The Color Removal of Dye-Containing Wastewater by Cerium (IV) Sulfate from Aqueous Solutions

Abstract

In this study a giant reagent such as Ce (SO4 )2 was used for removing different initial dye concentration (10-1000 mg/l) of reactive red 31 (R.R31) less than two minutes in a laboratory scale whereas the percent of dye removal efficiency was %99.9. The Langmuir, Freundlich and Tempkin adsorption models were applied to describe the equilibrium isotherms. The Langmuir model agreed very well with experimental data (R2 > 0.99). The kinetics of adsorption was evaluated by the pseudo first-order, second-order and intra particle models. The data agreed well with the pseudo first-order kinetic model. These results demonstrated that Ce (SO4 )2 is an efficient reagent for removal of R.R 31 from aqueous solutions.