污染大气中有机成分对大气气溶胶表面非均相反应的影响及其作用机制

项目名称： 污染大气中有机成分对大气气溶胶表面非均相反应的影响及其作用机制

项目编号： No.21277028

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： 孔令东

作者单位： 复旦大学

项目金额： 80万元

中文摘要： 经济和城市化的迅速发展使我国许多城市大气污染呈现复合污染特征，城市灰霾日益严重，大气气溶胶污染已成为一个严重环境问题。有机成分在大气污染中起着十分重要的作用，但目前有机成分对大气气溶胶表面非均相反应的影响研究很少。本项目拟利用DRIFTS、MARGA、GC-MS、IC、TDMA、CRDS等先进技术开展污染大气中有机成分对大气气溶胶表面含硫化合物非均相反应的影响研究，考察有机成分存在下的反应活性和机理，以及这种影响所引起的颗粒吸湿性能和光学性质变化，揭示污染环境下有机物种对大气含硫化合物非均相转化过程的影响和影响机制、潜在的非均相转化途径及其在大气中的作用和产生的可能影响。开展本研究，可丰富对大气气溶胶表面非均相反应的认识，全面了解大气含硫化合物的大气化学过程，有助于更准确地估算大气硫酸盐气溶胶的辐射强迫以及更深入地理解雾、霾形成及其循环机制，并为我国城市大气污染控制和决策制定提供科学依据。

中文关键词： 大气气溶胶；非均相反应；含硫化合物；有机化合物；硝酸盐

英文摘要： Rapid economic development and urbanization in recent years have resulted in serious and complicated air pollution in many Chinese cities. Urban haze episodes have occurred more frequently. Atmospheric aerosol pollution has become a serious environmental problem. Organic components play an important role in air pollution. However, a little concern has been paid to the effects of organic component on the heterogeneous reaction of atmospheric aerosol in the polluted atmosphere up to now. Here we study the effects of organic component on heterogeneous conversion of sulfur-containing compound on atmospheric aerosol in the polluted atmosphere by using DRIFTS、MARGA、GC-MS、IC、TDMA and CRDS techniques, investigating the corresponding reactivity and reaction mechanisms in the presence of organic component, and the changes in hygroscopic and optical properties of atmospheric aerosols induced by the effects, and further revealing the influence of organic species on the heterogeneous conversion processes of atmospheric sulfur-containing compounds in polluted environment and their influence mechanisms, potential heterogeneous conversion pathways, and their possible impacts and roles in the atmosphere. This study not only helps to further understand the heterogeneous reaction of atmospheric aerosol, towards a more comprehensiv

英文关键词： atmospheric aerosol；heterogeneous reaction；sulfur-containing compound；organic compound；nitrate