ltered; the concentrations of investigated metals
were determined by spectrophotometric methods,
using a Perkin Elmer 370 AAS.
Industrial wastewaters from lead and zinc industry
are acidic (pH 1.7-2.35). Upon treatment
and fi ltration, the fi ltrate was analysed for pH and
Pb, Zn, Cd and Cu content. The same experimental
procedure was used to asses sorbent properties of
ash in treating the real systems, a water stream of
Sitnica river, which was analysed against Cu, Fe,
Mn ions.