Physico-chemical behaviour of atmospheric pollutants / edited by G. Restelli and G. Angeletti. - Dordrecht : Kluwer Academic, c1990. - xx, 735 p. : il. - Air pollution research report, 23. .

Proceedings of the Fifth European Symposium held in Varese, Italy, September 25-28, 1989

Contenido:
Session I - Development of Analytical Methods to Measure Trace Components of The Atmosphere.- Summary of Session I.- Determination of NH3, HNO3 and NH4NO3 in ambient air by automated thermodenuder systems and a wet annular denuder system.- Nouveau dispositif inertiel et diffusionnel pour la mesure de la granulometrie des aerosols.- A passive diffusion tube sampler for the measurement of atmospheric NO2. A new approach.- Studies on the spectroscopy and chemistry of some atmospheric hydroperoxides with a tunable diode laser.- A method for methyl iodide measurement in the lower troposphere.- Laboratory intercomparisons in the EMEP (European Monitoring and Evaluation Programme).- Air and precipitation quality and trends in Europe. Results of the EMEP network.- The relationship between ozone, nitrogen oxides and volatile organic compounds in boundary layer episodes.- Ground based cloud and fog experiments.- Intercomparison of wet-only collectors for measuring wet deposition.- Field intercomparison exercise on nitric acid and nitrate measurement: critical evaluation of the results.- Trends of photochemical oxidants observed during the intercomparison field exercise on nitric acid and nitrate measurements held in Montelibretti.- Gas phase measurements of NH3 and NH4+ with Differential Optical Absorption Spectroscopy and Gas Stripping Scrubber in combination with Flow Injection Analysis.- Simultaneously sampling of NH3, HNO3, HNO2, HCl, SO2 and H2O2 in ambient air by a wet annular denuder system.- Determination of organic peroxides.- Trotospheric OH radical measurement techniques: recent developments.- Three methods of hydrogen peroxide determination in rainwater.- Measurements of the non-filterable share of heavy metals and metalloids in ambient air 114.- Statistical methods in intercalibration studies of SO2 and NOX monitors.- Determination of sulfur compounds in atmospheric matrices after derivatization using a GC-FPD method - A laboratory study with respect to possible applications.- The physico-chemical properties of aerosols in relation to their extinction coefficient.- Generation of standard atmospheres of nitrous acid.- A new analyzer for sulfuric acid and sulfur aerosols in ambient air: development and measurements.- Session II/A - Atmospheric Chemical and Photochemical Processes.- Summary of session II.- Laboratory kinetic studies of reactions of iodine species occurring in marine atmosphere.- Reactions of IO radicals with sulphur containing compounds.- Atmospheric behaviour of chloroacetaldehydes.- Products and mechanism of the reaction between NO3 and dimethylsulphide in air.- Reactions of peroxyacetyl radicals with sulfur compounds.- The BrO + ClO reaction and the polar stratospheric ozone.- The kinetics of the reaction ClO + ClO = Cl2O2 and its implications for polar ozone depletions.- The reactions of NO3 with atoms and radicals.- Possible heterogeneous reaction processes inducing depletion of the ozone layer in the stratospheric Antartica.- Degradation products of chlorinated hydrocarbons.- Atmospheric removal processes for chlorine-containing compounds.- UV spectrum and kinetics of the trichloromethyl radical.- FTIR studies of the reaction between the nitrate radical and haloethenes. Part. I Vinylchloride.- Spectroscopic measurements of NO2, O3, SO2, IO and NO3 in maritime air.- Session II/B - Atmospheric Chemical And Photochemical Processes Joint Eurotrac - Cost 611 - Project Halipp.- A pulse radiolysis study of the chemistry of oxysulphur radicals in aqueous solution.- Kinetics of the reactions of the S04 radical with SO4-, S2O82-, H2O and Fe2+.- Mechanism of the homogeneous liquid oxidation of sulphur(IV) to sulphur(VI) by hydrogen peroxide.- OH quantum yields for the photodecomposition of FE(III) hydroxo complexes in aqueous solution and the reaction of OH with hydroxymethanesulfonate.- Trace gas exchange kinetics at the air/water interface.- Heterogeneous production of CI atoms under simulated tropospheric conditions in a smog chamber.- Phototransformation of O-Xylene over atmospheric solid aerosols in the presence of O2 and H2O.- Etude en enceinte de simulation de la photodegradation du naphtalene en presence de particules.- Absolute OH quantum yields in the laser photolysis of aqueous solutions of nitrate, nitrite and H2 O2 AT 308 and 351 NM.- Session II/C - Atmospheric Chemical And Photochemical Processes Joint Eurotrac-Cost 611 - Project Lactoz.- Reactions of OH radicals with alkyl nitrates.- Tropospheric oxidation of toluene: reactions of some intermediate radicals.- Adduct formation of OH with benzene and toluene and reaction of the adducts with NO and N02.- Temperature dependence of reactions of the nitrate radical with alkanes.- Heterogeneous transformation of nitrogen containing compounds: pan decomposition.- Methylperoxy self-reaction: products and branching ratio between 223 and 333 K.- Kinetic study of the equilibria: CH3O2 + NO2 CH3O2NO2 and CH3C(O)O2 + NO2 CH3C(O)O2NO2 in the gas phase by flash photolysis.- Laser photofragment emission: a novel technique for the study of gas phase reactions of the CH302 radical.- Arrhenius parameters for the gas-phase reaction of ozone with a series of 1-Alkenes over the temperature range 240-324K.- Photooxidation study of Methylethylketone and methylvinylketone.- Room temperature rate coefficient for the reaction between CH3O2 and NO3.- The reaction of OH with C2H2 and the subsequent reaction of hydroxyvinyl with O2.- Laboratory studies of HOCH2CH2O2 radicals produced by the photolysis of 2-iodoethanol in the presence of O2.- Reaction of monoterpene hydrocarbons with O3, SO2 and NO2 -Formation of acidic compounds.- Products and mechanism of the gas phase reaction between the nitrate radical and arenes.- The Self-Reaction of the NO3 Radical.- Session III/A - Field Measurements and Their Interpretation.- Summary of session III.- A two years study of oxidants (pan and ozone) in a forested area.- Study of rain and fogs collected in the Vosges region (1986-1988).- Coxy's in the atmosphere.- The Deposition of acidifying components on wet surfaces -Occurrence and chemical composition of dew.- A comparative study of two microphysical schemes for mesocale modeling of pollutant transport and deposition.- Daily profil study of the atmospheric DMS concentration near to an intense coastal source at the "Pointe de Penmarc'H".- Principal component analysis of wet deposition in finland.- Nitrous acid at Mainz: Observation and implication for its formation Mechanism.- Interregional modeling of air pollution in Portugal: preliminary results.- An advanced model for the description of conversion processes of nitrogen oxides in plumes of large point sources.- Contribution d'un panache de centrale thermique aux depots acides. Calculs a l'aide du code parade de depots humides et de compositions chimiques de pluies.- Estimation of wet and dry deposition of Pb and Cd over the Ligurian sea.- Low molecular weight organic compounds in the PO valley fog water.- High concentrations of sulfur dioxide in the middle and upper troposphere - case studies and meteorological analysis.- Ion deposition due to fog water interception at high elevations.- Aircraft measurements of hydrogen peroxide over the Northeasten United States.- Results of Aircraft measurements of transboundary mass fluxes of air pollutants over the Federal Republic of Germany.- Measurements of gaseous hydrogen peroxide in Southern Germany.- Data interpretation from a transportable laboratory in a complex coastal site.- Measurements of NO and NOy between 0-14 KM altitude over Europe.- Formaldehyde measurements in the free troposphere.- Formic and acetic acid in presence of cloud and dew water.- One-Year measurements of pan in the Paris basin: temperature and wind direction effect.- Temporal variations of formaldehyde in continental air masses.- Transport and deposition of S - and N - Compounds in central Europe modelled as annual averages.- Daily profil study of the atmospheric formaldehyde concentrations at the "pointe de Penmarc'H" under pure marine conditions.- Modelling the influence of meteorological and other factors on the chemistry of oxidized nitrogen compounds.- Temporal Variability of atmospheric Pb, Cu and Mn concentrations and fluxes over the Northwestern Mediterranean Sea.- Identification of polycyclic aromatic nitro derivatives during a winter photochemical episode in Paris.- Monitoring of Peroxides and other Trace Gas Constituents at a high Alpine Station.- Flux measurements over prairie Grasslands in Northern Colorado.- Session III/B - Field Measurements and Their Interpretation 1988 Polastern Cruise Ant VII/1.- Measurements of photolysis frequencies of O3 and NO2 and ambient O3 concentration on the polarstem cruise ant VII/1.- The Meridional distribution of ozone and water vapor over the Atlantic Ocean between 30 DegreesS and 52 DegreesN in September/October 1988.- Hydrogen peroxide concentration variations in marine Tropospheric atmosphere.- Polarstern 1988: Measurements of trace gases using tunable diode lasers and intercomparisons with other methods.- Detection of nitric acid in air by a laser-photolysis fragment-fluorescence (LPFF) method 651.- The latitudinal distribution of light non-methane hydrocarbons over the Mid-Atlantic between 40 DegreesN and 30 DegreesS.- The latitudinal distribution of NMHC in the Atlantic and their fluxes into the atmosphere.- Formaldehyde background levels over the Atlantic Ocean during the polarstem crossing from Bremerhaven to Rio Grande do Sul.- Methanesulfonate and non-sea-salt sulfate in the marine aerosol and precipitation.- DMS distribution study over the atlantic ocean during the polarstem crossing from Bremerhaven to Rio Grande do Sul.- Biogenic sulfur compounds in seawater and the marine atmosphere.- Net total radiation at the sea surface of the Atlantic ocean between 30 DegreesN and 30 DegreesS.- Surface NO- and NO2 -mixing ratios measured between 30 DegreesN and 30 DegreesS in the Atlantic region.- Measurements of peroxyacetyl nitrate in the marine atmosphere.- Concentration and sources of trace elements over the Atlantic Ocean.- Summary of the Symposium.- List of Participants.- Index of Authors.