Fig. 13From: Simultaneous removals of cadmium(II) ions and reactive yellow 4 dye from aqueous solution by bone meal-derived apatite: kinetics, equilibrium and thermodynamic evaluationsLeast square fit of Qt versus t of kinetic plots for the uptake of Cd(II) ions on BMDA (a) first-order (b) second-order (c) Elovich fits and (d) Intraparticle diffusion models. (Adsorbent dosage: 0.04 g/L, Temp: 30 °C, pH: 4.5 for RY4 dye adsorption)Back to article page