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Showing 1 to 11 of 11 for “"Smog Chamber"”.
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Experimental Studies of the Heterogeneous Kinetics of OH Radicals with terbuthylazine, Adsorbed on Self- Synthesized SiO2 Particles, in a Temperature Controlled Aerosol Smog Chamber
… in the low temperature aerosol simulation chamber (LOTASC) at three temperatures. Self-synthesized, monodisperse SiO2 particles (diameter around 160 nm) were used as carrier particles in order to avoid any influence of agglomeration. The experimental results of second order rate constants …
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Elucidating the chemistry of particulate and chlorinated nitrates in the troposphere through method development, and chamber and field studies
… (SOA) was investigated in a newly constructed smog chamber. Uptake probabilities (γ) were determined by box modeling constrained to measured ClNO2 mixing ratios and SMPS derived aerosol surface area. An upper limit of γ< 4x10-4 was determined for (NH4)2SO4 and NH4HSO4 aerosol, but larger values …
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Chemical and Physical Studies of Secondary Organic Aerosol Formed from Beta-pinene Photooxidation
… were conducted in the York University smog chamber. The main objective was to identify the gas and particle phase products with an atmospheric pressure chemical ionization mass spectrometer (APCI-MS/MS). A wide variety of products were identified containing various functional groups …
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Formation of Nitrous Acid on Urban Surfaces
… urban surfaces were further investigated in a smog chamber using a White-type DOAS multi-reflection system. The NO2 uptake coefficients on these surfaces were calculated to be gNO2 ~10-8 on Teflon, ~10-7 on PE foil, ~10-5 on asphalt and concrete, ~3 x 10-6 on roof-tiles and flagstone-tiles, and …
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Experimental and theoretical examination of the chemical kinetics of a pollutant coating on porous particles
… - between gas and particle phase. In an aerosol smog chamber could be simulated the atmospheric degradation of airborne substances through hydroxyl radicals. The smog-chamber was cooled on 2 and -10°C and the degradation kinetic of semivolatile substance (Aldrin) coated on fine quartz particles …
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Formation of secondary organic aerosol and its processing by atmospheric halogen species – A spectroscopic study
… or from other sources. Based on aerosol smog-chamber experiments, the formation of secondary organic aerosols (SOA) from predominantly aliphatic (α-pinene) or aromatic (catechol and guaiacol) precursors and the processing of those model SOAs with simulated molecular and naturally released …
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Simulating the atmospheric primary and secondary organic aerosols
… transport model (PMCAMx) based on recent smog chamber studies. The new modeling framework is based on the volatility basis-set approach: both primary and secondary organic components are assumed to be semivolatile and photochemically reactive and are distributed in logarithmically spaced …
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Hydrolysis and Atmospheric Oxidation Reactions of Perfluorinated Carboxylic Acid Precursors
… fate upon atmospheric oxidation. Using a smog chamber, the kinetics and degradation mechanisms of N-ethylperfluorobutyramide (EtFBA) were elucidated. The lifetime of EtFBA to oxidation by OH was found to be approximately 4 days. Using offline sampling, PFAMs were shown to give PFCAs upon …
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SPECIATION STUDIES FOR BIOGENIC VOLATILE ORGANIC COMPOUNDS AND SECONDARY ORGANIC AEROSOL GENERATED BY OZONOLYSIS OF VOLATILE ORGANIC COMPOUND MIXTURES
… measured with respect to VOC composition using smog chamber SOA generation and scanning mobility particle sizing. PM in the chamber was collected onto filters and extracted, and the individual products of SOA were identified and quantified by GC/MS. The condensed-phase SOA products generated …