A NOVEL NON-CONCENTRATING REACTOR FOR SOLAR WATER DETOXIFICATION

摘要

The photocatalytic degradation of organic compounds using titanium dioxide is a promising method for the clean-up of polluted water, especially if the sun is used as the light source. In this paper a novel ?Plexiglas double-skin sheet reactor, able to use diffuse as well as direct sunlight, is introduced. To characterize this novel photochemical re-actor for solar water detoxification, degradation experi-ments were performed using dichloroacetic acid as a model compound and varying the type of catalyst and its concen-tration. Moreover, the content of molecular oxygen of the suspension was varied systematically. Photonic efficien-cies up to 13 % were achieved in these experiments in very good agreement with those of corresponding experiments performed under idealized laboratory conditions. Photoca-talytic detoxification experiments with ground water conta-minated with nitro aromatic compounds from a World War II-ammunition plant proved that this reactor can indeed be employed for the solar detoxification of realistic contami-nated water.