Ambient volatile organic compounds at a receptor site in the Pearl River Delta region:Variations,source apportionment and effects on ozone formation  

作　　者：Yao Meng Junwei Song Lewei Zeng Yingyi Zhang Yan Zhao Xufei Liu Hai Guo Liuju Zhong Yubo Ou Yan Zhou Tao Zhang Dingli Yue Senchao Lai 

机构地区：[1]The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters,Ministry of Education,and Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control,School of Environment and Energy,South China University of Technology,Guangzhou 510006,China [2]Institute of Meteorology and Climate Research,Karlsruhe Institute of Technology,Hermann-von-Helmholtz-Platz 1,Eggenstein-Leopoldshafen 76344,Germany [3]Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University,Hong Kong,China [4]Guangdong Environmental Monitoring Center,State Environmental Protection Key Laboratory of Regional Air Quality Monitoring,Guangzhou 510308,China [5]Guangdong Polytechnic of Environmental Protection Engineering,Foshan 528216,China

出　　处：《Journal of Environmental Sciences》2022年第1期104-117,共14页环境科学学报（英文版）

基　　金：supported by the National Key R&D Program of China(Nos.2017YFC0212802 and 2017YFC0212004);the support of MOST project(No.2017YFC0212001)for the collaboration。

摘　　要：We present the continuously measurements of volatile organic compounds(VOCs)at a receptor site(Wan Qing Sha,WQS)in the Pearl River Delta(PRD)region from September to November of 2017.The average mixing ratios of total VOCs(TVOCs)was 36.3±27.9 ppbv with the dominant contribution from alkanes(55.5%),followed by aromatics(33.3%).The diurnal variation of TVOCs showed a strong photochemical consumption during daytime,resulting in the formation of ozone(O_(3)).Five VOC sources were resolved by the positive matrix factorization(PMF)model,including solvent usage(28.6%),liquid petroleum gas(LPG)usage(24.4%),vehicle exhaust(21.0%),industrial emissions(13.2%)and gasoline evaporation(12.9%).The regional transport air masses from the upwind cities of south China can result in the elevated concentrations of TVOCs.Low ratios of TVOCs/NO_(x)(1.53±0.88)suggested that the O_(3) formation regime at WQS site was VOC-limited,which also confirmed by a photochemical box model with the master chemical mechanism(PBM-MCM).Furthermore,the observation on high-O_(3) episode days revealed that frequent O_(3) outbreaks at WQS were mainly caused by the regional transport of anthropogenic VOCs especially for aromatics and the subsequent photochemical reactions.This study provides valuable information for policymakers to propose the effective control strategies on photochemical pollution in a regional perspective.

关 键 词：Volatile organic compounds(VOCs) Pearl River Delta(PRD)region Source apportionment Ozone(O_(3)) Regional transport 

分 类 号：X515[环境科学与工程—环境工程]