我国经济发达的城市地区大气中HFRs污染来源复杂。然而很少研究探索大气中HFRs的复合来源污染及其在城市群的迁移。项目以珠三角为研究地区，开展城市大气HFR污染研究，主要包括：1）识别城市大气中HFRs的主要来源，对排放源的贡献进行定量分配，并通过模型估计HFR大气排放总量；同时，还研究电子垃圾地区大气中颗粒物HFRs的释放途径和机制；2）通过分析大气颗粒物的化学组成（无机元素、离子物种、碳质组分等），认识大气颗粒物的组成和来源与HFRs之间的联系，认识城市气溶胶颗粒物性质对HFRs在气-粒间分配的影响；3）研究HFRs在珠三角不同城市间的传输以及过程中的HFRs组成、赋存状态、手性特征变化和降解等，并评价珠三角城市群的大气HFRs复合污染。项目研究对认识我国城市大气HFRs污染、传输以及行为归趋都有重要的意义，对我国HFRs的减排、履行国际公约和减少人群暴露风险等也有指导意义。

The sources of halogenated flame retardant (HFR) are very complex in the atmosphere in Chinese cities with rapid economic development. Despite previous efforts, few studies have been conducted to elucidate the multi-sources of HFRs in the urban atmosphere. The objectives of this program are i) to identify and apportion the major emission sources of HFRs in the urban atmosphere, to estimate the total emission inventories of the major sources using current models, and to investigate the emission mechanisms (pathway) of particle-bound HFRs in the e-waste area in China; ii) to establish the correlations between the chemical constituent (e.g., trace elements, ion species, and OC/EC) and HFRs in particulate matter and to understand the influence of properties of urban aerosol on the gas/particle partitioning of HFRs; iii) to investigate the inter-city transport of HFRs in city cluster and the variations in composition, gas/particle partitioning, and chiral signature during the movement. This study will provide significant implications for reducing the emission source and human exposure in the urban areas in China and understanding the fate of HFRs in the atmosphere. The results of this study will also have instructional significance of emission control and implementing international conventions for Chinese government.