Research Article

Biosorption of Pb(II) Ions by Klebsiella sp. 3S1 Isolated from a Wastewater Treatment Plant: Kinetics and Mechanisms Studies

Table 2

Kinetic models tested.

ModelEquation

Pseudo-first order or Lagergren [14]
Pseudo-second order [15]
Elovich [16]
Intraparticle diffusion or Weber and Morris [14]

: biosorption capacity (mg/g) at time , according to (1).
: biosorption capacity (mg/g) at equilibrium.
: pseudo-first-order kinetic rate constant (min−1).
: pseudo-second-order kinetic rate constant (g·mg−1·min−1).
: Elovich constant (mg·g−1·min−1).
: Elovich constant (g·mg−1).
: intraparticle diffusion rate constant in the bacterium (mg·g−1·min−1/2).