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Journal of Analytical Science and Technology

Table 1 Equilibrium isotherm parameters of the defluoridation process

From: Kinetic and thermodynamic studies for fluoride removal using a novel bio-adsorbent from possotia (Vitex negundo) leaf

PLP dose (g/L)

Langmuir isotherm

Freundlich isotherm

Temkin isotherm

 

a (mol/g)

b (L/mg)

R L

1/n

K (L/g)

B (J/mol)

A T (L/g)

3 mg/L

6 mg/L

9 mg/L

12 mg/L

15 mg/L

1

10.75269

26.41938

0.01246

0.006269

0.004188

0.003144

0.002517

0.598

2.118361

5.583

1.395779

2

3.703704

5.577867

0.05639

0.029013

0.019531

0.01472

0.011811

0.532

1.08893

2.536

1.465255

3

3.067485

3.319789

0.091246

0.047804

0.032385

0.024487

0.019686

0.54

0.810961

1.734

1.562499

4

2.12766

2.067696

0.138829

0.074592

0.050996

0.038741

0.031235

0.504

0.656145

1.242

1.682087

5

1.550388

1.701852

0.163785

0.089197

0.061287

0.04668

0.037696

0.462

0.594292

0.948

1.902833

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