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

Table 2

Kinetic constants for adsorption studies.

T (˚C)	Pseudo-first-order			Pseudo-second-order			Intraparticle diffusion			Bangham			Elovich
	K1(Lg^−1min^−1)	qe(mg g^−1)	R^2	K2(gmin^−1L^−1)	qe(mgg^−1)	R^2	Kp(mg g^−1min^−0.5)	C	R^2	Kr(mgg^−1min^−1)	M	R^2	α(mg g^−1min^−1)	Β	R^2
CR Dye
25	0.156	1.421	0.933	0.026	8.130	0.991	0.211	5.180	0.886	1.93	12.19	0.843	157.24	1.572	0.825
35	0.066	1.558	0.928	0.024	8.196	0.994	0.214	5.740	0.880	2.036	12.50	0.811	1222.4	1.540	0.804
45	0.029	1.569	0.790	0.022	8.928	0.997	0.217	6.517	0.906	2.15	11.36	0.844	3321.5	1.485	0.844
55	0.027	1.958	0.799	0.017	9.174	0.998	0.250	6.770	0.901	2.185	9.17	0.878	3330	1.319	0.875
SF Dye
25	0.092	0.785	0.881	0.076	3.521	0.878	0.051	2.206	0.969	1.289	18.18	0.953	25.929	4.672	0.946
35	0.062	1.150	0.927	0.028	4.115	0.999	0.088	2.659	0.965	1.386	15.38	0.948	31.186	2.865	0.946
45	0.041	1.196	0.983	0.026	4.310	0.999	0.101	2.845	0.876	1.485	8.47	0.951	45.451	2.469	0.949
55	0.039	1.740	0.968	0.005	7.812	0.999	0.102	6.339	0.934	2.129	8.33	0.976	108.41	2.415	0.978