Description: Das Projekt "Control strategies for european air quality based on the tropospheric oxidation characteristics of volatile organic compounds" wird vom Umweltbundesamt gefördert und von Universität-Gesamthochschule Wuppertal, Fachbereich 9 Naturwissenschaften II, Physikalische Chemie durchgeführt. General Information: Concern for the environment is a high priority for National governments and the European Community. Photochemical Oxidant formation, arising from anthropogenic emissions of NOx and VOCs, is now widely recognised as a major problem on both a local and a global scale. There is considerable current interest in the high levels of oxygenated compounds which are both emitted and formed in the troposphere. Oxygenated organics are used as solvents and have also been suggested as alternative fuels. Further, nearly all oxidation processes of VOCs lead to the production of more or less reactive oxygenated reactants as intermediates. There is an urgent need for research in the atmospheric chemistry of these oxygenated species in order that regulation on emissions of this type of compound will lead to maximum environmental and economic benefits. It is proposed to organise an extensive research project in which basic mechanistic studies on the atmospheric behaviour of oxygenated organic substances in real air mixtures under a variety of different VOC compositions and NOx concentrations will be carried out. The aim of the project is to set up a general chemical mechanism using all available kinetic data which can be adjusted to different European situations. The results should enable the impact of a single VOC on the formation of ozone to be assessed and the impact of other photo toxic species within the group of photo oxidants which affect human health or are phytotoxic, to be estimated. The large number and type of oxygen-containing compounds, either released directly into the atmosphere or formed by the degradative oxidation of other VOCs, precludes studies on each possible compound. A feasible alternative to this unrealistic approach is to carefully select generic compounds for detailed investigation. This will give rise to structure-reactivity relationships which may be used to make reliable predictions concerning the kinetics and mechanism for oxidation of the various families of oxygenated organic compounds. Thus, the first part of the programme involves the generation of kinetic and mechanistic data for a number of generic compounds under well defined laboratory conditions. This should enable detailed mechanisms for the atmospheric oxidation of these species to be derived in the second part of the project. Testing of the mechanisms will be carried out under atmospheric conditions at the EUPHORE outdoor smog chamber facility. In the next phase it is hoped to develop methods for the strategic simplification of degradation schemes. Again, the results will be tested in the EUPHORE chamber. Finally, the chemical mechanism produced in the programme will be used in tropospheric models to provide information on the impact of single VOCs and other concomitant species within the group of photo oxidants which affect human health. ... Prime Contractor: University College Dublin, Department of Chemistry; Dublin; Ireland.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Wuppertal ? Ozon ? Brennstoff ? Gesundheitsgefährdung ? Photooxidantien ? Schadstoffgehalt ? VOC ? Landesregierung ? Lösungsmittel ? Oxidationsmittel ? Physikalische Chemie ? Sauerstoff ? Schadstoffwirkung ? Blei ? Europäische Gemeinschaften ? Irland ? Organische Verbindung ? Stickoxide ? Phytotoxizität ? Schadstoffemission ? Chemische Zusammensetzung ? Daten ? Oxidation ? Atmosphärenmodell ? Photochemische Reaktion ? Chemikalien ? Luftqualität ? Reaktionsmechanismus ? Schadstoffabbau ? Mensch ? Messdaten ? Stoffgemisch ? Studie ? Toxische Substanz ? Troposphäre ? Umweltschutzvorschrift ? Witterung ? Zwischenprodukt ? Laborversuch ? Modellierung ? Ozonbildung ? Menschliche Gesundheit ? Europa ? Abbauprodukt ? Wirkungsmodell ? Forschungsprojekt ? Simulation ? Datenerhebung ? Atmosphärenchemie ? Chemische Reaktion ? Luftüberwachung ? Reaktionskinetik ? Schadstoffverhalten ? Anthropogener Einfluss ? Atmosphäre ? Belastungssituation ? Speziation [Chemie] ? Molekülstruktur ? EUPHORE-chamber ?
Region: Nordrhein-Westfalen
Bounding box: 6.76339° .. 6.76339° x 51.21895° .. 51.21895°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1996-02-01 - 1998-07-31
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