Fe78Si9B13 amorphous alloys for the decolorization process of azo dye aqueous solutions with different initial concentrations at different reaction temperatures

Abstract

In this paper, amorphous Fe78Si9B13 ribbons were used to decolorize Acid Orange Ⅱ solutions with different initial concentrations at different temperatures. The effects of reaction temperature on the decolorization process were investigated, and the activation energies for the decolorization reaction in the temperature range of 25°C–50 °C were obtained based on the Arrhenius equation. It was found that the reaction temperature had different influence rules for dye solutions with different initial concentrations, and that the activation energies were significantly different for different initial concentrations. Higher temperatures were conducive to the decolorization of dye solutions especially high-concentration dye solutions, and low-concentration dye solutions generally required lower activation energies for the decolorization reaction. Our work provides experimental support for adjusting technical parameters in the remediation of dye wastewater to enhance the decolorization efficiency.