. 2022 May 27;10(6):291. doi: 10.3390/toxics10060291

Table 1.

Isotherm parameters of CrO₄²⁻ and Pb²⁺ onto synthetic allophane derived from Langmuir and Freundlich models.

Models	Parameters	Allophane-Cr	Allophane-Pb
Langmuir	$Q_{m}$ (mg/g)	8.09	88.08
	$K_{l}$ (L/mg)	0.01	0.03
	R²	0.920	0.770
Freundlich	$Q_{m}$ (mg/g)	0.24	34.91
	$K_{l}$ (L/mg)	1.56	9.40
	R²	0.959	0.942