One-year observation of the mixing states of oxygenated organics-containing single particles in Guangzhou,China
作者机构：Institute of Mass Spectrometry and Atmospheric EnvironmentGuangdong Provincial Engineering Research Center for the On-line Source Apportionment System of Air PollutionJinan UniversityGuangzhou510632China Guangdong-Hongkong-Macao Joint Laboratory of Collaborative Innovation for Environmental QualityGuangzhou510632China Guangzhou Research Institute of Environment Protection Co.Ltd.Guangzhou510620China Guangzhou Ecological and Environmental Monitoring Center of Guangdong ProvinceGuangzhou510030China State Key Laboratory of Marine Resource Utilization in South China SeaHainan UniversityHaikou570228China State Key Laboratory of Loess and Quaternary GeologyInstitute of Earth EnvironmentChinese Academy SciencesXi’an710061China
出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)
年 卷 期：2024年第18卷第5期
页 面：155-169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] 0703[理学-化学]
基 金：supported by the National Natural Science Foundation of China(Grant Nos.41827804 and 41805093) the Natural Science Foundation of Guangdong Province(China)(No.2021A1515011206) the State Key Laboratory of Marine Resource Utilization in the South China Sea,Hainan University(China)(No.MRUKF2023009) the State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,CAS(No.SKLLQG2218)
主 题：Oxygenated organics Single particles Mixing state Secondary formation Photochemistry
摘 要：Oxygenated organic molecules(OOMs)play an important role in the formation of secondary organic aerosols(SOAs),but the mixing states of OOMs are still *** study investigates the mixing states of OOM-containing single particles from the measurements taken using a single particle aerosol mass spectrometer in Guangzhou,China in ***,the particle counts of OOM particles and the mass concentration of secondary organic carbon(SOC)exhibited similar temporal trends throughout the entire *** OOM particles were consistently enriched in secondary ions,including ^(16)O^(−),^(26)CN^(−),^(46)NO_(2)^(−),^(62)NO_(3)^(−),and ^(97)HSO_(4)^(−).In contrast,the number fractions and diurnal patterns of OOM particles among the total detected particles showed similar distributions in August and October;however,the SOC ratios in fine particulate matter were quite different,suggesting that there were different mixing states of single-particle oxygenated *** addition,further classification results indicated that the OOM particles were more aged in October than August,even though the SOC ratios were higher in ***,the distribution of hydrocarbon fragments exhibited a notable decrease from January to October,emphasizing the more aged state of the organics in *** addition,the sharp increase in elemental carbon(EC)-OOM particles in the afternoon in October suggests the potential role of EC in the aging process of ***,in contrast to the bulk analysis of SOC mass concentration,the mixing states of the OOM particles provide insights into the formation process of SOAs in field studies.
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