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Table 3 Parameters of Langmuir and Freundlich isotherms for sorption of Pb(II) and Cd(II) on modified Amberlite XAD-4 resin

From: Determination of some heavy metals from aqueous solutions using modified Amberlite XAD-4 resin by selective solid-phase extraction

Metal ion

Langmuir isotherm method

Freundlich isotherm method

b

Q0

R2

RL

Kf

n

R2

Pb (II)

0.0052

0.2647

0.9962

0.9058

0.0282

0.3093

0.9895

Cd (II)

0.0080

0.6553

0.9980

0.8620

0.0315

0.1918

0.9774