江苏省2019年S/IVOCs排放清单及分布特征

通过收集各类S/IVOCs排放源的活动水平数据,选取合适的排放因子和估算方法,建立了2019年江苏省半/中等挥发性有机物(S/IVOCs)排放清单,分析了江苏省各地市以及各排放源的排放特征.结果表明,2019年江苏省排放S/IVOCs约637.31 Gg,其中工业源排放最多,占比达到63.42%,其次为道路移动源(22.23%),非道路移动源占比最少(0.06%).江苏省13地市中,苏州市S/IVOCs排放量最高(161.86 Gg),占江苏省S/IVOCs排放总量的25.40%;单位面积排放强度苏州市最高(18.70 t·km^-2),而单位GDP排放强度连云港市最高(22.45 t·亿元^-1).江苏南部S/IVOCs的排放量较中部和北部地区高,各地市S/IVOCs总排放量、单位面积排放强度和单位GDP排放强度相差均较大.全省S/IVOCs排放量的不确定范围在-88.46%～224.38%,其中生物质燃烧源的不确定范围最大,为-96.40%～277.17%.

Establishment and Spatial Distribution of S/IVOCs Emission Inventory in Jiangsu Province in 2019

The semi-/intermediate volatile organic compound (S/IVOCs) emissions inventory of Jiangsu province was established in 2019 using the activity data of various S/IVOCs emission sources, emission factors, and an estimation method. S/IVOCs emissions for each source and city in Jiangsu province were analyzed. The total amount of S/IVOCs emissions in Jiangsu province in 2019 was 637.31 Gg. Industrial sources were the major source of total S/IVOCs emissions accounting for 63.42% (404.20 Gg), followed by residential on-road mobile sources (22.23%), and off-road mobile sources accounted for the least (0.06%). Suzhou had the highest S/IVOCs emissions in 2019, accounting for 25.40% (161.86 Gg) of the total S/IVOCs emissions in Jiangsu province. The S/IVOCs emission intensity per unit area in Suzhou was the highest, reaching 18.70 t·km^-2, and the emission intensity per unit GDP was the highest in Lianyungang (22.45 t·100 million yuan^-1). The spatial distribution map revealed that S/IVOCs emissions in southern Jiangsu were relatively higher. The difference in the total emission of S/IVOCs, emission intensity per unit area, and emission intensity per unit of GDP were quite different among cities. The uncertainty range of S/IVOCs emissions was -88.46%-224.38% in Jiangsu province in 2019. The uncertainty range of biomass burning sources was the largest (-96.40%-277.17%).