Adsorptive Removal of Acid Blue 80 Dye from Aqueous Solutions by Cu-TiO₂

Table 3

Effect of the initial AB80 concentration on the kinetics parameters of the models for AB80 adsorption onto Cu-TiO₂.

(a)

mg L^−1	mg g^−1	min	Elovich					Fractional power
			mg g^−1 min^−1	g mg^−1		SSE	RMSE	mg min^−1	min^−1		SSE	RMSE
10	3.395	21	0.803 ± 0.290	1.310 ± 0.170	0.978	0.320	0.146	1.010 ± 0.20	0.277 ± 0.053	0.95	0.752	0.224
20	7.725	21	11.50 ± 6.260	0.850 ± 0.098	0.983	1.063	0.250	3.610 ± 0.40	0.175 ± 0.029	0.96	2.087	0.350
30	11.60	21	2.842 ± 1.320	0.380 ± 0.063	0.957	8.664	0.675	3.590 ± 0.84	0.269 ± 0.061	0.91	17.86	0.969
40	12.67	24	8.587 ± 5.740	0.435 ± 0.074	0.953	9.929	0.722	5.330 ± 0.97	0.204 ± 0.048	0.92	16.76	0.939
50	14.00	27	21.43 ± 20.30	0.473 ± 0.090	0.946	12.46	0.809	6.740 ± 1.13	0.168 ± 0.045	0.91	18.77	0.994
70	17.06	30	47.79 ± 46.21	0.468 ± 0.813	0.963	10.26	0.735	8.280 ± 1.08	0.149 ± 0.035	0.94	15.55	0.905
90	18.46	30	32.61 ± 36.42	0.356 ± 0.803	0.932	29.03	1.236	9.340 ± 1.60	0.163 ± 0.048	0.90	41.34	1.475
120	18.71	40	77.24 ± 117.1	0.422 ± 0.107	0.927	27.62	1.206	10.10 ± 1.64	0.139 ± 0.005	0.90	35.94	1.375
150	19.43	40	74.65 ± 92.25	0.412 ± 0.080	0.949	19.56	1.015	10.14 ± 1.40	0.142 ± 0.039	0.93	26.95	1.191

(b)

mg L^−1]	Pseudo-first-order					Pseudo-second-order
	min^−1	mg g^−1		SSE	RMSE	g mg^−1 min^−1	mg g^−1	mg g^−1 min^−1		SSE	RMSE
10	0.071 ± 0.012	3.278 ± 0.154	0.971	0.425	0.168	0.028 ± 0.004	3.782 ± 0.13	0.400	0.991	0.135	0.09
20	0.135 ± 0.135	7.305 ± 0.306	0.944	3.622	0.462	0.022 ± 0.004	8.016 ± 0.19	1.414	0.990	0.630	0.19
30	0.076 ± 0.005	11.19 ± 0.210	0.993	1.269	1.384	0.015 ± 0.002	12.74 ± 0.25	2.435	0.996	0.296	0.47
40	0.105 ± 0.093	12.39 ± 0.280	0.984	2.424	3.411	0.014± 0.0004	13.83 ± 0.31	2.678	0.992	1.661	0.29
50	0.134 ± 0.013	13.32 ± 0.250	0.987	1.403	3.080	0.012 ± 0.002	14.91 ± 0.23	2.668	0.995	1.153	0.24
70	0.165 ± 0.330	14.97 ± 0.022	0.976	6.476	0.584	0.012 ± 1.000	17.71 ± 0.23	3.763	0.997	1.141	0.25
90	0.145 ± 0.012	17.99 ± 0.270	0.990	4.029	0.461	0.011 ± 0.002	19.72 ± 0.41	4.278	0.994	3.708	0.44
120	0.177 ± 0.017	17.47 ± 0.270	0.989	4.235	0.472	0.011 ± 0.002	19.80 ± 0.37	4.312	0.994	3.499	0.43
150	0.175 ± 0.022	17.74 ± 0.360	0.980	7.540	0.630	0.011 ± 0.001	19.83 ± 0.30	4.326	0.995	2.171	0.33