Source profile characteristics of industrial VOCs in Shenzhen from the perspective of PM2.5 and O3 synergistic control
HUANG Pei-rong1, ZHU Bo1, ZHANG Yue1, HUANG Xiao-feng1, ZHU Qiao1, YU Guang-he2, YAN Min3, LIANG Yong-xian3, HE Ling-yan1
1. Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China; 2. PKU-HKUST Shenzhen-Hong Kong Institution, Shenzhen 518057, China; 3. Shenzhen Academy of Environmental Sciences, Shenzhen 518001, China
Abstract：100 VOCs components of samples were detected taken from 8 typical industries in Shenzhen so as to characterize different sources and analyze their impacts on PM2.5 and ozone pollution. The results show that, of all emissions from gas stations, alkanes accounted for 48.4%, followed by oxygenated VOCs (27.6%), ethyl acetate (14.1%), isopentane (13.0%), and n-pentane (12.0%). While oxygenated VOCs were mainly emitted from manufacture of coating, adhesives, ink, chemicals, textile printing and dyeing agents, pharmaceutical products, etc., accounting for 42.3%~97.1% of all VOCs. Furthermore, acetone was dominantly emitted from most industries and acetonitrile from some industries. For waste-to-energy industry, oxygenated VOCs and halogenated hydrocarbons contributed 33.9% and 28.3%, respectively, followed by acetaldehyde (13.4%), acetone (11.0%) and chloromethane (6.1%). For synergistically controlling PM2.5 and ozone, aromatic hydrocarbons and olefins generated from storage and transportation are the primary compounds to be mitigated; and oxygenated VOCs and aromatic hydrocarbons are the key components to be controlled in processing industry and waste disposal. Because of high SRO3 (6.0g/g) and SRSOA (1.2g/g) in coating manufacture, to most effectively mitigate PM2.5 and ozone by reducing per unit of VOCs emissions should become the priority for synergistically controlling PM2.5 and ozone in Shenzhen.
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