Removal of Cadmium and Lead from Aqueous Solution by Hydroxyapatite/Chitosan Hybrid Fibrous Sorbent: Kinetics and Equilibrium Studies

Figure 7

Pseudo-second-order kinetic model for adsorption of (a) Pb²⁺ and (b) Cd²⁺ on 30/70 HAp/chitosan hybrid fibers at initial metal ion concentration of 10 mg/L (square), 100 mg/L (circle), and 1000 mg/L (triangle).

(a)

(b)