One-year observation of the mixing states of oxygenated organics-containing single particles in Guangzhou,China

扫码查看

原文链接

万方数据
维普

外文摘要：Oxygenated organic molecules(OOMs)play an important role in the formation of secondary organic aerosols(SOAs),but the mixing states of OOMs are still unclear.This 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 2022.Generally,the particle counts of OOM particles and the mass concentration of secondary organic carbon(SOC)exhibited similar temporal trends throughout the entire year.The OOM particles were consistently enriched in secondary ions,including 16O,26CN-,46NO2-,62NO3-,and 97HSO4-.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 organics.In addition,further classification results indicated that the OOM particles were more aged in October than August,even though the SOC ratios were higher in August Furthermore,the distribution of hydrocarbon fragments exhibited a notable decrease from January to October,emphasizing the more aged state of the organics in October.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 organics.Overall,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.

外文关键词：

Oxygenated organicsSingle particlesMixing stateSecondary formationPhotochemistry

作者：

Liyuan Mao、Suxia Yang、Xiaoya Cheng、Sulin Liu、Duanying Chen、Zhen Zhou、Mei Li、Chenglei Pei、Chunlei Cheng

展开 >

作者单位：

Institute of Mass Spectrometry and Atmospheric Environment,Guangdong Provincial Engineering Research Center for the On-line Source Apportionment System of Air Pollution,Jinan University,Guangzhou 510632,China

Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality,Guangzhou 510632,China

Guangzhou Research Institute of Environment Protection Co.,Ltd.,Guangzhou 510620,China

Guangzhou Ecological and Environmental Monitoring Center of Guangdong Province,Guangzhou 510030,China

State Key Laboratory of Marine Resource Utilization in South China Sea,Hainan University,Haikou 570228,China

State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Env

展开 >

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Guangdong Province(China)State Key Laboratory of Marine Resource Utilization in the South China Sea,Hainan University(China)State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,CAS

项目编号：

41827804418050932021A1515011206MRUKF2023009SKLLQG2218

出版年：

2024

DOI：

10.1007/s11783-024-1824-3

环境科学与工程前沿

高等教育出版社

环境科学与工程前沿

影响因子：0.545

ISSN：2095-2201

年,卷(期)：2024.18(5)