PM2.5中有机硫酸酯类物质的定量分析方法及其应用

项目名称： PM2.5中有机硫酸酯类物质的定量分析方法及其应用

项目编号： No.21307022

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 环境科学、安全科学

项目作者： 曹罡

作者单位： 哈尔滨工业大学

项目金额： 23万元

中文摘要： 由于受到当前有机气溶胶化学组分分析技术的限制，通过识别和定量各种单一的硫酸酯类物质来评价其对大气中有机气溶胶的贡献具有很大的困难。本项目提出采用间接分光光度法对气溶胶中总的有机硫酸酯类物质进行定量，并用OCtotal/OCS-related比值法来评价气溶胶中总的硫酸酯类物质对有机气溶胶的贡献。具体研究内容包括：建立和优化间接光度法检测颗粒物中有机硫酸酯类物质的总硫酸根含量；研究有机硫酸酯类物质中的含硫量与含碳量的相关关系；研究实际大气环境中气溶胶中有机硫酸酯类物质对PM2.5的贡献。本项目采用大气烟雾舱实验与实地监测相结合的方式，旨在通过深入研究SO2与有机气溶胶共存时的污染特征，从大气化学的角度揭示SO2浓度与有机气溶胶浓度的内在关系，推进我们对二次有机气溶胶形成机制的进一步认识。

中文关键词： PM2.5；有机硫酸酯；SO2；大气气溶胶；

英文摘要： Due to limitations of current available analytical technologies for chemical compositions of aerosols, it is difficult to evaluate the contributions of organosulfate to atmospheric organic aerosols by identification and quantification of all kinds of a single organosulfate. This project proposes an indirect method using a spectrometer to quantify the bulk organosulfate and employs a ratio of the content of total organic carbon in aerosols to the content of organic carbon in organosulfates to study the contributions of organosulfate to organic aerosols. The proposal includes establishment and improvement of an indirect spectrometric method to determine the sulfate content in organosulfates in aerosols; studies on the relationship between content of S and content of C in organosulfates; studies on the contribution of organosulfate to PM2.5 in the real atmosphere. This project aims at conducting a deep study of pollution characteristics of coexistence of SO2 and organic aerosols by chamber experiments and field investigations. It will shed light on the inner relationship between concentrations of SO2 and concentrations of organic aerosols. It will also enhance our understanding of formation mechanisms of secondary organic aerosols.

英文关键词： PM2.5；organosulfates；SO2；atmospheric aerosols；