Entfernung und Interkonversionen von Oxidantien in der atmosphaerisch-waessrigen Phase

Description: Das Projekt "Entfernung und Interkonversionen von Oxidantien in der atmosphaerisch-waessrigen Phase" wird vom Umweltbundesamt gefördert und von Universität-Gesamthochschule Essen, Fachbereich 8 Chemie, Institut für Physikalische und Theoretische Chemie durchgeführt. This project is concerned with laboratory studies of the phase transfer and the aqueous phase chemistry of tropospheric oxidants. The accomodation coefficients of important gas phase oxidants like ozone and methylhydroperoxide into water droplets will be determined. The influence of ozone on atmospheric aqueous phase chemistry will be studied with respect to: 1) The oxidation of S (IV) in the presence of transition metal ions (eg Fe, Mn, Cu, V, Co) and 2) its reactions with transition metal ions TMI's and the role of the resulting intermediates. Elementary reactions of the radical anions SO-4 and SO-5 which are key intermediates in the atmospheric aqueous phase oxidation of S (IV) will be studied with respect to potential loss mechanisms in reactions with TMI's like Fe (II), Mn (II), and organic cloudwater constituents like HCHO, CHOOH, etc. Moreover, this project addresses the reactivity of organic peroxy radicals which are either formed by direct uptake from the gas phase or in reactions of radical oxidants with organic compounds within the aqueous phase. It is expected to obtain a number of rate data concerning phase transfer and reactivity, which could improve the understanding of the complex tropospheric chemistry system.

Types:

SupportProgram

Origin: /Bund/UBA/UFORDAT

Tags: Ozon ? Schwefeloxid ? Oxidationsmittel ? Anionen ? Metall ? Organische Verbindung ? Daten ? Ionen ? Oxidation ? Redoxpotential ? Studie ? Troposphäre ? Zwischenprodukt ? Wasser ? Atmosphärenchemie ? Chemische Reaktion ? Laboruntersuchung ? Phasenuebergang ? Uebergangsmetalle ? Waessrige-Phase ?

Region: Nordrhein-Westfalen

Bounding box: 6.76339° .. 6.76339° x 51.21895° .. 51.21895°

License: cc-by-nc-nd/4.0

Language: Deutsch

Organisations

• Centre National de la Recherche Scientifique, Laboratoire de Physico-Chimie de l'Atmosphere (Mitwirkende)
• Kommission der Europäischen Gemeinschaften Brüssel (Bereitsteller*in)
• Leibniz-Institut für Troposphärenforschung e.V. (Mitwirkende)
• Risoe National Laboratory (Forskningscenter Risoe), Department of Environmental Science and Technology, Section for Chemical Reactivity (Mitwirkende)
• Umweltbundesamt (Bereitsteller*in)
• University Leeds, Cookridge Radiation Research Centre (Mitwirkende)
• Universität-Gesamthochschule Essen, Fachbereich 8 Chemie, Institut für Physikalische und Theoretische Chemie (Betreiber*in)

Time ranges: 1994-04-01 - 1996-03-31

Alternatives

• Language: Englisch/English https://ufordat.uba.de/

Status

Aktiv

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