Metal

Pseudo-1^st-order

Pseudo-2^nd-order

Intra-particle diffusion

Elovich

$q_e^{*}$ (mg/g)

K₁

$q_e^{**}$ (mg/g)

R²

K₂

$q_e^{**}$ (mg/g)

R²

k_i

R²

C

β

R²

Pb(II)

26.68

0.019

5.32

0.9835

0.01

27.17

0.999

0.37

0.887

21.61

0.65

0.983