持久性有机污染物的作物吸收及迁移模型研究进展

持久性有机污染物(Persistent Organic pollutant,POPs)是指通过各种环境介质(大气、水、生物体等)能够长距离迁移并长期存在于环境中的人工合成的有机污染物。本文阐述了全球POPs的主要环境过程和各环境介质中POPs的暴露水平,探讨了作物对POPs的吸收过程、吸收机制和生态效应,并基于现有的环境多介质逸度模型和根区水质模型,分析了持久性有机污染物作物吸收过程模拟模型中存在的问题及未来的发展方向。目前,对POPs作物吸收机制及其模拟的研究较少,但随着我国对粮食安全和农业可持续发展的持续关注,这一领域的模拟研究将对科学解析POPs归趋、合理制定风险管控措施和有效确保粮食质量安全等提供重要科学支撑。

Assessment of POPs Absorption in Agriculture Crops Using Migration Models: A Review

Persistent organic pollutants (POPs) are a group of synthetic organic chemicals well known for their persistence nature, bioaccumulation, toxicity, and potential for long-range transport in the available environment. This study reviewed the major environmental processes and potential exposures of POPs via agriculture crops uptake since the twentieth century. The worldwide-using POPs transfer mechanisms and ecological effects on crop uptakes were summarized. The limitations of existing models and the enhancement of crop absorption models were explored using multi-media fugacity and root zone water quality models. Further, detailed scientific information regarding mechanism and simulation via crop uptakes were provided to understand the overall environmental fate, reasonable risks and control measures of POPs so as to effectively ensure the food safety with sustainable agriculture development.