Heavy metal characteristics in Kočani Field plant system\ud (Republic of Macedonia)

摘要

Heavy metal contamination of soils is\udwidespread and induces a long-term risk to ecosystem\udhealth. This research focuses on the heavy metal\udcontamination, transfer values and risk assessment in\udthe Kočani Field plant system (Republic of Macedonia).\udTo identify the heavy metal concentrations in\udKocˇani crops (rice and maize), the geochemical\udanalysis was performed by inductive coupled plasma\udmass spectrometer and thereupon the transfer factor\ud(TF) and estimated daily intake amount values were\udcalculated. The highest As, Cd, Mo, Pb and Zn values\udwere determined in the rice samples grown in the\udpaddy fields near the Zletovska River. The highest Pb\udand Mo concentrations measured in the maize samples\udwere from the maize fields near the Zletovska River\udand Ciflik city. High TF values for Mo, Zn, Cd and Cu\udrevealed a strong accumulation of Mo, Zn and Cd\udby rice and Mo and Zn by maize crops. The results of\udthe estimated daily intake showed that the regular\udconsumption of rice and maize crops containing the\udhighest Cd, Mo, Pb and Zn concentrations could pose\uda serious threat to human health, because the daily\udintake of Cd, Mo, Pb and Zn for crops grown in the\udfields around the Zletovska River exceeded the\udrecommended provisional tolerable daily intake values.\udTaking into account the results, the area around\udZletovska River is considered as the most anthropogenically\udimpacted part of Kočani Field.