STUDY ON ADSORPTION OF Mn(II) IN WATER USING GRAPHENE/RED MUD MATERIAL

Abstract

This study aimed to remove Mn(II) from water using graphene/red mud material (GR) as an adsorbent. The adsorption of Mn(II) in water using GR material was investigated by batch adsorption experiments at room temperature. The effect of factors such as pH (2 – 12), contact time (30 – 180 min), and initial concentration of Mn(II) (5, 10, 15, 25, 50, 75, 100, and 150 mg/L) on the Mn(II) removal efficiency by GR material were investigated. Results showed that the time to reach adsorption equilibrium and the optimal pH value for adsorption of Mn(II) are 120 min and pH 10, respectively. The maximum monolayer adsorption capacity of GR calculated from Langmuir isotherms was found to be 33.67 mg/g and experimental adsorption capacity was found to be 33.12 mg/g at optimum conditons. The removal of Mn(II) in groundwater, sample was also tested and result showed nearly 90% removal efficiency. Therefore, GR acts as a promising adsorbent for the removal of heavy metals ion from wastewater.