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Reactions of Iodide and Hydrated Iodide with Ozone

PhD defence, Thursday 20 June 2019, Ricky Teiwes.

2019.06.20 | Sunitha Satkunam

Ricky Teiwes

During his studies Ricky Teiwes investigated reactions between iodide and ozone, as well as hydrated iodide and ozone. Iodine exerts a significant influence on atmospheric composition, through catalytic ozone destruction, influence on HOx and NOx cycles and involvement in new particle formation. Iodine is emitted into the atmosphere through two major pathways, where one of the pathways is based on the reaction of iodide and ozone at the surface layer of the ocean and sea spray aerosol particles.

Ricky Teiwes studied these reactions in detail in the gas-phase at 300 K in a radio-frequency ion trap. The results represent a direct measurement of the sequential oxidation of iodide, where previously unknown reaction rate constants are determined, a significant impact of hydration is demonstrated and new reaction pathways are found.

The PhD degree was completed at the Department of Physics and Astronomy, Science and Technology, Aarhus University.

This résumé was prepared by the PhD student.

Time: Thursday 20 June 2019 at 10.00
Place: Building 1523, room 318, Fys. Aud., Department of Physics and Astronomy, Aarhus University
Title of PhD thesis: Reactions of Ozone with Iodide and Hydrated Iodide
Contact information: Ricky Teiwes, e-mail: teiwes@phys.au.dk
Members of the assessment committee:
Professor Lucy Carpenter, Department of Chemistry, University of York, United Kingdom
Senior Scientist Michael Martins, Institut für Experimentalphysik, University of Hamburg, Germany
Associate Professor Jan Arlt (chair), Department of Physics and Astronomy, Aarhus University
Main supervisor:
Associate Professor Henrik B. Pedersen, Department of Physics and Astronomy, Aarhus University
Professor Merete Bilde, Department of Chemistry, Aarhus University
Language: The PhD dissertation will be defended in English

The defence is public.
The PhD thesis is available for reading at the Graduate School of Science and Technology/GSST, Ny Munkegade 120, building 1521, 8000 Aarhus C.

PhD defence
12183 / i43