Table 1 The values of the parameters of the adsorption isotherm models for Cs⁺ and Sr²⁺ uptake onto TNT.

Two parameters isotherm

Langmuir

q_m

74.67

162.59

K_L

0.02

0.12

R²

0.94

0.98

Freundlich

K_f

4.35

30.86

1/n_F

0.47

0.29

R²

0.94

0.95

Dubinin-Radushkevich

q_m

61.92

159.19

K_ad

0.005

0.001

R²

0.89

0.96

Temkin

b_T

307.95

130.25

A_T

1.12

12.27

R²

0.77

0.97

Three parameters isotherm

Redlich-Peterson

K_R

1.62

56.95

a_R

0.07

0.74

β

0.81

0.87

R²

0.95

0.99

Sips

q_m

95.54

189.29

Ks

0.02

0.17

1/n

0.77

0.63

R²

0.95

0.99

Langmuir-Freundlich

_MLF

95.6

189.29

_LF

0.008

0.06

_LF

0.77

0.63

R²

0.95

0.99

Toth

K_e

1.31

49.37

K_L

0.07

0.74

n

0.81

0.87

R²

0.95

0.99

Kahn

q_m

37.41

75.39

b_K

0.04

0.7

a_K

0.76

0.86

R²

0.95

0.99

Four-parameters isotherm

Baudu

q_m

13.02

68.33

b₀

0.08

1.11

x

0.28

0.15

y

0

0

R²

0.94

0.99

Five-parameters isotherm

Fritz-Schlünder

q_mFSS

16.8

44.21

K₁

0.27

0.7

K₂

0.02

0

m₁

0.47

0.29

m₂

0

0

R²

0.94

0.95