Sorption experiment

Effects of contact time on adsorption capacity of Cu(II) onto different adsorbents (adsorbent dosage= 0.5 g, contact time = 5, 10, 15, 25, 35, 50, 65 h, initial Cu(II) concentration = 300 mg L-1, initial solution pH = 5.0 ± 0.1, temperature = 25°C).Plots for the intra-particle diffusion, Pseudo-first-order and Pseudo-second-order sorption kinetics of Cu(II) onto different adsorbents.These data were measured for effect of initial Cu(II) concentration on adsorption capacity of Cu(II) onto different adsorbents (adsorbent dosage= 0.5 g, initial Cu(II) concentration = 10, 50, 100, 300, 500, 700 mg L-1, initial solution pH = 5.0 ± 0.1, contact time = 25 h, temperature = 25°C), and plots for Langmuir and Freundlich isotherms for adsorption of Cu(II) onto different adsorbents (The legends of “Freundlich” are the same with that of “Langmuir”).Thermodynamic parameters for the adsorption of Cu(II) onto different adsorbents.