The Removal of Phenol and Its Derivatives from Aqueous Solutions by Adsorption on Petroleum Asphaltene

Table 4

Adsorption thermodynamic parameters of xylenols adsorption onto asphaltene.

Adsorbate	T (K)	Δ𝐺 (kJ mol^−1)	Δ𝐻 (kJ mol^−1)	Δ𝑆 (J K^−1 mol^−1)	𝑅^2
2,6-Xylenol	278	1.514	13.962	44.777	0.997
	288	1.066
	298	0.618
	308	0.171
2,5-Xylenol	278	7.353	14.004	23.924	0.999
	288	7.114
	298	6.875
	308	6.635