The Improvement of Natural Thai Bentonite Modified with Cationic Surfactants on Hexavalent Chromium Adsorption from an Aqueous Solution

Table 4

Parameters of the thermodynamic adsorption analysis.

Adsorbent	T (K)	Kc	ΔG^0 (kJ mol^-1)	ΔH^0 (kJ mol^-1)	ΔS^0 (J K^-1 mol^-1)
1CPC	298	3.31	-2.97	3.93	23.05
	303	3.29	-3.00
	308	3.49	-3.20
	313	3.54	-3.29
1HDTMA	298	3.38	-3.02	1.19	14.02
	303	3.34	-3.04
	308	3.38	-3.12
	313	3.45	-3.22