Dissolution and Solubility Product of Cd-Fluorapatite [Cd₅(PO₄)₃F] at pH of 2–9 and 25–45°C

Figure 4

Aqueous evolution during the dissolution of the synthetic cadmium fluorapatite [Cd₅(PO₄)₃F] at 25–45°C for 7200 h. (a) 25°C and pH = 2; (b) 35°C and pH = 2; (c) 45°C and pH = 2; (d) 25°C and pH = 5.6; (e) 25°C and pH = 9; (f) Cd/P ratio.

(a)

(b)

(c)

(d)

(e)

(f)