Removal of Cadmium (II), Chromium (III), and Lead (II) Heavy Metal Ions from Water by Graft Copolymerization of Acrylonitrile onto Date Palm Fiber Using H₂O₂/Fe⁺⁺ as an Initiator

Table 2

Langmuir and Freundlich isotherm constants for lead (II), Cr (III), and Cd (II) adsorption on amidoxime chelating resin.

Compounds	(k)	Langmuir isotherm constants				Freundlich isotherm constants
		(mg/g)	(L/mg)			1/
Lead (II)	298.16	43.86	9.12	0.002	0.999	0.04	23.15	48.62	0.8638
Chromium (III)	298.16	42.74	5.32	0.004	0.999	0.06	15.43	49.74	0.9701
Cadmium (II)	298.16	32.47	1.54	0.012	0.993	0.10	10.04	48.07	0.7647