isotherm’s

parameters

Pb²⁺

Cu²⁺

Cd²⁺

Langmuir model

Qmax (mg/g)

88.3392226

87.9507476

88.5739593

KL (L/mg)

0.07740171

0.03441908

0.03744734

R2

0.99006

0.98383

0.97889

Freundlich model

Kf

12.5504703

8.06956269

8.70422282

1/n

0.39361

0.44191

0.4312

R2

0.83899

0.85904

0.78061

Temkin model

BT (J・mol⁻¹)

14.32466

14.02034

13.91482

KT (L・mg⁻¹)

1.49625905

0.71378433

0.81256449

R2

0.93553

0.87903

0.86629