Naslov
Iron activated persulfate oxidation of an azo dye in model wastewater : the influence of iron activator type and processes optimization

Autori
Kušić, Hrvoje ; Peternel, Igor ; Koprivanac, Natalija ; Lončarić Božić, Ana

Izvornik
Journal of environmental engineering (New York, N.Y.) (0733-9372) 137 (2011), 6; 454-463

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

Ključne riječi
dye wastewater; AOP; persulfate oxidation; iron activator; process parameters; response surface methodology

Sažetak
The study explores the potential of iron activated persulfate oxidation of an azo dye in model wastewater. The influence of the type of iron activator, ferrous and zero valent iron, on process efficiency was investigated. The Box-Behnken experimental design and response surface methodology were applied for the modeling of Fe2+/S2O82- and Fe0/S2O82- processes. The combined effect of three important process parameters was investigated and presented by the means of quadratic polynomial model. The statistical analysis of model performance was evaluated by ANOVA (analysis of variance). The optimal process conditions giving the maximal mineralization for both processes were determined: pH 4.81, [Fe2+]=1.64 mM and [S2O82-]=84.87 mM predicting 35.14 % mineralization and pH 5.52, [Fe0]=4.27 mM and [S2O82-]=138.43 mM predicting 54.38 % mineralization by Fe2+/S2O82- and Fe0/S2O82- processes, respectively. The predicted values of dye mineralization obtained by model equations were in a good agreement with the experimental values. It was demonstrated that the type of iron activator significantly influence on both process efficiency and optimal conditions determined.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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