大气中典型多氟化物的区域迁移转化与气/颗粒两相分配研究

项目名称： 大气中典型多氟化物的区域迁移转化与气/颗粒两相分配研究

项目编号： No.41273107

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 陈来国

作者单位： 环境保护部华南环境科学研究所

项目金额： 75万元

中文摘要： 部分多氟化物（PFCs）是新型受控POPs，在中国环境、生物和人体中PFCs含量较高。科学界对于PFCs的长距离迁移转化机制还存在争论，大气是PFCs扩散的重要媒介，气/颗粒两相分配是PFCs大气迁移转化的决定性因素。由于其独特的理化性质（如表面活性），PFCs的气/颗粒两相分配机制和表征模型不同于其它"传统"POPs（如PAHs, PCBs），是大气PFCs研究的重点和难点之一，相关研究还比较薄弱。本项目选取珠三角地区为研究区域，在解决传统主动采样技术带来的实测偏差的基础上，研究PFCs在珠三角区域的大气迁移转化过程，探讨气/颗粒两相分配机制，研究利用或修订现有新模型表征PFCs气/颗粒两相分配。研究成果可为进一步探究PFCs的环境地球化学过程提供基础资料，还可扩展应用于其它表面活性剂的环境行为研究。

中文关键词： 全氟化合物；分析；粒径分布；区域迁移；气-颗粒相分配

英文摘要： Several kinds of polyfluorinated compounds (PFCs) have been listed as restricted POPs. The contents of PFCs are relatively high in environment, biology and human body in China. Some published results have indicated great controversy on the long range transporting and transforming mechanism of PFCs. The PFCs' behavior in atmosphere is critical and their partitioning between gas and particle phases plays a crucial role in the process of their transport and transformation. Due to their unique physicochemical properties, such as surface activity, partitioning mechanism of PFCs between gas and particle phases was reported to be different from and much more complicated than those of PAHs, PCBs, etc. Very few studies have reported the mechanism and models for the partitioning of PFCs. In this study, we will firstly evaluate the bias of active sampling technique. Based on this evaluation, we will conduct the study regarding the atmospheric transport and transformation of PFCs in the Pearl River Delta (PRD) area, and discuss the partitioning mechanism of PFCs between gas and particle phases. Moreover, we will use or revise the present new models for further elucidating the PFCs' atmospheric behavior in this area. The results of our study will provide the basic data for further studying environmental and geochemical behav

英文关键词： perfluoroalkyl compounds；analyze；particle size distribution；regional transport；gas-particle phase partitioning