Synthesis and Characterization of Hydroxyapatite- (HAP-) Clay Composites and Adsorption Studies on Methylene Blue for Water Treatment

Table 5

Thermodynamical parameters for MB adsorption onto HAP:BENT (24 mg) adsorbent.

Temperature, T (K)	KL (L/mg)	KL^o (dimensionless)	Ln KL^o	∆G^o (kJ/mol)	∆H^o (kJ/mol)	∆S^o (J/K/mol)
308.15	297.80	95240.36	11.46	−29.37	−31.76	8.30
318.15	163.84	52405.53	10.87	−28.74	—	—
328.15	140.51	44941.89	10.71	−29.23	—	—