The Mitigation of SOA and O3 by VOCs Emission Reduction
Ma Jing
Yan Yingying
Kong Shaofei
Wang Wuke
Tong Zhixuan
Abstract：Volatile organic compounds(VOCs)are the important precursors of ozone(O3)and secondary organic aerosols(SOA).However,current research on the mitigation of SOA and O3 by VOCs emission reduction is still insufficient.In this study,based on previous research and policies,a refined VOCs emission reduction potential covering four major emission sources was summarized.The benefits of VOCs emission reduction on SOA and ozone mitigation during the pollution events for five major air pollution regions in China were quantified using the WRF-Chem model.The results showed that the refined VOCs emission reduction strategy could reduce the SOA concentrations by 89.2％,81.2％,74.5％,72.0％,and 77.3％in the North China Plain region,Yangtze River Delta,Central China,Pearl River Delta and Sichuan Basin,respectively.The reduction potential of industrial VOCs emissions is the main contributor to the SOA mitigation in these five regions.Nevertheless,such VOCs emission reduction could only reduce ozone concentration by less than 10％,due to the nonlinear photochemical processes of ozone and its precursors.The refined VOCs emission reduction strategy could reduce the O3 concentrations by 7.55,9.05,7.29,4.31,and 3.15 μg/m3 in five areas,respectively.VOCs emission reduction of industry,transportation and residential could reduce the ozone concentration by 3.6％(3.48 μ g/m3),2.2％(2.07 μ g/m3)and 1.1％(0.98 μg/m3),respectively,on average in the five main air pollution regions.
Keywords：ozonesecondary organic aerosolsvolatile organic compounds(VOCs)pollution mitigationVOCs emission reductionWRF-Chem simulation
Publication Date：2025-09-30
Online Publishing Date：2025-10-15(First online date of this platform, not the publication date of the document)
Pages：14( 3454-3467 )