2. ENVIRONMENTAL ChEMISTRy & TEChNOLOGy 2.1. Lectures

Chem. Listy, 102, s265–s1311 (2008) Environmental Chemistry & Technology
This biosorption batch experiment represents a mineralsdominated
regime in which the bacterial concentration is low,
and therefore the difference of mineral and cell adsorption
is big in the biological processes of pH change from 7 to 4
during silicate biofiltration and of pH change from 7 to 9
during carbonate biofiltration.
The result dominantly involves decreasing metal concentration
in solution in dependence of time and kind of
minerals. This indicates that the contact time between the
metal solution and the mineral kind and also the bacterial
amount is of crucial importance.
Conclusions
The batch adsorption experiment in ternary and binary
systems with individual sorbents, ternary metal-mineralbacteria
and binary metal-bacteria interaction can be used to
ascertain the effect of bacteria and selected of minerals like
packing materials in development of biofilters. The results
suggest that the adsorption observed in the 0.1 g dm –3 bacterial
dm –3 system dominantly involves the mineral surface
s478
that is why biofiltration need to increase bacterial amount in
packing filter.
This work has been supported by the Slovak Academy of
Sciences (VEGA 2/0049/08).
REFEREnCES
1. Leppert D.: Mining. Eng. 42, 604 (1990).
2. Pradas E. G., Sánchez M. V., Cruz F. C., Viciana M. S.,
Pérez M. F.: J.Chem. Tech. Biotechnol. 59, 289 (1994).
3. Elzinga E. J., Reeder R. J.: Geochimica et Cosmochimica
Acta 66, 3943 (2002).
4. Godelitsas A., Astilleros J. M., Hallam K., Harissopoulos
S., Putnis A.: Environ. Sci. Technol. 37, 335 (2003).
5. Panchanodikar V. V., Das R. P.: Int. J. Environ. Stud. 44,
251 (1993).
6. Kuyucak n., Volesky B.: Biotechnol. Lett. 10, 137
(1988)
7. Yee n., Fein J. B.: Chem. Geol. 185, 303 (2002).