Isotherms

Parameters

Adsorbate

Congo Red

Methyl Orange

Langmuir

qm (mg/g)

24.81

21.23

KL

−0.4306

−0.1365

RL

−0.0078

−0.0250

R2

0.998

0.9989

Freundlich

nF

3.7

5.47

KF

37.3488

50.9732

R2

0.9919

0.9910

Temkin

bT (kJ/mol)

0.7374

−0.5362

BT

−2.6164

−4.6209

AT

1.11 x 10−6

9.06 × 10−5

R2

0.9932

0.9937

Dubinin?Radushkevich

BD (mol2/J2)

5 x 10−6

3 x 10−5

E(kJ/mol)

0.3162

0.1291

qD (mg/g)

26.06

23.09

R2

0.9359

0.9487

Harkins?Jura

AHJ

−1667

−769

BHJ

−0.8333

0.4615

R2

0.9889

0.9837