Response surface methodological approach and the kinetic study for the assessment of the photodegradation of a pulp mill effluent with H 2O2/Fe(III)/solar UV

As an advanced oxidation treatment, the Fe(III)/H2O2/ Solar-UV process was applied to a pulp mill industry wastewater in Izmir, Turkey. A solar photocatalytic reactor was used for the advanced oxidation. The Box-Wilson experimental design method was employed to optimize the oxidant and catalyst concentrations and circulation velocities of wastewater as significant factors for maximum the TOC., color and AOX removals. By testing different kinetic models to the data of decolorizations, it was found that solar photocatalytic oxidation of pulp mill effluent best fitted pseudo-first-order kinetics and the maximum ktruevalue was 1.89 min-1 with respect to color concentration. The maximum color, TOC and AOX removal efficiencies were 89%, 89% and 100% were achieved, respectively with the addition of 79mM H2O2, 0.6mM Fe(III) and at a 10L/h circulation velocity after 8 hours of the solar oxidation. © by PSP