Adsorption of Copper Ions and Methylene Blue on Natural Wheat Straw and Modified Wheat Straw in Single and Binary System: Column Mode

Abstract

Adsorption of copper ion and methylene blue (MB) ion from aqueous solution was performed by natural wheat straw (NWS) and modified wheat straw (MWS) with citric acid (CA) in fixed-bed column. Adsorption behaviors of single system and binary system were compared at same experimental condition. There was higher adsorption capacity of MWS for binding Cu2+ and MB. In the binary system of Cu2+ and MB coexisted in solution, there was competitive adsorption. The adsorption quantity of Cu2+ or MB decreased with MB or Cu2+ existed. NWS and MWS can simultaneously adsorb Cu2+ and MB from mixtures.