Utilization of Ground Rice as Eco-Friendly Adsorbent to Remove Malachite Green from Wastewater

Abstract

This study aims to utilize eco-friendly materials for the removal of toxic dyes from wastewater, specifically using ground rice (GR) to adsorption of malachite green (MG) dye. The results of calculating the ideal weight for adsorption of (MG) showed that the best weight for dye removal was (0.4) g by removal ratio (93.34%) and the maximum adsorption capacity at (25) min. When studying the kinetics and adsorption isotherms for three temperatures (293,313,333) K it was found that the pseudo-second-order (PSO) and Freundlich and Temkin isotherm models were applicable. The results of calculating the thermodynamic functions showed that the reaction is exothermic, physical nature, regular in addition to occurring spontaneously. These results provide an accurate description of the quality of the GR for the removal of MG dye, which highlights the possibility of using GR and improving it for wastewater treatment.