%0 Journal Article
%T Statistical Evaluation of UV/TiO2/H2O2 and Fe2+/H2O2 Process for the Treatment of Coloured Wastewater; A Comparative Study
%A Gr£¿i£¿
%A I.
%A Koprivanac
%A N.
%A Vujevi£¿
%A D.
%J -
%D 2010
%X Sa£¿etak In this work, two types of advanced oxidation processes; photocatalytic oxidation, UV/TiO2/H2O2 and classic Fenton oxidation, Fe2+/H2O2, have been applied for the treatment of a model wastewater containing reactive azo dyes, C.I. Reactive Violet 2 (RV2) and C.I. Reactive Yellow 3 (RY3). In order to evaluate the effect of the initial concentration of catalysts, ¦Ã(TiO2) or [Fe2+], initial concentration of oxidant, [H2O2] or the initial oxidant/catalyst mole ratio [H2O2]/[Fe2+] and pH on apparent mineralization and decolourization rates, a response surface method (RSM) D-optimal design was used. Mineralization was described by pseudo-first-order kinetics with the highest observed rate constants; km,UV = 0.0065 min¨C1 in the case of UV/TiO2/H2O2 process and km,F = 0.0213 min¨C1 in the case of Fenton process. A kinetic model describing decolourization on wavelengths of maximum absorbance for studied dyes, ¦ËmaxRV2 550 nm, and ¦ËmaxRY3 385 nm, was composed of two first-order in-series reactions with corresponding decolourization rates. The effects of each factor on the efficiency of the applied processes were found to be significant
%K Wastewater treatment
%K reactive azo dyes
%K photocatalytic oxidation
%K Fenton oxidation
%K response surface method (RSM)
%K D-optimal design
%U https://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=93934