Table 3.

Sorption parameters and selected figures of merit of the two applied models, for the adsorption isotherms of the contaminants onto the Mt.

		Langmuir ${\mathit{C}}_{\mathit{s}}=\raisebox{1ex}{${\mathit{q}}^{\mathit{m}}{\mathit{K}}_{\mathit{L}}{\mathit{C}}_{\mathit{e}}$}\!\left/ \!\raisebox{-1ex}{$\mathbf{1}+{\mathit{K}}_{\mathit{L}}{\mathit{C}}_{\mathit{e}}$}\right.$
		qm, g g−1	KL, dm3 g−1	R2	χ2	ESS
CV	pH 3.0	0.155 ± 0.007	480 ± 60	0.969	6.0 × 10−5	1.3 × 10−3
	pH 7.0	0.22 ± 0.02	430 ± 70	0.961	8.8 × 10−5	1.0 × 10−3
Ce(III)	pH 7.0	0.122 ± 0.004	180 ± 20	0.984	1.0 × 10−5	9.2 × 10−5
		Freundlich ${\mathit{C}}_{\mathit{s}}={\mathit{K}}_{\mathit{F}}{\mathit{C}}_{\mathit{e}}^{\mathbf{1}/\mathit{n}}$
		n	KF, (g g−1) (dm3 g−1)1/n	R2	χ2	ESS
CV	pH 3.0	2.2 ± 0.1	1.1 ± 0.1	0.985	2.9 × 10−5	6.3 × 10−4
	pH 7.0	2.0 ± 0.1	2.3 ± 0.4	0.967	7.4 × 10−5	8.8 × 10−4
Ce(III)	pH 7.0	2.5 ± 0.3	0.5 ± 0.1	0.923	5.0 × 10−5	4.5 × 10−4