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

Figure 3

Removal characteristics of Pb²⁺ and Cd²⁺ by the HAp/chitosan hybrid fibers with different HAp contents according to initial concentration and reaction time: (a) and (b) 10/90, (c) and (d) 20/80, and (e) and (f) 30/70 HAp/chitosan hybrid fibers.

(a) Pb²⁺

(b) Cd²⁺

(c) Pb²⁺

(d) Cd²⁺

(e) Pb²⁺

(f) Cd²⁺