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Chemical Reactivity and Liquid/Nonliquid States of Secondary Organic Material
Li Y.J.1,2; Liu P.1; Gong Z.1; Wang Y.3; Bateman A.P.1; Bergoend C.1,4; Bertram A.K.5; Martin S.T.1,6
2015
Source PublicationEnvironmental Science and Technology
ISSN0013-936X
Volume49Issue:22Pages:13264-13274
Abstract

The reactivity of secondary organic material (SOM) of variable viscosity, ranging from nonliquid to liquid physical states, was studied. The SOM, produced in aerosol form from terpenoid and aromatic precursor species, was reacted with ammonia at variable relative humidity (RH). The ammonium-to-organic mass ratio (MNH4 +/MOrg) increased monotonically from <5% RH to a limiting value at a threshold RH, implicating a transition from particle reactivity limited by diffusion at low RH to one limited by other factors at higher RH. For the studied size distributions and reaction times, the transition corresponded to a diffusivity above 10-17.5 ± 0.5 m2 s-1. The threshold RH values for the transition were <5% RH for isoprene-derived SOM, 35-45% RH for SOM derived from α-pinene, toluene, m-xylene, and 1,3,5-trimethylbenzene, and >90% for β-caryophyllene-derived SOM. The transition RH for reactivity differed in all cases from the transition RH of a nonliquid to a liquid state. For instance, for α-pinene-derived SOM the transition for chemical reactivity of 35-45% RH can be compared to the nonliquid to liquid transition of 65-90% RH. These differences imply that chemical transport models of atmospheric chemistry should not use the SOM liquid to nonliquid phase transition as one-to-one surrogates of SOM reactivity.

DOI10.1021/acs.est.5b03392
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Environmental Sciences
WOS IDWOS:000365151200021
The Source to ArticleScopus
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Cited Times [WOS]:48   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Corresponding AuthorBertram A.K.; Martin S.T.
Affiliation1.School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
2.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Avenida da Universidade, Taipa, Macau, China
3.Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, United States
4.Department of Energy and Environment, National Institute of Applied Science of Lyon, Villeurbanne 69100, France
5.Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
6.Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
First Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Li Y.J.,Liu P.,Gong Z.,et al. Chemical Reactivity and Liquid/Nonliquid States of Secondary Organic Material[J]. Environmental Science and Technology,2015,49(22):13264-13274.
APA Li Y.J..,Liu P..,Gong Z..,Wang Y..,Bateman A.P..,...&Martin S.T..(2015).Chemical Reactivity and Liquid/Nonliquid States of Secondary Organic Material.Environmental Science and Technology,49(22),13264-13274.
MLA Li Y.J.,et al."Chemical Reactivity and Liquid/Nonliquid States of Secondary Organic Material".Environmental Science and Technology 49.22(2015):13264-13274.
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