Phenol Red Adsorption from Aqueous Solution on the Modified Bentonite

Table 2

Parameters of pseudo-first-order and pseudo-second-order kinetic model of phenol red adsorption by CB, AlCB, and FeCB at different temperatures.

Adsorbents	T (K)	qe (experimental) (mg·g^−1)	First-order kinetic model			Second-order kinetic model
			k1 (min^−1)	qe (cal) (mg·g^−1)	R^2	k2 (g·mg^−1·min^−1)	qe (cal) (mg·g−1)	R^2
CB	293	112.53	0.062	112.62	0.994	0.778. 10^−3	132.86	0.999
	303	114.38	0.082	136.32	0.987	0.925.10^−3	140.86	0.997
	313	114.65	0.073	67.97	0.945	1.043.10^−3	142.86	0.997
	323	115.54	0.045	52.61	0.940	1.524. 10^−3	125.00	0.999
AlCB	293	105.39	0.035	67.83	0.996	0.730.10^−3	125.00	0.998
	303	105.65	0.034	61.19	0.964	1.09. 10^−3	110.12	0.997
	313	105.69	0.033	37.98	0.907	1.93. 10^−3	111.10	0.999
	323	107.34	0.047	39.69	0.844	2.53. 10^−3	111.50	0.999
FeCB	293	66.20	0.029	17.01	0.968	4.10.10^−3	70.20	0.998
	303	66.79	0.033	16.44	0.954	5.00.10^−3	71.23	0.999
	313	67.61	0.035	14.56	0.882	6.53.10^−3	71.43	0.998