The heterogeneous photocatalytic degradation, intermediates and mineralization for the aqueous solution of cresols and nitrophenols

摘要

This investigation was initiated to study the heterogeneous photocatalytic reactions of cresols and nitrophenols with ultraviolet light/titanium dioxide (UV/TiO_2) system. The experimental parts consisted of pH effect, determination of intermediates and mineralization. At pH 7 and a concentration of 0.1 mM, cresols and nitrophenols nearly disappeared after 2.5 h of reaction time. Under various pH levels, the pseudo first order rate constants of Langmuiir-Hinshelwood model Was found satisfactory.