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Showing 1 to 6 of 6 for “"Uptake Coefficient"”.
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Development of a Knudsen Cell Reactor for Measuring the Uptake of Atmospheric Gases on Particulate Matter
… processes. However, little is known about the uptake and reactivity of volatile organic compounds on particulates found in the environment. A Knudsen cell was designed and constructed for providing precise measurement of reaction probabilities within these systems. The instrument was validated …
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Heterogeneous Reactions of Nitric Acid and Dinitrogen Pentoxide on Mineral Dust Surfaces: A Knudsen Reactor Study
… smectite, montmorillonite and palygorskite. The uptake of both trace gases was investigated at concentrations as low as 10^9 cm^-3 (HNO3) and 10^10 cm^-3 (N2O5) and found to be large and irreversible. For HNO3 uptake coefficients of the order of 0.1 werde determined. Uptake coefficients of N2O5 …
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Physical and chemical characterization of single atmospheric aerosols: Laboratory studies of interactions of acidic trace gases with sea -salt aerosols, and, Development efforts for an aerosol charging system using a corona discharge
… a polluted marine boundary layer. The reactive uptake coefficient between nitric acid and sea-salt aerosols under a variety of relative humidity and alkalinity conditions was measured. The uptake coefficient varied strongly with changes in relative humidity, time and alkalinity. In addition, …
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Quartz Crystal Microbalance Studies of Dimethyl Methylphosphonate Sorption Into Trisilanolphenyl-Poss Films
… x-ray photoelectron spectroscopy, and uptake coefficient determinations [1]. In our study, the quartz crystal microbalance (QCM) is used to study the sorption phenomena of DMMP into highly ordered Langmuir-Blodgett (LB) films of TPP. In a saturated environment, DMMP sorbs into the TPP …
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Atmosphärische Untersuchungen der Wechselwirkung von Mineralstaub mit den Spurengasen HNO3 und SO2
… der die HNO3-Aufnahme charakterisierende Größe (uptake coefficient gamma), basierend auf in-situ-Messungen vorgenommen werden: gamma(HNO3) = 0.033. Im Gegensatz dazu konnte eine Mineralstaub-SO2-Antikorrelation, wie sie in Labormessungen anderer Gruppen festgestellt wurde, nicht gemessen werden. …
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Formation of Nitrous Acid on Urban Surfaces
… 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 ~2 x 10-5 on grass. The higher values were found to be well …