Removal of Arsenite from Water by Ce-Al-Fe Trimetal Oxide Adsorbent: Kinetics, Isotherms, and Thermodynamics

Table 1

The kinetic parameters for the pseudo-first-order, pseudo-second-order, and intraparticle diffusion model at different initial As (III) concentrations and 25°C.

Kinetic models	Parameters	(mg·L^−1)
		3	8	10
Pseudo-first-order	(mg·g^−1)	1.225	3.273	4.097
	(h^−1)	0.048	0.038	0.031
	(mg·g^−1)	0.905	1.300	1.440
		0.929	0.767	0.810
Pseudo-second-order	(g·mg^−1·h^−1)	0.503	0.150	0.171
	(mg·g^−1)	1.269	3.393	4.214
	(mg·g^−1·h^−1)	0.810	1.732	3.042
		0.999	0.999	0.999
Intraparticle diffusion	(mg·g^−1·h^1/2)	0.526	1.332	2.088
		0.085	0.198	0.358
		0.999	0.999	0.999
	(mg·g^−1·h^1/2)	0.330	0.811	0.829
		0.228	0.580	1.391
		0.885	0.948	0.969
	(mg·g^−1·h^1/2)	0.036	0.109	0.112
		0.992	2.346	3.356
		0.882	0.936	0.881