Elaborations of the influencing factors on the formation of secondary inorganic aerosols in a heavily polluted urban area of China

作     者：Shuang Wang Qiyuan Wang Ting Zhang Suixin Liu Steven Sai Hang Ho Jie Tian Hui Su Yong Zhang Luyao Wang Tingting Wu Junji Cao Shuang Wang;Qiyuan Wang;Ting Zhang;Suixin Liu;Steven Sai Hang Ho;Jie Tian;Hui Su;Yong Zhang;Luyao Wang;Tingting Wu;Junji Cao

作者机构：School of Human Settlements and Civil EngineeringXi’an Jiaotong UniversityXi’an 710049China Key Laboratory of Aerosol Chemistry and PhysicsState Key Laboratory of Loess and Quaternary GeologyInstitute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China CAS Center for Excellence in Quaternary Science and Global ChangeXi’an 710061China National Observation and Research Station of Regional Ecological Environment Change and Comprehensive Management in the Guanzhong PlainXi’an 710061China Division of Atmospheric SciencesDesert Research InstituteRenoNevada89512United States Hong Kong Premium Services and Research LaboratoryKowloonHong Kong SARChina Xi’an Institute for Innovative Earth Environment ResearchXi’an 710061China Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China 

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

年 卷 期：2024年第138卷第4期

页      面：406-417页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 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 R&D Program of China(No.2022YFF0802501) the Key Research and Development Program of Shaanxi Province(No.2018-ZDXM3-01) the Youth Innovation Promotion Association of the Chinese Academy of Sciences(No.2019402) 

主　　题：Haze episodes Secondary inorganic aerosol Secondary conversion ratio Meteorological factors 

摘      要：In this study,online water-soluble inorganic ions were detected to deduce the formation mechanism of secondary inorganic aerosol in Xianyang,China during *** dominant inorganic ions of sulfate(SO_(4)^(2-)),nitrate(NO_(3)^(-)),and ammonium(NH_(4)^(+))(the sum of those is abbreviated as SNA)accounted for 17%,21%,and 12% of PM_(2.5)mass,*** the air quality deteriorated from excellent to poor grades,the precursor gas sulfur dioxide(SO_(2))of SO_(4)^(2-)increased and then decreased with a fluctuation,while nitrogen dioxide(NO_(2))and ammonia(NH_(3)),precursors of NO_(3)^(-)and NH_(4)^(+),and SNA show increasing *** factors including boundary layer height(BLH),temperature,and wind speed also show decline trends,except relative humidity(RH).Meanwhile,the secondary conversion ratio shows a remarkable increasing trend,indicating that there was a strong secondary *** the perspective of chemical mechanisms,RH is positively correlated with sulfur oxidation ratios(SOR),nitrogen oxidation ratios(NOR),and ammonia conversion ratios,representing that the increase of humidity could promote the generation of ***,SOR and NOR were also positively related to the *** the one hand,the low wind speed and BLH led to the accumulation of *** the other hand,the increases of RH and ammonia promoted more formations of SNA and PM_(2.5).The results advance our identification of the contributors to the haze episodes and assist to establish more efficient emission controls in Xianyang,in addition to other cities with similar emission and geographical characteristics.