Comparative and Equilibrium Studies on Anionic and Cationic Dyes Removal by Nano-Alumina-Doped Catechol Formaldehyde Composite

Table 1

Isotherm constants.

T (°C)	Langmuir			Freundlich			Temkin
	qm(mg/g)	Kl (L/mg)	R^2	Kf (L/g)	nf	R^2	bT	AT	R^2
CR dye
25	7.812	1.702	0.917	1.135	0.987	0.972	6254.56	1.199	0.735
35	7.936	2.56	0.975	1.154	1.037	0.981	6265.05	0.161	0.776
45	8.403	2.975	0.984	1.328	1.605	0.986	6417.82	0.074	0.827
55	8.928	3.294	0.958	1.362	1.808	0.994	7417.88	0.034	0.923
SF dye
25	2.571	0.380	0.932	0.726	0.077	0.927	1092.245	0.5431	0.945
35	3.172	0.507	0.857	0.729	1.264	0.979	1098.70	0.5184	0.752
45	3.547	0.517	0.890	0.811	1.358	0.919	1279.076	0.4924	0.896
55	6.534	0.972	0.890	1.080	1.449	0.935	1318.629	0.4391	0.937