Abstract
In this paper the analysis of atmospheric deposition fluxes of Pb, Cd, Ni, and As in the Bor town (Serbia) is presented for the period 2011-2020. The results of measurements from the period of operation of the old smelter (2011-2015) were compared with the results of measurements during the period of operation of the new smelter (2016-2020). As a result of changes in the copper smelting technology and the better treatment of waste gases in the smelter, the average level of the total atmospheric depositon (TAD) was reduced by 63% in the period 2016-2020. The reduction of atmospheric deposition fluxes of Pb (59%), Cd (34%), and As (65%) are detected at all sampling points in the period 2016-2020. In contrast, the fluxes of Ni were increased (211%). Also, pH values of TAD have been changed at all sampling points from acidic (5.7 pH), during the period of operation of the old smelter, to alkaline (7.7 pH) in the period of operation of the new smelter.The presence of a very strong (r>0.8) and strong (0.8>r>0.6) Pearson correlation between the atmospheric deposition fluxes of cancerogenic elements were determined at all sampling points during the period 2016-2020, as opposed to the period 2011-2015 where these correlations were weak (r<0.4).
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