Characterization and Utilization of Tannin Extract for the Selective Adsorption of Ni (II) Ions from Water

Table 4

The correlation coefficients of kinetic parameters for the adsorption of Ni (II) ions onto TGAN.

Kinetic models	Variables	TGAN-Ni
Pseudo-first-order		0.0552
		169.82
		0.0934
Pseudo-second-order		10.2
		13.89
		0.0147
		0.988
Intraparticular diffusion		3.150
		5.145
		0.906