title: Speciated OVOC and VOC emission inventories and their implications for reactivity-based ozone control strategy in the Pearl River Delta region, China.
abstract: The increasing ground-ozone (O3) levels, accompanied by decreasing SO2, NO2, PM10 and PM2.5 concentrations benefited from air pollution control measures implemented in recent years, initiated a serious challenge to control Volatile Organic Compound (VOC) emissions in the Pearl River Delta (PRD) region, China. Speciated VOC emission inventory is fundamental for estimating Ozone Formation Potentials (OFPs) to identify key reactive VOC species and sources in order to formulate efficient O3 control strategies. With the use of the latest bulk VOC emission inventory and local source profiles, this study developed the PRD regional speciated Oxygenated Volatile Organic Compound (OVOC) and VOC emission inventories to identify the key emission-based and OFP-based VOC sources and species. Results showed that: (1) Methyl alcohol, acetone and ethyl acetate were the major constituents in the OVOC emissions from industrial solvents, household solvents, architectural paints and biogenic sources; (2) from the emission-based perspective, aromatics, alkanes, OVOCs and alkenes made up 39.2%, 28.2%, 15.9% and 10.9% of anthropogenic VOCs; (3) from the OFP-based perspective, aromatics and alkenes become predominant with contributions of 59.4% and 25.8% respectively; (4) ethene, m/p-xylene, toluene, 1,2,4-trimethyl benzene and other 24 high OFP-contributing species were the key reactive species that contributed to 52% of anthropogenic emissions and up to 80% of OFPs; and (5) industrial solvents, industrial process, gasoline vehicles and motorcycles were major emission sources of these key reactive species. Policy implications for O3 control strategy were discussed. The OFP cap was proposed to regulate VOC control policies in the PRD region due to its flexibility in reducing the overall OFP of VOC emission sources in practice.
authors.affiliation: Institute of Space and Earth Information Science, The Chinese University of Hong Kong, Hong Kong, China.
authors.forename: Jiamin
authors.initials: J
authors.lastname: Ou
authors.affiliation: College of Environment and Energy, South China University of Technology, University Town, Guangzhou 510006, PR China. Electronic address: zheng.junyu@gmail.com.
authors.forename: Junyu
authors.initials: J
authors.lastname: Zheng
authors.affiliation: Institute of Space and Earth Information Science, The Chinese University of Hong Kong, Hong Kong, China.
authors.forename: Rongrong
authors.initials: R
authors.lastname: Li
authors.affiliation: College of Environment and Energy, South China University of Technology, University Town, Guangzhou 510006, PR China.
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Huang
authors.affiliation: College of Environment and Energy, South China University of Technology, University Town, Guangzhou 510006, PR China.
authors.forename: Zhuangmin
authors.initials: Z
authors.lastname: Zhong
authors.affiliation: Guangdong Provincial Environmental Monitoring Center, Guangzhou 510045, PR China.
authors.forename: Liuju
authors.initials: L
authors.lastname: Zhong
authors.affiliation: Institute of Space and Earth Information Science, The Chinese University of Hong Kong, Hong Kong, China; Department of Geography and Resource Management, The Chinese University of Hong Kong, Hong Kong, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Lin
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000397:Air Pollution / Q000331:legislation & jurisprudence / Q000517:prevention & control*; D002681:China; D004784:Environmental Monitoring; D058735:Environmental Policy; D010126:Ozone / Q000032:analysis*; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D055549:Volatile Organic Compounds; D010126:Ozone
keywords: OFP; OVOC; Reactivity-based control; Speciated emission inventory; VOC