Fig. 7

Study the effect of a contact time (pH = 7, polymer dose = 0.1 g, initial Cd²⁺ concentration = 20 ppm, T = 293.15 K); b pH (polymer dose = 0.1 g, initial Cd²⁺ concentration = 20 ppm, contact time = 60, T = 293.15 K); c polymer dose (initial Cd²⁺concentration = 20 ppm, T = 293.15 K, contact time = 60 min, pH = 7); and d initial Cd²⁺ concentration (pH = 7, polymer dose = 0.1 g, contact time = 60 min, T = 293.15 K) on Cd²⁺ adsorption efficiency of PAP_h, and PAP_D