Photocatalytic mineralisation of perchloroethylene using titanium dioxide

1 January 1995

journal article
Published by IWA Publishing in Water Science & Technology

Vol. 31 (9)
https://doi.org/10.1016/0273-1223(95)00405-c

Abstract

The photocatalytic mineralisation of perchloroethylene (PCE) is demonstrated mainly in terms of CO₂ formation to investigate the effects of various factors such as dissolved oxygen (DO), titanium dioxide semiconductor (Ti0₂) catalyst dosage, PCE concentration and pH on PCE photocatalysis. PCE was rapidly adsorbed onto the TiO₂ particles followed by its gradual degradation, and CO₂ production started after a short lag time that corresponded to the adsorption phase. The rate of CO₂ formation increased with increasing DO, TiO₂ dosage and PCE concentration. There was no significant effect of initial pH on the CO₂ production rate over a wide pH range. The dependence of the CO₂ formation on PCE concentration was found to obey the Langmuir-Hinshelwood model. No intermediates were detected during PCE degradation and PCE degradation followed a first-order reaction.

Keywords

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