Multi-Component Adsorption of Benzene, Toluene, Ethylbenzene, and Xylene from Aqueous Solutions by Montmorillonite Modified with Tetradecyl Trimethyl Ammonium Bromide

Table 4

Parameters for Langmuir, Freundlich, and 𝐷-𝑅 isotherm models for adsorption of BTEX by TTAB-Mt.

Adsorbate	Langmuir isotherm			Freundlich isotherm			𝐷-𝑅 isotherm
	𝑄𝑚 (mg/g)	b (L/mg)	𝑅^2	𝐾𝑓	𝑛	𝑅^2	𝑞𝑚 (mg/g)	𝐸 (kJ/mol)	𝑅^2
Benzene	3.61	0.049	0.971	0.041	1.55	0.996	3.22	0.147	0.949
Toluene	5.52	0.083	0.940	0.068	1.24	0.991	4.04	0.240	0.866
Ethylbenzene	6.90	0.201	0.986	0.160	1.08	0.998	5.82	0.331	0.896
Xylene	8.26	0.126	0.847	0.066	1.04	0.992	6.67	0.304	0.881