四川省基于第二次污染源普查数据的人为源大气污染源排放清单及特征

本研究根据自下而上和自上而下相结合的方法收集四川省人为源活动水平数据,其中工业源活动水平来自四川省第二次污染源普查数据,涵盖11 020台锅炉信息、 60 078家工业企业信息,成都市收集了19152家工业企业数据,占四川省企业总数的32%.各污染源选取合理的排放因子并结合GIS技术,构建了该地区2017年9 km×9 km人为源大气污染物排放清单.结果表明, 2017年四川省SO₂、 NO_x、 CO、 PM₁₀、 PM_2.5、 BC、 OC、 VOCs和NH₃排放总量分别为308.6×10³、 725.7×10³、 3 131.2×10³、 927.6×10³、 422.4×10³、 30.2×10³、 72.0×10³、 600.9×10³和887.1×10³t.固定燃烧源和工艺...

Emission Inventory and Characteristics of Anthropogenic Air Pollution Sources Based on Second Pollution Source Census Data in Sichuan Province

In this research, the activity data of Sichuan Province were collected using bottom-up and top-down methods. According to the second survey of pollution sources, the activity data of industrial source includes information of 11020 boilers and 60078 industrial enterprises. Data of 19152 industrial enterprises were collected in Chengdu, accounting for 32% of the total number of enterprises in Sichuan Province. The anthropogenic air pollutant emission inventory of 9 km×9 km was developed for Sichuan Province in 2017 with the use of appropriate emission estimation methods. The results showed that the total emission of SO₂,NO_x,CO,PM₁₀,PM_2.5,BC,OC,VOCs, and NH₃ in Sichuan were 308.6×10³, 725.7×10³, 3131.2×10³, 927.6×10³, 422.4×10³, 30.2×10³, 72.0×10³, 600.9×10³, and 887.1×10³ t. The fixed combustion source and process source mainly contributed as sources of SO₂. The main source of CO was the process source and mobile source. Further, the dust source and process source were the main sources of PM₁₀ and PM_2.5, and the dust source was the largest source of BC and OC contributions. The emission sources of the VOCs were primarily the process sources, mobile sources and solvent use sources. The NH₃ emissions were mainly from livestock and poultry breeding and nitrogen fertilizer applications. The spatial distribution results showed that the pollutants were mainly concentrated in the densely populated Sichuan basin and Panzhihua region, where industry and agriculture were relatively developed. The high value points are concentrated along the Deyang-Chengdu-Meishan-Leshan line in Chengdu Plain. The emission inventory established in this study still has certain uncertainties, and the accuracy of activity level data acquisition should be further enhanced. Moreover, pollutant emission factor testing should be carried out for typical pollution sources, and grid emission inventory should be improved to provide scientific support for the prevention and control of air pollution in Sichuan Province in the future.