Table 5 Calculated parameter for different isothermal for the adsorption of copper by Bacillus pumilus and Bacillus subtilis

Langmuir

q_m (mg. g⁻¹)

11.876

19.88

b (L. mg⁻¹)

0.2929

0.0649

R²

0.9974

0.9035

Freundlich

1/n

0.164

0.257

K_F (mg. g⁻¹ (L. mg⁻¹) ^1/n)

5.66

4.569

R²

0.9348

0.9235

Temkin

A_T (L. mg⁻¹)

0.0031

0.0027

b_T (J. mol⁻¹)

43.9

50.27

R²

0.943

0.93

Dubinin and Radushkevich

β × 10⁻⁸ (mol². J⁻²)

2

2

E (KJ. mol⁻¹)

5

5

R²

0.987

0.964