2025, Environmental Protection, Remediation and Risk Assessment, pp. 678-681
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Assessment of the copper availability by extraction of riverbed sediments from Eastern Serbia with 0.5 M HCl
aInstitut za rudarstvo i metalurgiju, Bor, Srbija bUniverzitet u Beogradu, Tehnički fakultet u Boru, Srbija cAkita University, Graduate School of International Resource Sciences, Akita City, Japan
email: stefan.djordjievski@irmbor.co.rs, aradojevic@tfbor.bg.ac.rs, tkalinovic@tfbor.bg.ac.rs, mnujkic@tfbor.bg.ac.rs, jkalinovic@tfbor.bg.ac.rs, jjordanovic@tfbor.bg.ac.rs, renata.kovacevic@irmbor.co.rs, y_
Project: Ministarstvo nauke, tehnološkog razvoja i inovacija Republike Srbije (institucija: Institut za rudarstvo i metalurgiju, Bor) (MPNTR - 451-03-68/2020-14/200052)
Ministarstvo nauke, tehnološkog razvoja i inovacija Republike Srbije (institucija: Univerzitet u Beogradu, Tehnički fakultet u Boru) (MPNTR - 451-03-68/2020-14/200131)
Keywords: copper; riverbed sediments; bioavailability; extraction
Abstract
This study assessed copper contamination and availability in riverbed sediments from 181 locations in Eastern Serbia. The highest total Cu concentrations (up to 26,400 mg/kg) with HCl-extractable fractions up to 80% were recorded downstream of the confluence of Bela and Timok Rivers, where secondary, highly labile copper phases dominated. In contrast, 145 of 181 samples contained <50% 0.5 M HCl-extracted Cu, indicating limited mobility. The findings highlight the need to assess both metal concentrations and speciation to evaluate ecological risk and guide site-specific management.
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