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Secondary organic aerosol formation and organic nitrate yield from NO3 oxidation of biogenic hydrocarbons.

ABSTRACT: The secondary organic aerosol (SOA) mass yields from NO3 oxidation of a series of biogenic volatile organic compounds (BVOCs), consisting of five monoterpenes and one sesquiterpene (?-pinene, ?-pinene, ?-3-carene, limonene, sabinene, and ?-caryophyllene), were investigated in a series of continuous flow experiments in a 10 m(3) indoor Teflon chamber. By making in situ measurements of the nitrate radical and employing a kinetics box model, we generate time-dependent yield curves as a function of reacted BVOC. SOA yields varied dramatically among the different BVOCs, from zero for ?-pinene to 38-65% for ?-3-carene and 86% for ?-caryophyllene at mass loading of 10 ?g m(-3), suggesting that model mechanisms that treat all NO3 + monoterpene reactions equally will lead to errors in predicted SOA depending on each location's mix of BVOC emissions. In most cases, organonitrate is a dominant component of the aerosol produced, but in the case of ?-pinene, little organonitrate and no aerosol is formed.

SUBMITTER: Fry JL 

PROVIDER: S-EPMC4204451 | biostudies-literature | 2014 Oct

REPOSITORIES: biostudies-literature

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Secondary organic aerosol formation and organic nitrate yield from NO3 oxidation of biogenic hydrocarbons.

Fry Juliane L JL   Draper Danielle C DC   Barsanti Kelley C KC   Smith James N JN   Ortega John J   Winkler Paul M PM   Lawler Michael J MJ   Brown Steven S SS   Edwards Peter M PM   Cohen Ronald C RC   Lee Lance L  

Environmental science & technology 20141008 20

The secondary organic aerosol (SOA) mass yields from NO3 oxidation of a series of biogenic volatile organic compounds (BVOCs), consisting of five monoterpenes and one sesquiterpene (α-pinene, β-pinene, Δ-3-carene, limonene, sabinene, and β-caryophyllene), were investigated in a series of continuous flow experiments in a 10 m(3) indoor Teflon chamber. By making in situ measurements of the nitrate radical and employing a kinetics box model, we generate time-dependent yield curves as a function of  ...[more]

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