Film

qe,th

(mg/cm2)

qe,exp

(mg/cm2)

Pseudo-first order

Pseudo-second order

qe,calc

(mg/cm2)

K (min−1)

R2

qe,calc

(mg/cm2)

K

R2

DY/CH new

Concentrated dye

CH

0.17

0.16

0.14

(35.00 ± 2.00) × 10−4

0.96

0.12

(1.32 ± 1.00)

0.99

CH/EtOH 1d

0.17

0.17

0.16

(9.00 ± 1.00) × 10−4

0.95

0.07

(1.22 ± 1.00)

0.99

CH/EtOH 4d

0.17

0.16

0.16

(3.00 ± 1.5) × 10−4

0.69

0.022

/

/

Diluted dye

CH

0.019

0.014

0.015

(20.00 ± 1.00) × 10−4

0.97

3.7

/

/

CH/EtOH 1d

0.019

0.016

0.014

(43.00 ± 4.00) × 10−4

0.90

0.024

(81.32 ± 56.35) × 10−2

0.89

CH/EtOH 4d

0.019

0.016

0.012

(109.00 ± 7.00) × 10−4

0.94

0.029

1.01 ± 0.45

0.89

DY/CH std

Concentrated Dye

CH pH12

0.17

0.17

0.12

(22.00 ± 1.00) × 10−4

0.98

0.09

(0.14 ± 0.08)

0.98

CH/NaOH

0.19

0.24

0.24

(40.00 ± 1.00) × 10−4

0.99

0.38

(7.00 ± 2.00) × 10−3

0.90

CH/EtOH

1d

0.19

0.17

0.26

(42.00 ± 1.00) × 10−4

0.99

0.15

(53.09 ± 14.88) × 10−3

0.98

CH/EtOH

4d

0.20

0.21

0.20

(20.00 ± 1.00) × 10−4

0.98

0.13

(62.28 ± 25.00) × 10−3

0.98

Diluted dye

CH pH 12

0.019

0.019

0.018

(24.00 ± 1.50) × 10−4

0.97

0.0013

(62.10 ± 18.40) × 10−2

0.99

CH/NaOH

0.020

0.026

0.025

(81.00 ± 1.00) × 10−4

0.99

0.0036

(19.61 ± 4.66) × 10−2

0.99

CH/EtOH

4d

0.020

0.022

0.0021

(50.00 ± 1.50) × 10−4

0.99

0.023

(35.65 ± 15.04) × 10−2

0.94