Preparation, Characterization, and Application of Novel Ferric Oxide-Amine Material for Removal of Nitrate and Phosphate in Water

Table 4

Thermodynamic parameters of nitrate and phosphate adsorption onto ferric oxide-amine material at different temperatures.

Thermodynamic parameter	Temperature (K)	Nitrate	Phosphate
∆G (kJ/mol)	293	−0.01	−3.84
	303	−0.08	−3.4
	318	−0.19	−2.74
∆H (kJ/mol)	—	2.13	−16.75
∆S (kJ/mol.K)	—	0.007	−0.04