o:6661 Geochemical Distribution of Ni, Cr, and Co in the Main Soil Types of the Čemernica River Basin in Serbia (In a Serpentine Environment) en Abstract: The origin and bioavailability of nickel (Ni), chromium (Cr), and cobalt (Co) have been assessed in the Cˇ emernica River basin among the following soil types: Leptosol on serpentinite and Fluvisol, Vertisol, and Leptosol on sandstone. Alongside the impact of serpentine rocks, part of the region also displays significant anthropogenic activity. A sequential analysis following the modified BCR procedure identified four fractions of heavy metals: F1—exchangeable and acid-soluble, F2— bound to Fe and Mn oxides, F3—bound to organic matter, and F4—residual. The overall content of Ni, Cr, and Co in the soil increases in the following order: Leptosol on sandstone, and Vertisol, Fluvisol, Leptosol on serpentinite. In most samples, the values exceed the maximum allowable concentrations in legal regulations, while in some samples, particularly in serpentine soils, they also exceed the remediation thresholds. The average contribution of nickel in the overall content decreases as follows: F4 > F2 > F3 > F1, chromium as F4 > F3 > F2 > F1, and cobalt in the most samples as F2 > F4 > F1 > F3. The percentage of Ni, Cr, and Co in the fractions of different soil types is similar to that in serpentine soils, though the absolute contents vary significantly, indicating a common origin, which is mostly geochemical. According to the Risk Assessment Code, most samples exhibit a low bioavailability risk. potentially toxic elements (PTEs); nickel; chromium; cobalt; sequential extraction; DTPA extractable elements; potential metal availability; serpentine; soil pollution 1552099 10.3390/land13122075 2024-12-18T08:38:13.277Z 44 no 46 Sonja Tošić Jojević Institute of Soil Science 0000-0002-3865-6529 46 Vesna Mrvić Institute of Soil Science 0000-0002-6666-0875 46 Olivera Stajković-Srbinović Institute of Soil Science 0000-0001-9759-843X 46 Marina Jovković Institute of Soil Science 0000-0001-7224-8556 46 Svetlana Antić Mladenović Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11080 Belgrade, Serbia 46 Matija Krpović Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11080 Belgrade, Serbia 46 Snežana Belanović Simić Faculty of Forestry, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia application/pdf 2375269 https://unilib.phaidrabg.rs/o:6661 no yes 1 70 92000001 71A05 Land 2024