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

Figure 4

Langmuir isotherm model for adsorption of (a) Pb²⁺ and (b) Cd²⁺ on hybrid fibers with different HAp/chitosan ratio (10/90 (square), 20/80 (circle), and 30/70 (triangle)).

(a)

(b)