Potentially Toxic Elements and Pb Isotopes in Mine-Draining Meža River Catchment (NE Slovenia)

In the present study it was observed that Pb, Zn, Cd and As are still at elevated concentrations in environment of upper Meža Valley. particular, Pb indicate possible new sources have emerged. The main objective this to determine isotope composition both water sediments (fractions < 0.150 <0.063 mm) from River its tributaries for first time then use them as identifiers pollution sources. addition, by calculating PEC-Q values, potential hazard river evaluated. results showed Zn majority sampling sites. general, higher were determined mm fraction, while <0.150 fraction. fractions differed slightly, indicating an additional source.