Equilibrium constants in the case of Cd(ii) ions.

Sample	Langmuir			Freundlich
	Q m (mg g−1)	P 4 (L mg−1)	R 2	Q m (mg g−1)	P 5 (mg g−1)(L mg−1)1/L	R 2
N1	27.39	0.042	0.947	24.76	7.96	0.845
N2	26.34	0.032	0.976	23.74	5.03	0.972