A comparative study on the formation of nitrogen-containing organic compounds in cloud droplets and aerosol particles  

作　　者：Guohua Zhang TaoWang Qinhao Lin Kun Liu Wei Sun Duohong Chen Lei Li Xinming Wang Xinhui Bi 

机构地区：[1]State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences(CAS),Guangzhou 510640,China [2]Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control,Guangzhou Institute of Geochemistry,CAS,Guangzhou 510640,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]School of Environmental Science and Engineering,Institute of Environmental Health and Pollution Control,Guangdong University of Technology,Guangzhou 510006,China [5]State Environmental Protection Key Laboratory of Regional Air Quality Monitoring,Guangdong Environmental Monitoring Center,Guangzhou 510308,China [6]Institute of Mass Spectrometer and Atmospheric Environment,Jinan University,Guangzhou 510632,China

出　　处：《Journal of Environmental Sciences》2025年第3期456-464,共9页环境科学学报(英文版)

基　　金：supported by the National Key Research and Development Program of China(No.2022YFC3701103);the National Natural Science Foundation of China(No.42222705);the Youth Innovation Promotion Association CAS(No.2021354);Guangdong Foundation for Program of Science and Technology Research(No.2023B1212060049).

摘　　要：Nitrogen-containing organic compounds(NOCs)may potentially contribute to aqueous secondary organic aerosols,yet the different formation of NOCs in aerosol particles and cloud droplets remains unclear.With the in-situ measurements performed at a mountain site(1690 m a.s.l.)in southern China,we investigated the formation of NOCs in the cloud droplets and the cloud-free particles,based on their mixing state information of NOCscontaining particles by single particle mass spectrometry.The relative abundance of NOCs in the cloud-free particles was significantly higher than those in cloud residual(cloud RES)particles.NOCs were highly correlated with carbonyl compounds(including glyoxalate and methylglyoxal)in the cloud-free particles,however,limited correlation was observed for cloud RES particles.Analysis of their mixing state and temporal variations highlights that NOCs was mainly formed from the carbonyl compounds and ammonium in the cloud-free particles,rather than in the cloud RES particles.The results support that the formation of NOCs from carbonyl compounds is facilitated in concentrated solutions in wet aerosols,rather than cloud droplets.In addition,we have identified the transport of biomass burning particles that facilitate the formation of NOCs,and that the observed NOCs is most likely contributed to the light absorption.These findings have implications for the evaluation of NOCs formation and their contribution to light absorption.

关 键 词：Nitrogen-containing organic COMPOUNDS Individual particles CLOUD Carbonyl compounds Mixing state 

分 类 号：X513[环境科学与工程—环境工程]