塘西河沉积物中有机磷酸酯的污染现状及来源解析

Pollution status and source appointment of organophosphate esters in sediments of Tangxi River

采集了合肥塘西河的沉积物样品,并检测了其中7种有机磷酸酯(OPEs)的浓度,对其时空分布特征及来源进行了探讨。结果表明,所有样品中均检测到了OPEs,其总质量浓度为10.81~131.96ng/g。氯代OPEs是塘西河沉积物中的主要成分,平均质量浓度为28.07ng/g。监测数据显示,由于河道清淤的影响,塘西河沉积物中OPEs的浓度在研究期间内呈现下降的趋势。从空间分布来看,塘西河沿程OPEs浓度最高点位于中游,明显受到周边城市、工业区和污水排放的影响。通过主成分分析推测,塘西河沉积物中的OPEs可能主要来自于生活、生产活动中产品使用和加工过程中的释放,以及建筑装修材料中的相关物质的释放。

In this study,sediment samples from Tangxi River in Hefei City were collected.The concentrations of7 kinds of organophosphate esters（OPEs）were examined,and their temporal and spatial distribution characteristics and sources were discussed.The results showed that OPEs were detected in all samples with a total concentration of10.81-131.96 ng/g.Chlorinated OPEs was the main components in the sediments of Tangxi River,with an average concentration of 28.07 ng/g.The monitoring data showed a decreasing trend of OPEs concentration in the sediments of Tangxi River due to desilting.In terms of spatial distribution,the OPEs had a higher concentration in the middle reach of the river,which was obviously affected by the surrounding industrial areas and wastewater discharge.Through principal component analysis,it was speculated that the OPEs in Tangxi River sediments mainly came from the production and use of products in life and processing,and some of the OPEs came from relevant materials used in construction and decoration.