Minimization of organic content in simulated industrial wastewater by Fenton type processes: a case study.
Pre-treatment of simulated industrial wastewaters (SIM1, SIM2 and SIM3) containing organic and inorganic compounds (1,2-dichloroethane, sodium formate, sodium hydrogen carbonate, sodium carbonate and sodium chloride) by oxidative degradation using homogeneous Fenton type processes (Fe2+/H2O2 and Fe3+/H2O2) has been evaluated. The effects of initial Fe2+ and Fe3+ concentrations, [Fe2+/3+], type of iron salt (ferrous sulfate vs. ferric chloride), initial hydrogen peroxide concentration, [H2O2], on mineralization extent, i.e., total organic content (TOC) removal, were studied. Response surface methodology (RSM), particularly Box-Behnken design (BBD) was used as modelling tool, and obtained predictive function was used to optimize the overall process by the means of desirability function approach (DFA). Up to 94% of initial TOC was removed after 120 min. Ferrous sulfate was found to be the most appropriate reagent, and the optimal doses of Fe2+ and H2O2 for reducing the pollutant content, in terms of final TOC and sludge production were assessed.
Grcić
Ivana
I
Department of Polymer Engineering and Organic Chemical Technology, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, HR-10000 Zagreb, Croatia.
Vujević
Dinko
D
Sepcić
Josip
J
Koprivanac
Natalija
N
D000395:Air Pollutants, Occupational / Q000032:analysis* / Q000302:isolation & purification; D000465:Algorithms; D000704:Analysis of Variance; D006861:Hydrogen Peroxide / Q000737:chemistry; D007202:Indicators and Reagents; D007220:Industrial Waste / Q000032:analysis*; D007501:Iron / Q000737:chemistry; D058085:Iron Compounds / Q000737:chemistry; D009930:Organic Chemicals / Q000032:analysis*; D010084:Oxidation-Reduction; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D014865:Waste Disposal, Fluid / Q000379:methods*
D000395:Air Pollutants, Occupational; C045076:Fenton's reagent; D007202:Indicators and Reagents; D007220:Industrial Waste; D058085:Iron Compounds; D009930:Organic Chemicals; D006861:Hydrogen Peroxide; D007501:Iron