Deposition of Cu, Zn, Mn, Cr, Ni, Pb and Cd, and their concentrations in falling dust were measured in 1995-1998 in eastern Mazowieckie Province (former Siedleckie Province). No maximum permissible values of dust deposition, nor Pb and Cd concentrations, were exceeded. It was observed that the elements of low melting temperatures (Pb, Zn) reached higher concentrations in particulate matter, and higher deposition level in heating season compared with summer. Among all the examined metals Ni appeared to be the most stable in falling particulate matter. The results indicate that the main source of metals in falling particulate matter is the thermal and electric power industry.
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