Evaluation of electrical energy per order (E EO) with kinetic modeling on the removal of Malachite Green by US/UV/H2O2 process

Abstract: The kinetics of decolorization of Malachite Green (MG) as a model cationic dye from textile industry, by US/UV/H2O2 process, was investigated with nonlinear regression analysis. The experimental results indicated that the decolorization kinetics of MG in this process fit well by pseudo-first order kinetics. With nonlinear regression analysis a model was developed for pseudo-first order constant (k ap) as a function of operational parameters such as initial concentrations of H2O2 (25–600mgl−1) and MG (1.82–9.87mgl−1), temperature (294–307K) and power density (0.049–0.16Wml−1) as following: For electrical energy cost evaluation, the figure-of-merit electrical energy per order (E EO) was estimated from experimental and theoretical data. The results show that E EO is very sensitive to the mentioned operational parameters. [Copyright &y& Elsevier]