Kinetic Studies on the Removal of Some Lanthanide Ions from Aqueous Solutions Using Amidoxime-Hydroxamic Acid Polymer

Table 2

Kinetic constants for pseudo-first-order and pseudo-second-order models for Ln³⁺ sorption.

	(Qe)exp (mg·g^−1)	Pseudo-first-order			Pseudo-second-order
		K1 (min^−1)	(Qe)cal (mg·g^−1)		K2 (g·mg^−1·min^−1)	(Qe)cal (mg·g^−1)
La^3+	1.85	1.61 × 10^−3	0.1593	0.7754	0.1831	1.80	0.9999
Nd^3+	1.98	1.38 × 10^−3	0.1842	0.8457	0.1548	1.91	0.9998
Sm^3+	2.28	1.38 × 10^−3	0.1647	0.8964	0.1700	2.22	0.9999
Gd^3+	2.38	1.61 × 10^−3	0.1854	0.7062	0.1735	2.31	0.9997
Tb^3+	2.48	1.38 × 10^−3	0.1759	0.7304	0.1887	2.41	0.9999