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

Table 5

Thermodynamic parameters for removal of BTEX by TTAB-Mt.

Adsorbate	𝑞𝑒 (mg/g)				Δ𝐺 (kJ/mol)				Δ𝐻	Δ𝑆
	283 K	293 K	303 K	313 K	283 K	293 K	303 K	313 K	(kJ/mol)	(J/mol · K)
Benzene	2.98	3.85	4.46	5.55	−0.35	−1.75	−3.14	−4.53	39.10	139.34
Toluene	4.52	4.88	5.93	6.87	−1.09	−2.21	−3.33	−4.45	30.70	112.24
Ethylbenzene	4.46	5.48	6.36	7.33	−1.42	−2.40	−3.39	−4.37	26.46	98.44
Xylene	5.55	6.28	6.80	7.75	−1.63	−2.63	−3.62	−4.62	26.50	99.35