持久性有机污染物环境地球化学调查研究进展与展望

    Research progress and prospect of environmental geochemical investigation of persistent organic pollutants

    • 摘要: 持久性有机污染物(pervistent organic pollatants, POPs)环境地球化学调查是分析掌握POPs化学性质、迁移转化、环境归趋的重要手段。基于文献对近年来POPs的环境地球化学调查研究进展进行了综述,总结出以下3个方面的结论: ①POPs普遍具有环境难降解、长距离迁移性、生物蓄积性和高生物毒性等特征,POPs浓度数据在世界各地不同环境中介质中被广泛报道,随着历史累积和持续释放,POPs已经成为危害生态系统、人类健康的重要风险,已有调查监测数据显示,当前我国部分水、土检测样品POPs浓度水平较高; ②POPs可在大气-水体-沉积物或者大气-土壤等不同环境界面中相互迁移,进而污染地下水并迁徙到地表系统的每个角落,这种迁移转化与POPs成分及环境介质的物理化学性质、温度、pH值等因素密切相关; ③当前,我国相关机构对大气、水体、土壤和底泥等环境介质中的部分POPs类型缺少连续系统的调查监测,难以对POPs污染状况、长周期变化规律进行系统分析研究。建议今后应当加强大气-土壤-水界面长周期动态监测工作,进一步完善POPs的监测、分析方法标准方法,并开展系统的环境地球化学综合分析研究,为实施环境污染防治和生态修复提供理论和实践支撑。

       

      Abstract: The environmental geochemical survey of persistent organic pollutants (POPs) is an important mean to study and master its chemical properties, migration, transformation and environmental fate. Three inclusions were summarized based on the research progress of environmental geochemical investigation and research of POPs in recent years. ① POPs generally have characteristic of environmental refractory, long-distance migration, bioaccumulation and high biological toxicity, and the concentration data of POPs have been widely reported in different environmental media around the world. The POPs have become an important risk that endangers ecosystems and human health, with the historical accumulation and continuous release. According to the existing survey and monitoring data, the concentration levels of POPs from test samples of partial water bodies and soil are currently high in China. ② POPs can migrate among different environmental interfaces such as atmosphere-water-sediment or atmosphere-soil, then it can contaminate ground water and migrate to every corner of the surface system. This migration and transformation are closely related to the composition of POPs and the physical and chemical properties, temperature, pH and other factors of the environmental medium. ③ there is a short of continuous and systematic investigation and monitoring about some types of POPs in environmental media such as the atmosphere, water bodies, sediment, and soil, the relevant institutions in China, which results in difficult systematic analysis and research on the pollution levels and long-term changes of POPs. It is suggested that the long-term dynamic monitoring of the atmosphere soil water interface should be strengthened and the monitoring and analysis methods, standards and methods of POPs should be improved. The systematic environmental geochemical comprehensive analysis and research also should be carried out to provide theoretical and practical support for the implementation of environmental pollution prevention and ecological restoration.

       

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