Table 4: Isotherm models parameters for the adsorption of Cu and Fe ions using CHS and COMP.

 

CHS

COMP

Isotherm Models

Metals

Metals

Jovanovic

Cu

Fe

Cu

Fe

Kj

0.348

0.211

0.348

0.218

qmax

7.907

11.900

7.905

11.905

R2

0.999

0.999

0.999

0.977

Standard error

6.0 × 10-4

2.34 × 10-6

4.0 × 10-4

0.068

Freundlich

 

 

 

 

Kf

6.402

11.759

6.377

10.907

N

-11.620

-515.464

-11.232

-39.154

R2

0.959

0.856

0.988

0.919

Standard error

7.5 × 10-3

1.1 × 10-3

4.0 × 10-3

7.17 × 10-3

Temkin

 

 

 

 

K1

-0.620

-0.023

-0.641

-0.352

K2

3.5 × 10-5

1.2 × 10-22

5.16 × 10-5

6.35 × 10-28

R2

0.966

0.856

0.990

0.954

Standard error

0.0494

0.0129

0.0264

0.0582

Harkins-Jura

 

 

 

 

AHJ

-130.513

-1.6 × 104

-126.326

-1127.39

BHJ

-3.114

-113.961

-3.033

-9.433

R2

0.946

0.855

0.984

0.911

Standard error

3.4 × 10-3

1.56 × 10-5

2.0 × 10-4

1.0 × 10-4