天然水体中胶体颗粒物与内分泌干扰物的微界面作用机制研究

项目名称： 天然水体中胶体颗粒物与内分泌干扰物的微界面作用机制研究

项目编号： No.21277133

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 环境科学、安全科学

项目作者： 刘瑞霞

作者单位： 中国环境科学研究院

项目金额： 80万元

中文摘要： 天然水体中粒度在1nm到1μm的胶态粒子，由于其特殊的物理化学性质，在各类物质的生物地球化学循环、聚集和沉降以及微量污染物的迁移、转化、归宿和生态毒理中起着重要的作用。EDCs是一类对生物体包括人体具有内分泌干扰作用的持久性有毒有害物，在我国许多的水域中都有不同种类和浓度的检出。本项目就是围绕着天然水体胶态颗粒物在污染物的环境行为中的作用问题，深入开展几种EDCs在胶态粒子界面上的复杂反应机制研究。采用多种仪器分析手段探讨胶体颗粒的物化特性并考察目标EDCs在各胶体界面上的吸附热、动力学特性以及微观作用机制，在此基础上建立相互作用机理模式及动力学模型。通过研究，明确目标EDCs界面吸附特性与胶体颗粒物化特性的定性定量关系及内在影响因素，揭示各胶体组分与目标EDCs的界面反应过程、反应机理及形态转化。该项目研究对预测EDCs的水环境行为具有重要的指导作用。

中文关键词： 天然胶体颗粒；内分泌干扰物；相互作用；微观作用机制；吸附热动力学过程

英文摘要： Natural waters are complex systems. In terms of the component size, they are composed of solutes, dissolved organic matters, trace pollutants, colloidal and particulate materials including organic matter and inorganic minerals, as well as microorganisms. Natural aquatic colloids are usually defined as naturally occurring particles with one dimension in the size range 1 nm and 1μm. It is becoming increasingly apparent that natural colloidal materials play a crucial role as an intermediary in environmental and biogeochemical processes e.g. C, N and P cycling, aggregation and sedimentation, as well as pollutant fate, transport and ecotoxicology. Despite the obvious importance there is a lack of quantitative understanding of the structure of aquatic colloids and how this relates to their environmental 'function' in regulating trace pollutant behavior. Numerous studies have been performed on the sorption of highly hydrophobic organic chemicals (HOCs) onto sediments (or soil). In comparison, natural colloid study is only limited to the phase distribution of trace metals. Of particular environmental concern are the so-called endocrine disrupting chemicals (EDCs), which may be defined as "exogenous substances that cause adverse health effects in an intact organism or its progeny, consequent to endocrine function". It

英文关键词： Aquatic colloids；Endocrine disrupting chemicals；Interactions；Adsorption thermodynamics；Kinetics