Journal of Analytical Science and Technology

Table 4 Thermodynamic parameters for dye adsorption onto P and AP

From: Alginate-coated perlite beads for the efficient removal of methylene blue, malachite green, and methyl violet from aqueous solutions: kinetic, thermodynamic, and equilibrium studies

Adsorbent		ΔS ^o	ΔH ^o	ΔG ^o				R ²
Adsorbent	Dye			T = 298.15 K	T = 308.15 K	T = 318.15 K	T = 328.15 K	R ²
AP	MB	−3.5	−18,427	−17,382	−17,347	− 17,312	− 17,277	0.997
AP	MG	117	17,152	−17,844	−19,017	−20,191	−21,365	0.993
AP	MV	107	12,531	−19,329	−20,397	−21,466	−22,534	0.996
P	MB	−74	−42,143	−20,052	−19,311	−18,570	− 17,829	0.989
P	MG	164	27,277	−21,665	− 23,306	− 24,948	−26,589	0.990
P	MV	116	13,788	−20,782	−21,942	−23,101	−24,261	0.949

Back to article page