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

Table 1

Correlation coefficients (R²) and linear equations of kinetic models for nitrate and phosphate adsorption on ferric oxide-amine material.

Ion	Kinetic model	Linear equation	R^2	Capacity (qe,cal) mg/g
Nitrate	Pseudo-first-order	y = 0.0534x + 2.9705	0.7849	18.73
	Pseudo-second-order	y = 0.0098x + 0.0104	0.9997	102.04
	Intraparticle diffusion	y = 0.1027x + 4.1972	0.8568	—
Phosphate	Pseudo-first-order	y = 0.0461x + 2.8955	0.9156	21.69
	Pseudo-second-order	y = 0.0241x + 0.0646	0.9989	41.49
	Intraparticle diffusion	y = 0.15x + 3.067	0.9232	—