Photo-enhanced ozone uptake onto organic films
Abstract
The uptake coefficients of ozone onto organic films of nine aromatic compounds (catechol, benzophenone, 4- nitrophenol, 1,7-dihydroxynaphthalene, 1,7-dihydroxynaphthoic acid, 4-benzylbenzoic acid, 1-hydroxy-2- naphtaldehyde, 2,6-dihydroxyanthraquinone, 1,7-dihydroxyanthracene) and humic substances have been determined using a flow-tube reactor. The uptake coefficients were determined at various ozone concentrations, temperatures and relative humidity. The experiments were performed in dark and light conditions. Two sets of lamps have been used: one set in the UV region (wavelength between 340-390 nm) and another in the visible region (wavelength between 400-680 nm). The results show a main feature. Almost all the compounds investigated exhibit a remarkable photo-enhanced ozone uptake upon irradiation. Further studies on chemical composition and contact angles would be performed in the near future.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2006
- Bibcode:
- 2006AGUFM.A22C..02G
- Keywords:
-
- 0305 Aerosols and particles (0345;
- 4801;
- 4906)