Table 2 Parameter values of the isotherm models in the adsorption of dyes by the PAC adsorbent.

From: The removal of anionic and cationic dyes from an aqueous solution using biomass-based activated carbon

Models

Parameter

CR

MB

RSS

RS

RSS

RS

Freundlich

k (mg g−1)

0.57

0.32

0.48

0.28

1/n

0.46

0.53

2.14

0.18

R2

0.89

0.67

0.76

0.91

Langmuir

R1

0.99

0.79

0.79

0.51

Qmax (mg g−1)

659.35

227.27

458.43

769.23

R2

0.98

0.51

0.64

0.87

Dubinin-Radushkevich

Qmax (mg g−1)

471.77

93.61

479.81

63.37

E (kJ/mol)

1.65

2.34

1.84

2.67

R2

0.81

0.76

0.67

0.54

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