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

Table 2

The isotherm parameters of nitrate and phosphate adsorption onto ferric oxide-amine material.

Isotherm	Parameter	Temperature (°C)
		20	30	45
Nitrate
Langmuir	Qmax (mg/g)	357.4	400.00	476.19
	KL (L/mg)	0.0044	0.0041	0.0030
	R^2	0.9974	0.9936	0.9967
Freundlich	Kf ((mg/g) (L/mg)^n)	0.0752	0.0542	0.1035
	n	2.3020	2.5075	1.9720
	R^2	0.9630	0.9866	0.9612
Phosphate
Langmuir	Qmax (mg/g)	270.27	217.39	312.50
	KL (L/mg)	0.0679	0.0679	0.0087
	R^2	0.8123	0.9982	0.9386
Freundlich	Kf ((mg/g) (L/mg)^n)	0.3693	0.0491	0.3204
	n	1.1939	2.2227	1.2288
	R^2	0.8669	0.9381	0.9528