Seasonal variation characteristics of hydroxyl radical pollution and its potential formation mechanism during the daytime in Lanzhou

作     者：Guoying Wang Shiming Jia Ruihong Li Shangrong Ma Xuefu Chen Zhijun Wu Gaofeng Shi Xiuli Niu Guoying Wang;Shiming Jia;Ruihong Li;Shangrong Ma;Xuefu Chen;Zhijun Wu;Gaofeng Shi;Xiuli Niu

作者机构：School of Petrochemical EngineeringLanzhou University of TechnologyLanzhou 730050China State Key Joint Laboratory of Environment Simulation and Pollution Control(Peking University)College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Gansu Food Inspection and Research InstituteLanzhou 730030China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2020年第32卷第9期

页      面：58-64页

核心收录：

学科分类：07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基　　金：supported by the National Key Research and Development Program of China(No.2016YFC0202900) the National Natural Science Foundation of China(Nos.21567015 and 21407072) the Natural Science Foundation of Gansu Province(Nos.17JR5RA109 and 18JR3RA079) Gansu Provincial Party Committee Young Creative Talents(No.Ganzutongzi121) the Sience and Technology Plan Project of Gansu Food and Drug Administration(No.2018GSFDA014) the Hongliu Science Fund for Distinguished Young Scholars(2018) the West Light Foundation of The Chinese Academy of Sciences(2019) special fund of State Key Joint Laboratory of Environment Simulation and Pollution Control(No.20K03ESPCP) Lanzhou University of Technology Hongliu First-class Discipline Construction Program(2018) 

主　　题：pollution ozone radicals 

摘      要：Hydroxyl free radicals(OH radicals) play the main role in atmospheric chemistry and their involving reactions are the dominant rate determining step in the formation of secondary fine particulate matter and in the removal of air pollutants from the *** this paper,we studied the seasonal variation characteristics of OH radicals during the daytime in Lanzhou and explored the potential formation mechanism of high concentration OH *** found that the OH radicals in four seasons was 2.7×106,2.6×106,3.1×106, and2.2×106 cm-3,*** the rainfall was concentrated in summer,the wet deposition had a significant effect on removing OH *** the four pollutants(including ozone(O3),volatile organic compounds(VOCs),nitrogen dioxide(NO2) and fine particulate matter(PM2.5)),the variation of OH radicals were closely related to ozone concentration especially in spring and *** autumn,the correlation between PM2.5 and OH radicals were the closest among the observing pollutants and its formation mechanism was different conventional regeneration *** Event 1,high concentration of ozone was the main source of OH radicals;under the high humidity condition,except for ozone,the multiple factors including VOCs,NO2 and PM2.5 interplayed and leaded to the Event 2.