Uptake of N2O5 on dust

The heterogeneous chemical kinetics of N2O5 on CaCO3 and other atmospheric mineral dust surrogates

Uptake experiments of N2O5 on several mineral dust powder samples were carried out under continuous molecular flow conditions at 298±2 K. At [N2O5]0=(4.0±1.0)×10 cm−3 we have found γ ss values ranging from (3.5±1.1)×10−2 for CaCO3 to (0.20±0.05) for Saharan Dust with γss decreasing as [N2O5]0 increased. The uptake coefficients reported in this work are to be regarded as upper limiting values ow...

Influence of aerosol chemical composition on N2O5 uptake: airborne regional measurements in northwestern Europe

Aerosol chemical composition was found to influence nighttime atmospheric chemistry during a series of airborne measurements in northwestern Europe in summer conditions, which has implications for regional air quality and climate. The uptake of dinitrogen pentoxide, γ (N2O5), to particle surfaces was found to be modulated by the amount of water content and ammonium nitrate present in the aeroso...

Reactive uptake of N2O5 to internally mixed inorganic and organic particles: the role of organic carbon oxidation state and inferred organic phase separations

We measured N2O5 reactive uptake onto mixed organic/inorganic submicron particles using organic compounds with a variety of oxidation states (using mainly atomic O : C ratios as a proxy) and molecular weights. The organic mass fraction, organic molecular composition, and relative humidity (RH) were varied to assess their effects separately on the N2O5 uptake coefficient, γ (N2O5). At a constant...

Products and kinetics of N2O5 interaction on mineral dust

The heterogeneous chemical kinetics of N2O5 on CaCO3 and other atmospheric mineral dust surrogates F. Karagulian, C. Santschi, and M. J. Rossi Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Pollution Atmosphérique et Sol (EPFL, LPAS), Bâtiment CH H5, Station 6, CH-1015 Lausanne, Switzerland Received: 7 September 2005 – Accepted: 12 September 2005 – Published: 24 October 2005 Correspon...

Interactive comment on “The interaction of N2O5 with mineral dust: aerosol flow tube and Knudsen reactor studies” by C. Wagner et al