不同粒径大气颗粒物中新型持久性有机污染物的分布特征及迁移规律研究

Heavy air pollution by particulate matter and persistent organic pollutants may be due to flourishing industry, growing population and automobile transportation, which might bring potential risk to the environment and human health. In this study, Beijing-Tianjin-Hebei Region will be investigated as typical area. Emerging POPs (mainly including PBDD/Fs, PCNs) and legacy POPs (mainly including PBDEs, PCDD/Fs) in different particle sizes in air surrounding the region will be collected and analyzed. Particle size distributions of these pollutants will be analyzed to identify the major diameter where they mainly exist. The mechanisms controlling particle size distribution will be revealed.The sites with large emission sources of the target pollutants will be selected and studied. Based on the obtained data, atmospheric dispersion models will be examined and applied to analyze the transport of target pollutants in the atmosphere. The results will provide scientific data and technical means for the environmental risk estimation and pollution control of target pollutants in atmosphere. Health-related exposures of target pollutants will be estimated by their concentrations in different size particle matter, providing data support for reducing the risk of human exposure to these pollutants.

繁荣的工业，密集的人口，发达的交通会带来比较严重的大气颗粒物污染与持久性有机污染物（POPs）污染，给环境和居民健康带来潜在的危害。本研究将以京津冀为典型区域，主要针对该地区不同粒径大气颗粒物中的以溴代二恶英（PBDD/Fs）和多氯萘（PCNs）等为主的新型持久性有机污染物和以多溴代联苯醚（PBDEs）与氯代二恶英（PCDD/Fs）等为主的传统POPs进行采集和测定，分析该地区大气中这些目标污染物的粒径分布，识别其存在的主要粒径范围，揭示控制粒径分布的机制。选取排放源附近地区进行研究，基于获得的数据，结合大气扩散模型，对大气颗粒物中目标污染物的迁移规律进行研究，研究结果将为该地区大气中目标污染物的环境风险评价、污染控制与治理提供数据支持和技术手段。最后评估居民对不同粒径颗粒物中目标污染物的呼吸暴露风险，为降低这些污染物的人体暴露风险提供数据支持。

本研究建立大气不同粒径颗粒物中以PBDD/Fs等为主的新型POPs及以PCDD/Fs为主的传统POPs的同步采集方法，建立和完善目标物的前处理及其分析检测方法。并且研究了大气颗粒物中目标污染物（PCDD/Fs，PBDD/Fs，Cl/Br-PAHs等）的粒径分布特征、控制粒径分布机制的研究及来源解析，考察不同时空各粒径大气颗粒物中的目标污染物含量水平与分布特征。并且评估了人对不同粒径颗粒物中目标污染物呼吸暴露风险。