Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Heterogeneous ozonation kinetics of phenanthrene at the air–ice interface
Phenanthrene ozonation kinetics were measured on ice at −30 and −10 °C, and on a water surface at 22 °C using glancing angle laser-induced fluorescence. A Langmuir–Hinshelwood type kinetic mechanism was observed on ice. The maximum ozonation rates were a factor of ten higher on ice than on water. No temperature dependence to the kinetics was observed between −30 and −10 °C, suggesting that the differences in the rates on ice and water are due to different physical properties at the two surfaces. Fluorescence spectra of phenanthrene show significant self-association on ice that is not observed on water, adding further evidence for the hypothesis that the quasi-liquid layer at the air–ice interface presents a very different environment to liquid water.
Heterogeneous ozonation kinetics of phenanthrene at the air–ice interface
Phenanthrene ozonation kinetics were measured on ice at −30 and −10 °C, and on a water surface at 22 °C using glancing angle laser-induced fluorescence. A Langmuir–Hinshelwood type kinetic mechanism was observed on ice. The maximum ozonation rates were a factor of ten higher on ice than on water. No temperature dependence to the kinetics was observed between −30 and −10 °C, suggesting that the differences in the rates on ice and water are due to different physical properties at the two surfaces. Fluorescence spectra of phenanthrene show significant self-association on ice that is not observed on water, adding further evidence for the hypothesis that the quasi-liquid layer at the air–ice interface presents a very different environment to liquid water.
Heterogeneous ozonation kinetics of phenanthrene at the air–ice interface
Heterogeneous ozonation kinetics of phenanthrene at the air–ice interface
T F Kahan (Autor:in) / D J Donaldson (Autor:in)
Environmental Research Letters ; 3 ; 045006
01.10.2008
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch