长株潭城市群人为源VOCs排放清单及其对环境的影响

Inventory and Environmental Impact of VOCs Emission from Anthropogenic Source in Chang-Zhu-Tan Region

基于长株潭城市群环境统计数据和排放系数,建立了2014年长株潭城市群人为源VOCs排放清单,并根据空间特征数据进行了3 km×3 km的空间网格分配,同时还估算了各类人为源排放VOCs的臭氧生成潜势与二次有机气溶胶生成潜势.结果表明,长株潭地区人为源VOCs排放总量为113.49 kt,其中工艺过程源、溶剂使用源和移动源为最主要的排放源,排放量分别为35.88、28.72、22.13 kt,工艺过程源中75.34%的VOCs排放量来自建材生产,溶剂使用源中建筑涂料和汽车喷涂为主要排放源;各区县中醴陵市的VOCs排放量最高为16.58 kt;长株潭地区总臭氧生成潜势为375.33 kt,溶剂使用源贡献最大为27.28%,生物质燃烧源的臭氧生成能力最强;二次有机气溶胶生成潜势中,溶剂使用源贡献比例最大为35.35%,其二次有机气溶胶生成能力也强于其它源类;空间分布特征显示城区的网格排放量较大.

Based on environmental statistical data and emission factor, an anthropogenic volatile organic compounds （ⅤOCs） emission inventory was established for the Chang-Zhu-Tan region, and a grid with spatial resolution of 3 km × 3 km was built according to the spatial feature data. Ozone formation potential （ OFP） and secondary organic aerosol （ SOA） formation potential of anthropogenic sources were also estimated. The results showed that the total anthropogenic ⅤOCs emission was about 113. 49 kt in Chang-Zhu-Tan region and the main sources were industrial processes, solvent utilization and vehicles with the ⅤOCs emission of 35. 88 kt, 28. 72 kt and 22. 13 kt, respectively. Paving pitch and architecture wall painting accounted for the majority of the solvent utilization and the building materials industry accounted for 75. 34% of ⅤOCs emission from the industrial processes. Liling was the largest contributor compared to the other cities in Chang-Zhu-Tan region, where the ⅤOCs emission from these anthropogenic sources in 2014 was 16. 58 kt. The total OFP of these sources was 375. 33 kt, in which solvent utilization contributed 27. 28% and the O3 generative capacity of biomass burning was the largest. Solvent utilization contributed 35. 35% to the total SOA formation potentials and its SOA generative capacity was also the largest. The spatial distribution characteristics revealed that the ⅤOCs emission mostly originated from urban area.