TABLE 1.

Adsorption isotherm parameters for the adsorption of Pb(II) ions onto the hydrogel adsorbent.

Samples	qe (mg/g)	Langmuir equation			Freundlich equation
		qm (mg/g)	b (L/mg)	R 2	K	n	R 2
SA-g-PNaA	775.92	781.25	0.0460	0.9998	368.03	9.558	0.9479
Semi-IPN2	784.97	787.40	0.0434	0.9997	372.88	9.708	0.9414
Semi-IPN10	726.66	729.93	0.0307	0.9996	351.61	10.189	0.9338
Semi-IPN20	665.05	666.67	0.0299	0.9997	328.22	10.487	0.9513