Study on using modified laterite in the heterogeneous Fenton process for removing dye compound

Abstract

In this work, laterite was modified by iron (III) sulfate (Lat-Fe), and it was used in heterogeneous Fenton for the removal of Reactive Yellow 160 dye (RY 160). Properties of chemical composition, surface morphology and specific surface area of modified laterite were characterized by Energy dispersive X-ray spectroscopy (EDX), scanning electron microscopes (SEM) and BET method and that laterite was assessed effectively to apply in the heterogeneous Fenton process. Experimental investigations about conditions such as pH, H2O2 oncentration, and modified materials were conducted to look for the suitable conditions for removing dye compound by Fenton process. Studied results showed that modified laterite by procedure without iron Fe3+ had not catalyzed activation in Fenton process. However, using modified laterite by iron (III) sulfate (Lat-Fe) get good results in the heterogeneous Fenton process for removing Reactive Yellow 160 dye. Removing Reactive
Yellow 160 dye (RY 160) with initial concentration of 50ppm with investigated optimal conditions of Lat-Fe: 1,25g/L, H2O2 2,45 mM, pH 7 at 30oC get 70% of removal efficiency in 120 minutes.