sediments from Suzhou River and Its Risk Evaluation |
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| 基金项目:国家重点基础研究发展规划(973)基金资助项目(2003CB415003)；上海市科委重大科技基金资助项目（09DZ1200107） |
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| 中文摘要: |
| 用GC/MS对苏州河表层沉积物中的6种邻苯二甲酸酯(PAEs)进行了分析。苏州河沉积物中邻苯二甲酸酯为0.98 μg/g~7.72 μg/g，从上游到下游呈升高趋势，市区段含量高于郊区段(平均值分别为6.44 μg/g和1.88 μg/g)，工业污染和城市活动是水环境中邻苯二甲酸酯的主要来源。沉积物中主要检出4种邻苯二甲酸酯，组分分布模式显示双峰特征，峰值出现在邻苯二甲酸双(2-乙基己基)酯(DEHP)和邻苯二甲酸二正丁酯(DBP) ，组分分布特征与不同组分在源释放、降解速率、对沉积物的吸附性能等方面的特性有关。总有机碳是影响沉积物中邻苯二甲酸酯分布的重要因素。与环境风险限值相比，苏州河表层沉积物存在一定的DEHP污染风险。 |
| 英文摘要: |
| Surface sediments were collected from Suzhou River in Shanghai, China and analyzed for 6 kinds of phthalic acid esters(PAEs) by GC/MS. The total concentration range of PAEs in surface sediments was 0.98~7.72 μg/g, with average value of 6.44 μg/g and 1.88 μg/g at cantonal section and suburb section in Shanghai, respectively. PAEs content increasing from upper to downstream Suzhou River implicated that industrial pollution and citizen activity were the main source of PAEs to aquatic environment. 4 kinds of PAEs were detected in sediments and distribution characteristics of PAEs components displayed double peak, with peak values appearing at Di-(2-ethyl) hexyl phthalate(DEHP) and dibutyl phthalate(DBP). The distribution characteristics of PAEs components was associated with some factors, such as the source of PAEs components, physicochemical property of sediments, degradation rate and absorbability of PAEs in sediment, and so on. Correlation analysis showed that TOC content influenced the distribution of PAEs in sediment strongly. The concentration of DEHP was higher than Environmental Risk Limits(ERLs), which implicated that there was some potential ecological risk in surface sediments of Suzhou River. |
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