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

Figure 9

Pseudo-second-order kinetic model for adsorption of Pb²⁺ and Cd²⁺ by the HAp/chitosan hybrid fibers: (a) and (b) 10/90, (c) and (d) 20/80 HAp/chitosan hybrid fibers.

(a) Pb²⁺

(b) Cd²⁺

(c) Pb²⁺

(d) Cd²⁺