Naslov
Ozone Destruction on Solid Particles

Autori
Alebić-Juretić, Ana ; Cvitaš, Tomislav ; Klasinc, Leo

Izvornik
Environmental monitoring and assessment (0167-6369) 44 (1997), 1-3; 241-247

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
ozone; decomposition; silica-gel; pollen; coal fly ash; titanium oxide; sodium halides; fluidized bed reactor

Sažetak
Ozone (O_3) is an important constituent of the Earth atmosphere, either stratosphere, where it has a beneficial role to protect Earth"s surface from harmful UV-B radiation, or troposphere where it is considered an air pollutant. We investigated the ozone destruction on solid particles of natural or anthropogenic origin as: silica-gel, pollen, coal fly ash, titanium dioxide with different specific surface (s) and sodium halides (NaCl, NaBr and NaI). The experiments were conducted in a fluidized bed reactor with elevated ambient concentrations of O_3 (100 ppb) employed. The results indicate that the destruction of O_3 depends upon: sample quantity (silica-gel with equal s), sample surface (TiO_2 with different s) and chemical composition (coal fly ash comparative to wood ash). Interesting results were obtained with sodium halides: no effect on O_3 concentrations was detected with NaCl, NaBr shows a certain destruction, while NaI removes completely O_3 from the air stream. In the experiments with NaI doped NaCl, the destruction of O_3 was dependent on NaI quantity.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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