A STUDY ON ACTIVATION PROCESS OF RED MUD 1 TO USE AS AN ARSENIC ADSORBENT

Abstract

Red mud, an industrial waste from the alumina-producing Bayer process, releases a huge amount quantity in the world and becomes an important pollution resource. The aim of this study is to evaluate the effect of activation conditions on the properties of the treated red mud to use as an Arsenic adsorbent. Five parameters of the activation process including calcination temperature, calcination time, acid concentration, reaction temperature, and reaction time were studied using Response Surface Methodology. The optimum conditions were obtained at calcination temperature of 274.42°C in 3.04 hours and activating concentration of H2SO4 is 1.18M at 87.88°C in 3.93 hours. The As5+ adsorption ability from simulated solutions was conducted to test effect of activating parameters.