Abstract
Zinc is an important metal for humans and the environment. Its intensive application in industry has led to water and soil
contamination. A lot of microorganisms both unicellular and multicellular can be applied for removal of metals from the
environment. The process of zinc adsorption by cyanobacteria Spirulina platensis biomass was investigated. The concentrations
of 0.34 mM and 3.4 mM of ZnSO4ˇ7H2O were used. The process of biosorption of zinc was studied during 1-hour experiment.
To determine the elemental content of the samples, neutron activation analysis was applied. The maximum sorption capacity for
Zn was determined to be 9000 μg/g at the initial concentration of ZnSO4ˇ7H2O of 3.4 mM. At the lowest initial concentration of
zinc salt almost all Zn was removed from solutions.