Synthesis of Nanoporous Biochar from Rice Husk for Adsorption of Methylene Blue

Table 3

Thermodynamic parameters of adsorption of methylene blue by KN-AC.

MB concentration (mg/L)	H (kJ/mol)	S (J/mol)	G (kJ/mol)
			298 K		308 K	318 K
150	9.146	58.982	−8.950	−8.589		−8.589
200	4.988	37.413	−5.366	−5.359		−4.716
300	7.483	34.919	−2.898	−2.780		−2.346