Effects of NO_(2) and SO_(2) on the secondary organic aerosol formation fromβ-pinene photooxidation  

作　　者：Xiangyu Zang Zhaoyan Zhang Yingqi Zhao Gang Li Hua Xie Weiqing Zhang Guorong Wu Xueming Yang Ling Jiang 

机构地区：[1]Zhang Dayu School of Chemistry,Dalian University of Technology,Dalian 116024,China [2]State Key Laboratory of Molecular Reaction Dynamics,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Department of Chemistry,School of Science,Southern University of Science and Technology,Shenzhen 518055,China

出　　处：《Journal of Environmental Sciences》2024年第2期151-160,共10页环境科学学报（英文版）

基　　金：National Natural Science Foundation of China (Nos.22125303,92061203,and 22288201);the National Key Research and Development Program of China (No.2021YFA1400501);Innovation Program for Quantum Science and Technology (No.2021ZD0303304);Dalian Institute of Chemical Physics (No.DICP DCLS201702);Chinese Academy of Sciences (No.GJJSTD20220001);K.C.Wong Education Foundation (No.GJTD-2018-06)。

摘　　要：Elucidating the effects of anthropogenic pollutants on the photooxidation of biogenic volatile organic compounds is crucial to understanding the fundamental mechanisms of secondary organic aerosol(SOA)formation.Here,the impacts of NO_(2)and SO_(2)on SOA formation from the photooxidation of a representative monoterpene,β-pinene,were investigated by a number of laboratory studies.The results indicated NO_(2)enhanced the SOA mass concentrations and particle number concentrations under both low and highβ-pinene conditions.This could be rationalized that the increased O_(3)concentrations upon the NO_(x)photolysis was helpful for the generation of more amounts of O_(3)-oxidized products,which accelerated the SOA nucleation and growth.Combing with NO_(2),the promotion of the SOA yield by SO_(2)was mainly reflected in the increase of mass concentration,which might be due to the elimination of the newly formed particles by the initially formed particles.The observed low oxidation degree of SOA might be attributed to the fast growth of SOA,resulting in the uptake of less oxygenated gas-phase species onto the particle phase.The present findings have important implications for SOA formation affected by anthropogenic–biogenic interactions in the ambient atmosphere.

关 键 词：Secondary organic aerosol Volatile organic compound Anthropogenic pollutant BETA-PINENE PHOTOOXIDATION 

分 类 号：X513[环境科学与工程—环境工程]