Heterogeneous reactions of isoprene-derived epoxides: Reaction probabilities and molar secondary organic aerosol yield estimates

Theran P. Riedel; Ying Hsuan Lin; Sri Hapsari Budisulistiorini; Cassandra J. Gaston; Joel A. Thornton; Zhenfa Zhang; William Vizuete; Avram Gold; Jason D. Surratt

doi:10.1021/ez500406f

Heterogeneous reactions of isoprene-derived epoxides: Reaction probabilities and molar secondary organic aerosol yield estimates

Theran P. Riedel, Ying Hsuan Lin, Sri Hapsari Budisulistiorini, Cassandra J. Gaston, Joel A. Thornton, Zhenfa Zhang, William Vizuete, Avram Gold, Jason D. Surratt

Research output: Contribution to journal › Article › peer-review

59 Scopus citations

Abstract

A combination of flow reactor studies and chamber modeling is used to constrain two uncertain parameters central to the formation of secondary organic aerosol (SOA) from isoprene-derived epoxides: (1) the rate of heterogeneous uptake of epoxide to the particle phase and (2) the molar fraction of epoxide reactively taken up that contributes to SOA, the SOA yield (φ_SOA). Flow reactor measurements of the trans-β-isoprene epoxydiol (trans-β-IEPOX) and methacrylic acid epoxide (MAE) aerosol reaction probability (γ) were performed on atomized aerosols with compositions similar to those used in chamber studies. Observed γ ranges for trans-β-IEPOX and MAE were 6.5 × 10^-4-0.021 and 4.9-5.2 × 10^-4, respectively. Through the use of a time-dependent chemical box model initialized with chamber conditions and γ measurements, φ_SOA values for trans-β-IEPOX and MAE on different aerosol compositions were estimated between 0.03-0.21 and 0.07-0.25, respectively, with the MAE φ_SOA showing more uncertainty.

Original language	English (US)
Pages (from-to)	38-42
Number of pages	5
Journal	Environmental Science and Technology Letters
Volume	2
Issue number	2
DOIs	https://doi.org/10.1021/ez500406f
State	Published - Feb 10 2015
Externally published	Yes

ASJC Scopus subject areas

Environmental Chemistry
Ecology
Water Science and Technology
Waste Management and Disposal
Pollution
Health, Toxicology and Mutagenesis

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10.1021/ez500406f

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Heterogeneous reactions of isoprene-derived epoxides : Reaction probabilities and molar secondary organic aerosol yield estimates. / Riedel, Theran P.; Lin, Ying Hsuan; Budisulistiorini, Sri Hapsari; Gaston, Cassandra J.; Thornton, Joel A.; Zhang, Zhenfa; Vizuete, William; Gold, Avram; Surratt, Jason D.

In: Environmental Science and Technology Letters, Vol. 2, No. 2, 10.02.2015, p. 38-42.

Research output: Contribution to journal › Article › peer-review

Riedel, Theran P. ; Lin, Ying Hsuan ; Budisulistiorini, Sri Hapsari ; Gaston, Cassandra J. ; Thornton, Joel A. ; Zhang, Zhenfa ; Vizuete, William ; Gold, Avram ; Surratt, Jason D. / Heterogeneous reactions of isoprene-derived epoxides : Reaction probabilities and molar secondary organic aerosol yield estimates. In: Environmental Science and Technology Letters. 2015 ; Vol. 2, No. 2. pp. 38-42.

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abstract = "A combination of flow reactor studies and chamber modeling is used to constrain two uncertain parameters central to the formation of secondary organic aerosol (SOA) from isoprene-derived epoxides: (1) the rate of heterogeneous uptake of epoxide to the particle phase and (2) the molar fraction of epoxide reactively taken up that contributes to SOA, the SOA yield (φSOA). Flow reactor measurements of the trans-β-isoprene epoxydiol (trans-β-IEPOX) and methacrylic acid epoxide (MAE) aerosol reaction probability (γ) were performed on atomized aerosols with compositions similar to those used in chamber studies. Observed γ ranges for trans-β-IEPOX and MAE were 6.5 × 10-4-0.021 and 4.9-5.2 × 10-4, respectively. Through the use of a time-dependent chemical box model initialized with chamber conditions and γ measurements, φSOA values for trans-β-IEPOX and MAE on different aerosol compositions were estimated between 0.03-0.21 and 0.07-0.25, respectively, with the MAE φSOA showing more uncertainty.",

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AU - Gaston, Cassandra J.

AU - Thornton, Joel A.

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Heterogeneous reactions of isoprene-derived epoxides: Reaction probabilities and molar secondary organic aerosol yield estimates

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