Mineralisierung von 14CCl2F2 durch Oberflächenkatalyse / Mineralisation of 14CCl2F2 Catalysed by Active Surfaces
Open Access
- 1 June 1979
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 34 (6) , 822-826
- https://doi.org/10.1515/znb-1979-0612
Abstract
The reaction behaviour of CCl2F2 adsorbed on silica gel and a natural adsorbent (Mecca Sand) was investigated by means of the 14C-labelled compound. While in the dark no conversion of the substance on silica gel was detected, a significant degradation to 14CO2 was observed on the dry sand. The mineralisation (up to 70%) was due to the applied amount of sand. On irradiation with UV light (λ > 290 nm) the 14CCl2F2 adsorbed on silica gel was partially degraded to 14CO2. However, the mineralisation rate of about 1 % was of less importance in comparison to the rate on the dry sand. The results indicate that the mineralisation takes place at “active sites” on the surface.Keywords
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