Naslov
Modeling of iron activated persulfate oxidation treating reactive azo dye in water matrix

Autori
Kušić, Hrvoje ; Peternel, Igor ; Ukić, Šime ; Koprivanac, Natalija ; Bolanča, Tomislav ; Papić, Sanja ; Lončarić Božić, Ana

Izvornik
Chemical engineering journal (1385-8947) 172 (2011), 1; 109-121

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
wastewater treatment ; iron ; persulfate ; UV irradiation ; dye pollutant ; kinetic modeling

Sažetak
Advanced oxidation processes (AOPs) offer effective solutions for the treatment of wastewaters containing hazardous and refractory organic pollutants. However, their efficiency is strongly influenced by varying process conditions thus the prediction of the system behavior is of an unappreciable interest. In this study iron activated persulfate oxidation was applied for degradation of reactive azo dye, C.I. Reactive Red 45 (RR45), in water matrix. Fe2+/S2O82- and Fe0/S2O82- processes were maintained in a dark as well as with UV light assistance. The main purpose was to develop the flexible mathematical/mechanistic model (MM) which would (i) predict not only the conversion of parent pollutant, i.e. decolorization of model dye solution, but also the mineralization of model pollutant, and (ii) could keep the predictive power regardless the process operating conditions. Hence, the pH dependent mechanism describing both organic and inorganic ferric complexes formation as one of the major limitations of iron activated processes, as well as iron activated persulfate oxidation, was built in the model. Developed MM showed a high accuracy in predicting the degradation of RR45 considering both decolorization and mineralization, as well as the profiles of iron species, persulfate decomposition, the subsequent formation of sulfates and pH changes during the treatment. Good agreement of the data predicted and the empirically obtained was confirmed by calculated root mean square deviation (RMSD) values.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Interdisciplinarne tehničke znanosti

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