Heavy metal ions adsorbed

Freundlich Isotherm

Temkin Isotherm

kf

n

R2

A

B

b = RT/B

R2

Nickel

0.479

1.035

0.995

0.143

8.89

281.498

0.958

Copper

5.578

0.799

0.978

1.134

17.52

142.838

0.955

Zinc

11.98

1.536

0.939

5.004

7.999

312.853

0.952

Lead

3.658

1.157

0.985

0.439

18.88

132.548

0.99

Cadmium

4.167

1.919

0.909

0.638

7.969

314.031

0.97

Chromium

10.01

0.710

0.956

2.116

14.42

173.545

0.974