Table 2.

Isotherm constants of Pb(II) adsorbed onto ZnO-Nano-A.

Langmuir Isotherm				Freundlich Isotherm
Temp (°C)	Qm (mg g−1)	B (L mg−1)	R2	KF (mg g−1)	n	R2
30	15.65	5.93 × 10−2	0.988	1.98	2.34	0.929
50	17.84	7.37 × 10−2	0.999	2.94	2.54	0.961
70	19.65	8.39 × 10−2	0.999	3.16	2.81	0.914