Removal of Colored Organic Pollutants from Wastewaters by Magnetite/Carbon Nanocomposites: Single and Binary Systems

Table 4

Comparison of experimental and calculated values and rate constants for adsorption of NB, ChS, and BR2 dyes on PM-4 nanocomposites.

Dye	Temp; (°C)	​; (mgg^−1)	First-order; kinetic model			Second-order; kinetic model			Intraparticle; diffusion
			​; (mg·g^−1)	​; (min^−1)		​; (mg·g^−1)	​; (g·mg^−1·min^−1)		​; (mg·g^−1·min^−0.5)
NB	25	89.22	83.27	30.77	0.9851	93.63	5.45	0.9994	9.71	5.40	0.9603
	40	95.84	69.51	38.17	0.9491	102.99	9.57	0.9987	10.07	12.75	0.9435
	60	98.91	59.65	63.56	0.9579	104.28	21.11	0.9996	10.27	33.95	0.9822
ChS	25	79.49	68.06	28.95	0.9753	80.81	7.85	0.9992	5.67	37.15	0.9866
	40	94.77	48.33	25.75	0.9501	100.81	13.78	0.9996	6.79	40.29	0.9629
	60	97.86	28.87	52.97	0.9219	101.21	66.36	0.9999	7.01	58.67	0.9765
BR2	25	96.86	33.78	57.02	0.8747	99.80	39.69	0.9996	17.99	5.58	0.9540
	40	98.84	15.51	49.84	0.6774	100.00	82.24	0.9999	29.17	1.94	0.9845
	60	99.45	8.071	50.36	0.6212	101.21	843.7	0.9999	32.70	4.55	0.9673