Treatment

Metal

Freundlich constants and correlation coefficients

Sorption

Desorption

K_a

n

r²

K_a

n

r²

T1

Cr

0.09

1.4

0.96

0.01

1.27

0.1

Zn

0.04

0.71

0.72

0.011

0.93

0.9

Cu

0.05

1.3

0.92

0.012

0.97

0.99

Pb

0.06

1.22

0.95

0.014

1.02

0.98

T2

Cr

0.1

1.32

0.98

2.3 × 10⁻³

2.67

0.09

Zn

0.03

0.67

0.93

6.59 × 10⁻⁴

0.33

0.4

Cu

0.03

1.16

0.91

0.013

0.98

0.99

Pb

0.06

1.23

0.93

0.013

1

0.99

T3

Cr

0.1

1.46

0.96

2.64 × 10⁻³

3.73

0.02

Zn

0.16

1.17

0.45

8.97 × 10⁻³

0.83

0.97

Cu

0.06

1.31

0.92

0.013

1.05

0.95

Pb

0.1

1.41

0.98

0.013

0.99

0.98