Pumice stone supported titanium dioxide for removal of pathogen in drinking water and recalcitrant in wastewater

Bactericidal and organic degradation effects of TiO2 on pumice stone are described in this paper. Immobilization of TiO2 on pumice stone is easy and efficient method to obtain photocatalytic reactions without the problem of filtration. Pumice stone is soft and available as pellets that can be used in pellets fixed (with cement or poly carbonate) on a slanting plank/glass by coating the preformed TiO2 over the pellets using simple paint brush for applying the photo catalyst. The treatment of inactivation of bacteria especially E coli existing in real river waters and also different model organic substrate degradations like acid orange-7, resorcinol, 4, 6-dinitro-o-cresol, 4-nitrotoluene-2-sulfonicacid, isoproturan are studied. Furthermore, TiO2 over pumice stone loaded in a multi tube reactor gave similar results for the disinfection and detoxification studies. (C) 2008 Elsevier Ltd. All rights reserved.