Evaluation of Activated Carbons Prepared from Bioprecursors for the Removal of Cadmium and Chromium (VI)

Table 3

Langmuir and Freundlich isotherms for adsorption of Cd and Cr(VI) on CA1 and CA2.

Adsorbent	Element	Langmuir			Freundlich
		qmax (mg/g)	KL		KF	1/n
CA1	Cd	23.256	0.051	0.904	1.211	0.868	0.937
	Cr(VI)	17.857	0.039	0.992	1.096	0.652	0.997
CA2	Cd	8.849	0.047	0.984	1.032	0.482	0.995
	Cr(VI)	10.526	0.029	0.946	1.640	0.612	0.967

q_max: maximum adsorption capacity; K_L: Langmuir constant; K_F: Freundlich constant; 1/n: coefficient of the Freundlich equation; : correlation coefficient.