State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing 100084, China.
Environ Sci Technol. 2023 Oct 31;57(43):16435-16445. doi: 10.1021/acs.est.3c04106. Epub 2023 Oct 19.
Traditional global emission inventories classify primary organic emissions into nonvolatile organic carbon and volatile organic compounds (VOCs), excluding intermediate-volatility and semivolatile organic compounds (IVOCs and SVOCs, respectively), which are important precursors of secondary organic aerosols. This study establishes the first global anthropogenic full-volatility organic emission inventory with chemically speciated or volatility-binned emission factors. The emissions of extremely low/low-volatility organic compounds (xLVOCs), SVOCs, IVOCs, and VOCs in 2015 were 13.2, 10.1, 23.3, and 120.5 Mt, respectively. The full-volatility framework fills a gap of 18.5 Mt I/S/xLVOCs compared with the traditional framework. Volatile chemical products (VCPs), domestic combustion, and on-road transportation sources were dominant contributors to full-volatility emissions, accounting for 30, 30, and 12%, respectively. The VCP and on-road transportation sectors were the main contributors to IVOCs and VOCs. The key emitting regions included Africa, India, Southeast Asia, China, Europe, and the United States, among which China, Europe, and the United States emitted higher proportions of IVOCs and VOCs owing to the use of cleaner fuel in domestic combustion and more intense emissions from VCPs and on-road transportation activities. The findings contribute to a better understanding of the impact of organic emissions on global air pollution and climate change.
传统的全球排放清单将一次有机排放分为非挥发性有机碳和挥发性有机化合物（VOCs），不包括中等挥发性和半挥发性有机化合物（分别为 IVOCs 和 SVOCs），它们是二次有机气溶胶的重要前体。本研究建立了第一个具有化学特征或挥发性分类排放因子的全球人为全挥发性有机排放清单。2015 年，极低/低挥发性有机化合物（xLVOCs）、SVOCs、IVOCs 和 VOCs 的排放量分别为 132 万吨、101 万吨、233 万吨和 1205 万吨。全挥发性框架与传统框架相比，填补了 185 万吨 I/S/xLVOCs 的空白。挥发性化学产品（VCPs）、国内燃烧和道路运输源是全挥发性排放的主要贡献者，分别占 30%、30%和 12%。VCP 和道路运输部门是 IVOCs 和 VOCs 的主要排放源。主要排放地区包括非洲、印度、东南亚、中国、欧洲和美国，其中中国、欧洲和美国由于国内燃烧中使用了更清洁的燃料以及 VCP 和道路运输活动的排放更为强烈，因此排放了更高比例的 IVOCs 和 VOCs。这些发现有助于更好地了解有机排放对全球空气污染和气候变化的影响。
