Table 5: Kinetic models for Cu and Fe ions removal from electroplating wastewater using CHS and COMP.

 

CHS

COMP

Kinetic Models

Metals

Metals

Pseudo-first order

Cu

Fe

Cu

Fe

K1

5.33 × 10-4

1.27 × 10-3

1.33 × 10-3

3.76 × 10-3

R2

0.918

0.843

0.758

0.789

Standard error

0.004

0.003

0.021

0.053

Pseudo-second order

 

 

 

 

K2

2.40 × 10-4

2.90 × 10-4

5.60 × 10-4

9.40 × 10-4

R2

0.918

0.847

0.766

0.771

Standard error

0.004

0.003

0.001

0.014

Elovich

 

 

 

 

Δ

21.7200

5.0300

9.600

1.630

Θ

2.27 × 1018

1.63 × 107

1.41 × 107

14.700

R2

0.972

0.777

0.595

0.950

Standard error

0.006

0.078

0.063

0.104

Intraparticle diffusion

 

 

 

 

Kint

0.015

0.069

9.600

0.200

L

2.156

3.903

1.41 × 107

2.892

R2

0.956

0.814

0.595

0.997

Standard error

0.007

0.071

0.001

0.006