摘要
生物源与人为源有机气体氧化形成的二次有机气溶胶(SOA)对气候变化和人类健康具有重要影响。SOA的产生与其前体物研究已取得了一些进展,但由于有机气体之间存在复合相互作用以及SOA形成机制复杂,目前对不同有机气体混合体系中SOA的形成认知还比较匮乏。因此,深入了解有机气体多源、复杂的相互作用,摸清有机气体的大气氧化机制、SOA的形成及影响等对深入理解真实大气有机气体化学演变具有指导意义。本文旨在了解复合体系有机气体氧化生成SOA的相关研究进展。一方面总结了复合体系有机气体产生SOA质量浓度、产率、成分、挥发性、光学性质等的变化,侧重于实验室复合体系有机气体氧化对SOA形成的多重影响以及SOA组成元素、分子构成的变化特征,并总结了目前实验室基于模型对复合体系SOA生成的模拟研究和拟合情况;另一方面探究了环境因素,如相对湿度(RH)、温度(T)以及无机气体,如氮氧化物(NO x)、二氧化硫(SO 2)、氨气(NH 3)等对复合体系有机气体形成SOA的影响。
Biogenic and anthropogenic organic gases undergo oxidation in the atmosphere,resulting in the formation of secondary organic aerosols(SOA).SOA plays a crucial role in climate change and human health.While considerable advancements have been made in understanding SOA production and its precursors,the intricate interactions among organic gases and the complex mechanisms governing SOA formation still presents challenges.Currently,knowledge gaps persist regarding SOA formation arising from the oxidation of different organic gases present within complex systems.This review aims to provide insights into the evolving research landscape concerning the oxidation of organic gases in complex systems leading to SOA formation.The review encompasses two primary aspects.Firstly,it summarizes the variations in mass concentration,yield,composition,volatility,and optical properties of SOA resulting from the oxidation of organic gases within complex systems.This section explores the different effects of organic gas oxidation within complex systems on SOA formation.Additionally,it delves into the evolving constituent elements and molecular composition of SOA.Furthermore,this review collates current laboratory-based simulation studies on generating SOA from composite systems and evaluating model accuracy.Secondly,it investigates the effects of environmental factors,including relative humidity(RH),temperature(T),and inorganic gases such as nitrogen oxides(NO x),sulfur dioxide(SO 2),and ammonia(NH 3),on the interaction with organic gases within complex systems,ultimately leading to SOA formation.This exploration provides valuable insights into the interplay of environmental variables in shaping SOA characteristics.Therefore,this review contributes to a deeper understanding of the chemical evolution of organic gases in the real atmosphere.It highlights the necessity of studying the multi-source and complex interactions of organic gases and mapping the intricate atmospheric oxidation mechanisms,leading to SOA formation,and outlines avenu
作者
陈晓文
李坤
李建龙
杜林
CHEN Xiaowen;LI Kun;LI Jianlong;DU Lin(Environment Research Institute,Shandong University,Qingdao 266237,China)
出处
《大气科学学报》
CSCD
北大核心
2023年第5期641-654,共14页
Transactions of Atmospheric Sciences
基金
国家自然科学基金资助项目(22076099)。
关键词
有机气体
大气氧化
二次有机气溶胶
形成机制
影响因素
organic gases
atmospheric oxidation
secondary organic aerosols
formation mechanism
influencing factors
