Comparison of Acid Red 114 Dye Adsorption by Fe₃O₄ and Fe₃O₄ Impregnated Rice Husk Ash

Table 6

Kinetic parameters for the adsorption of AR114 on MNP and RHA-MNP (, 100 mg/L,  g/L, and natural pH).

MNP
Pseudo-first-order model
(mg/L)	(mg/g)	(mg/g)	(min^−1)
60	56.06	6.75	0.0513	0.9178
100	91.81	17.48	0.0842	0.6626
Pseudo-second-order model
(mg/L)	(mg/g)	(g/mg min)	(g/mg min)
60	56.82	78.74	0.024	0.9999
100	92.59	119.05	0.014	0.9999
RHA-MNP
Pseudo-first-order model
(mg/L)	(mg/g)	(mg/g)	(min^−1)
60	55.39	32.58	0.035	0.9921
100	85.54	53.59	0.026	0.9934
Pseudo-second-order model
(mg/L)	(mg/g)	(g/mg min)	(g/mg min)
60	57.47	8.842	0.002	0.9982
100	85.47	10.237	0.001	0.9954