Fabrication of Porous Hydroxyapatite Granules as an Effective Adsorbent for the Removal of Aqueous Pb(II) Ions

Table 4

The values of ln C_e, ln Q, and C_e/Q ratio determined from the different initial concentrations of Pb²⁺.

C0 (mg/L)	Ce (mg/L)	ln Ce	Q (mg/g)	ln Q	Ce/Q (g/L)
30	0.32	−1.13	4.95	1.60	0.06
40	0.97	−0.03	6.50	1.90	0.15
50	2.34	0.85	7.94	2.07	0.30
60	2.7	0.99	9.49	2.25	0.28
80	7.35	2.00	12.10	2.49	0.57
100	17.35	2.85	13.77	2.62	1.26