Uncovering the dominant contribution of intermediate volatility compounds in secondary organic aerosol formation from biomass-burning emissions

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外文摘要：Organic vapors from biomass burning are a major source of secondary organic aerosols(SOAs).Previous smog chamber studies found that the SOA contributors in biomass-burning emissions are mainly volatile organic compounds(VOCs).While intermediate volatility organic compounds(IVOCs)are efficient SOA precursors and contribute a considerable fraction of biomass-burning emissions,their contribution to SOA formation has not been directly observed.Here,by deploying a newly-developed oxidation flow reactor to study SOA formation from wood burning,we find that IVOCs can contribute～70％of the formed SOA,i.e.＞2 times more than VOCs.This previously missing SOA fraction is interpreted to be due to the high wall losses of semi-volatile oxidation products of IVOCs in smog chambers.The finding in this study reveals that SOA production from biomass burning is much higher than previously thought,and highlights the urgent need for more research on the IVOCs from biomass burning and potentially other emission sources.

外文关键词：

atmospheric chemistrybiomass burningsecondary organic aerosolintermediate volatility organic compounds

作者：

Kun Li、Jun Zhang、David M.Bell、Tiantian Wang、Houssni Lamkaddam、Tianqu Cui、Lu Qi、Mihnea Surdu、Dongyu Wang、Lin Du、Imad EI Haddad、Jay G.Slowik、Andre S.H.Prevot

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作者单位：

Environment Research Institute,Shandong University,Qingdao 266237,China

Laboratory of Atmospheric Chemistry,Paul Scherrer Institute,Villigen 5232,Switzerland

基金：

国家重点研发计划国家自然科学基金Swiss National Science FoundationEuropean Union's Horizon 2020 research and innovation programme under the Marie Sk?odowska-Curie

项目编号：

2023YFC371040042305100MOLORG 200020_188624PSI-FELLOW-Ⅲ-3i

出版年：

2024

DOI：

10.1093/nsr/nwae014

国家科学评论(英文版)

CSTPCD

ISSN：

年,卷(期)：2024.11(3)

参考文献量62