FRESENIUS ENVIRONMENTAL BULLETIN, vol.27, no.7, pp.5001-5007, 2018 (SCI-Expanded)
In the present paper, Reactive Yellow 15 removal from aqueous solution by heterogeneous fen ton oxidation was investigated using 23 full factorial design. Fenton oxidation was conducted using a Fe/CuO catalyst in the presence of hydrogen peroxide (H2O2) in a batch process. The effects of pH of the reaction, catalyst concentration and reaction time were examined under the following conditions: 30 degrees C of temperature, 50 ppm initial dye concentration, 8% Fe and 50 mM H2O2 concentration. The factors used in experiments and their levels have been determined as follows: initial pH: (2.0 and 8.0) Catalyst amount: (0.025g/25 ml and 0.1g/25 ml) and reaction time (10 and 60 minutes). The significance of effects has been statistically identified through ANOVA (variance analysis) within the confidence interval of 95% (statistical software, Minitab-18). When the effects of main factor are analysed, ANOVA results have indicated that time has the highest critical effect. While pH has had a negative effect, catalyst amount has had a positive effect. When the dual interactions are analysed, it has been observed that time-pH interaction has had the highest effect. A maximum colour removal was achieved as 97.6% at a low initial pH (2), high catalyst amount (0.1g), and high time (60 min) in a significance level of 5%.