关中地区含氧和生物源挥发性有机物的分布及其对臭氧形成的影响

项目名称： 关中地区含氧和生物源挥发性有机物的分布及其对臭氧形成的影响

项目编号： No.41503117

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 地质学

项目作者： 戴文婷

作者单位： 中国科学院地球环境研究所

项目金额： 21万元

中文摘要： 含氧挥发性有机物（oxygenated volatile organic compounds，OVOCs)是挥发性有机物（volatile organic compounds，VOCs）中非常重要的部分，包括醇、醛和酮，直接由生物源和人为源排放，亦可通过大气中VOCs的二次氧化生成。而生物源挥发性有机物（Biogenic volatile organic compounds，BVOCs）是由植物、微生物等排放的自然源VOCs。OVOCs/BVOCs在对流层臭氧和二次污染物的生产过程中具有十分重要的作用。实际大气环境复杂多变，目前国际上对VOCs组成和转换的研究还不够充分。本研究致力于通过西安市区、秦岭背景区采样，获得关中地区OVOCs/BVOCs的分布、大气转化、迁移及终产物，通过WRF-Chem模式估算其对臭氧形成的影响，为我国制定有效地VOC控制战略以控制臭氧污染提供新的基础数据。

中文关键词： 含氧和生物源挥发性有机物；源解析；臭氧形成；HPLC；GC-MSD/FID/ECD

英文摘要： Oxygenated volatile organic compounds (OVOCs), composed of alcohols, aldehydes and ketones, account for a high contribution to volatile organic compounds (VOCs). It can be produced directly from biogenic and anthropogenic sources, or formed secondarily from the oxidation of VOCs in the atmosphere. Biogenic VOCs (BVOCs) come from the natural source of VOCs, such as plant and microbes. OVOCs / BVOCs play an important role in the production of ozone and secondary pollutants in the troposphere, and have a comparable effect on the atmospheric oxidizing capacity to that of non-methane hydrocarbons (NMHCs). The atmospheric conditions in in-situ environment are complicated, and the exact composition and transformation mechanisms of VOCs remain unclear at present. Guanzhong Basin is experiencing an increase of ozone and regional photochemical smog issue, which significantly reduces visibility and adversely affects human health, as an ideal natural region to conduct the related research. We propose a three year systematic study to attain better understanding on the sources, atmospheric transformation, transportation, and fate of OVOCs and BVOCs in Guanzhong Basin. The impacts of OVOCs and BVOCs on ozone formation will be evaluated through WRF-Chem modeling. The study can achieve sufficient data for source apportionment and serve further insight into the characteristics of OVOCs and BVOCs in Guanzhong Basin, which are valuable in establishing effective VOC control strategies to control ozone pollution.

英文关键词： OVOCs/BVOCs;Source Apportionment;Ozone Formation;HPLC;GC-MSD/FID/ECD