reached after ca. 10min. The ions are bound with the
biomass stably: the concentration of metal ions remained
unchanged for 100h. The experimental results
are shown only for one morphological form of cells
(A). It was found that kinetics pattern for all the forms
are similar, independently on the biomass growth conditions
(Chojnacka, 2003).
The process of biosorption proceeded according to
equilibrium first order kinetics pattern. Reaction rate
constants (kad and kde) were determined by non-linear
regression (Mathematica v. 3.0) (Table 1). The values
of kad were in the range 14–33h1 and kde: 3–
8.7meqhkg1 for different metal cations. The experimental
points were described with the model equation
(Fig. 1) according to Langmuir model for chemisorption
with experimentally determined the constants.