Adsorptive removal of Congo red from aqueous solution using a chitosan-g-poly (acrylic acid-co-itaconic acid) hydrogel: equilibrium, kinetics and thermodynamics
Textile effluent carrying Congo red (CR) is hard to treat, because the dye is highly soluble, chemically stable and toxic at low concentration. Here a hydrogel was prepared by graft copolymerising acrylic acid (AA) and itaconic acid (IA) onto chitosan, giving CH-g-poly(AA-co-IA), with potassium persulfate as initiator...