Magnetic Fe₃O₄@Chitosan Carbon Microbeads: Removal of Doxycycline from Aqueous Solutions through a Fixed Bed via Sequential Adsorption and Heterogeneous Fenton-Like Regeneration

Table 1

Parameters of Thomas and Yoon-Nelson models.

(mg/L)	(cm)	(mL/min)	pH	Thomas model			Yoon-Nelson model
				(mL/(min·mg))	(mg/g)		(min^−1)
25	1.2	1.1	11	2.725	5.974	0.994	0.068	55.623	0.994
25	1.2	1.1	9	2.823	4.568	0.982	0.071	42.529	0.982
25	1.2	1.1	7	3.749	3.432	0.984	0.094	32.289	0.984
25	1.2	1.1	4	4.518	2.239	0.977	0.113	20.845	0.977
25	1.2	1.1	2	7.487	0.910	0.962	0.187	8.4716	0.962
20	1.2	1.1	7	4.107	4.168	0.983	0.082	48.139	0.983
25	1.2	1.1	7	3.749	3.432	0.984	0.094	32.289	0.984
30	1.2	1.1	7	2.834	2.168	0.985	0.095	16.806	0.985
25	0.8	1.1	7	4.647	2.487	0.998	0.116	15.286	0.998
25	1.2	1.1	7	3.749	3.432	0.984	0.094	32.289	0.984
25	1.6	1.1	7	2.817	3.538	0.982	0.070	45.545	0.982
25	1.2	1.1	7	3.749	3.432	0.984	0.094	32.289	0.984
25	1.2	2.1	7	4.108	2.959	0.996	0.103	14.429	0.996
25	1.2	3.1	7	5.518	0.840	0.929	0.138	2.775	0.929