Application of central composite design for the optimization of photodestruction of a textile dye using UV/S2O82- process

作者：Khataee A R^*

来源：Polish Journal of Chemical Technology, 2009, 11(4): 38-45.

DOI：10.2478/v10026-009-0041-y

• Experimental design
• Response surface methodology
• Decolorization
• CI Basic Red 46
• K2S2O8

The photooxidative destruction of C.I. Basic Red 46 (BR46) by UV/S2O82- process is presented. Central Composite Design (CCD) was employed to optimize the effects of operational parameters on the photooxidative destruction efficiency. The variables investigated were the initial dye and S2O82- concentrations, reaction time and distance of the solution from UV lamp. The predicted values of the photodestruction efficiency were found to be in good agreement with the experimental values (R-2 = 0.9810, Adjusted R-2 = 0.9643). The results of the optimization predicted by the model showed that the maximum decolorization efficiency (>98%) was achieved at the optimum conditions of the reaction time 10 min, initial dye concentration 10 mg/l, initial peroxydisulfate concentration 1.5 mmol/l and distance of UV lamp from the solution 6 cm. The figure-of-merit electrical energy per order (E-Eo) was employed to estimate the electrical energy consumption and related treatment costs.

• 出版日期2009