Product formation from the gas-phase reactions of OH radicals and O3 with a series of monoterpenes

Hakola, Hannele; Arey, Janet; Aschmann, Sara M.; Atkinson, Roger

doi:10.1007/bf00694375

Cited by 282 publications

(313 citation statements)

References 47 publications

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“…Because the SOA mixture from the limonene/O 3 SOA does not contain significant amounts of 1,2-dicarbonyls, 30,31 its NH 4 + -mediated browning mechanism may be different from that previously-proposed for glyoxal and methylglyoxal, which produce oligomeric imidazole-based compounds in reactions with NH 4 + and amino acids. [5][6][7]9,32,33 As such, the active brown-carbon precursors in the limonene/O 3 SOA mixture have yet to be identied.…”

Section: -24mentioning

confidence: 78%

Brown carbon formation from ketoaldehydes of biogenic monoterpenes

et al. 2013

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Section: -24mentioning

confidence: 78%

Brown carbon formation from ketoaldehydes of biogenic monoterpenes

et al. 2013

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“…The SOA concentration was also expressed in units of µg m -3 . The reaction rate for ozone and limonene, k O3 , was set to the experimentally determined value of 5.16 × 10 -6 ppb -1 s -1 (Hakola et al, 1994).…”

Section: Modeling Total Particle Mass Formationmentioning

confidence: 99%

Secondary organic aerosol from ozone-initiated reactions with terpene-rich household products

Coleman

Lunden

Destaillats

et al. 2008

Atmospheric Environment

123

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We analyzed secondary organic aerosol (SOA) data from a series of small-chamber experiments in which terpene-rich vapors from household products were combined with ozone under conditions analogous to product use indoors. Reagents were introduced into a continuously ventilated 198 L chamber at steady rates. Consistently, at the time of ozone introduction, nucleation occurred exhibiting behavior similar to atmospheric events. The initial nucleation burst and growth was followed by a period in which approximately stable particle levels were established reflecting a balance between new particle formation, condensational growth, and removal by ventilation. Airborne particles were measured with a scanning mobility particle sizer (SMPS, 10 to 400 nm) in every experiment and with an optical particle counter (OPC, 0.1 to 2.0 µm) in a subset. Parameters for a three-mode lognormal fit to the size distribution at steady state were determined for each experiment. Increasing the supply ozone level increased the steadystate mass concentration and yield of SOA from each product tested. Decreasing the airexchange rate increased the yield. The steady-state fine-particle mass concentration (PM 1.1 ) ranged from 10 to > 300 µg m -3 and yields ranged from 5% to 37%. Steady-state nucleation rates and SOA mass formation rates were on the order of 10 cm -3 s -1 and 10 µg m -3 min -1 , respectively.

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“…between d-limonene and ozone produces primarily formaldehyde, 4-acetyl-1-methylchclohexene, limona ketone, and limonaldehyde (Grosjean et al 1992;Hakola et al 1994;Glasius et al 2000), while the products of the isoprene/ozone reaction are primarily formaldehyde, hydrogen peroxide, methacrolein, methylvinyl ketone, methacrylic acid, and 3-methylfuran (Sauer et al 1999;Helmig et al 1998). Hydroxyl radical is also formed in all 3 terpene/ozone systems (Atkinson et al 1992).…”

Section: Introductionmentioning

confidence: 99%

Generation and Quantification of Ultrafine Particles through Terpene/Ozone Reaction in a Chamber Setting

Rohr

Weschler

Koutrakis³

et al. 2003

Aerosol Science and Technology

110

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Terpene/ozone reactions produce gas-and condensed-phase products and thus contribute to both indoor and outdoor aerosol. These reactions may be important in indoor settings, where terpenes are generated from indoor sources and ambient ozone can reach significant levels. Moreover, airway irritation has been observed in mice exposed to terpene oxidation products (OPs). The aim of this study was to characterize a system for generating and quantifying ultrafine particles formed through terpene/ozone reactions in preparation for inhalation toxicology experiments. Two common monoterpenes, α-pinene and d-limonene, and a hemiterpene, isoprene, were investigated. Ozone and gas-phase terpene were introduced continuously into a reaction flow tube, from which reaction products entered a plexiglass chamber. Particle number, mass, and size distribution (∼15-750 nm) were monitored in the chamber for various reactant concentrations and air exchange rates (AERs). In all experiments, ozone was the limiting reagent and the reaction rate was much more rapid than the AER. Particles formed rapidly and in high concentrations in the pinene and limonene systems. Particle formation was slower in the isoprene system and fewer particles were formed; moreover, particle diameters were smaller. In all 3 systems, progressive growth of particles was observed due to condensation and coagulation processes. The isoprene system displayed instability with respect to aerosol characteristics and did not reach steady-state conditions. In the pinene system, ozone concentration was a strong predictor of steady-state particle number and mass concentration and particle diameter. The particle number was greater at higher AERs, but particles were smaller. This study is the first to incorporate measurement of ultrafine particles formed from terpene/ozone reactions into a controlled exposure Address correspondence to Annette C. Rohr, EPRI, 3412 Hillview Avenue, Palo Alto, CA 94304-1395. E-mail: arohr@epri.com chamber setting. Following system characterization, we will conduct mouse exposures to further investigate the respiratory effects of gas-and particle-phase terpene OPs.

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Product formation from the gas-phase reactions of OH radicals and O3 with a series of monoterpenes

Cited by 282 publications

References 47 publications

Brown carbon formation from ketoaldehydes of biogenic monoterpenes

Brown carbon formation from ketoaldehydes of biogenic monoterpenes

Secondary organic aerosol from ozone-initiated reactions with terpene-rich household products

Generation and Quantification of Ultrafine Particles through Terpene/Ozone Reaction in a Chamber Setting

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