experimental study of cd(ii) ions elimination by bio-nanocomposite hydrogel based on starch-g-poly(acrylic acid) reinforced with cellulose nanofibers in a fixed bed column

In the present study, continuous adsorption of bio-nanocomposite hydrogel for removing cd(ii) ions from aqueous solution using a fixed-bed column was investigated# the bio-nanocomposite hydrogel was synthesized based on starch grafted poly (acrylic acid) (st-g-paa) reinforced by cellulose nanofibers (cnfs)# the effect of operating conditions of ph, initial concentration, and flow rate on process efficiency were investigated by using a three level box-behnken design (bbd) comprising 15 experiments# the gained data was employed to develop a polynomial model to optimize cd(ii) ions removal efficiency# the model specifies, the optimum cd(ii) ions removal efficiency at 82#45%, for operating conditions of ph=5, initial concentration of 10 mg/l, and flow rate of 5 ml/min, while under these conditions the efficiency was measured at 82%#