Evaluation of thallium isotopic fractionation during the metallurgical processing of sulfides: An update

Autor
Vaněk, Aleš
Vejvodová, Kateřina
Teper, Leslaw
Cabala, Jerzy
Sutkowska, Katarzyna
Voegelin, Andreas
Goettlicher, Joerg
Holubík, Ondřej
Vokurková, Petra
Pavlů, Lenka
Galušková, Ivana
Zádorová, Tereza
Datum vydání
2022Publikováno v
Journal of Hazardous MaterialsRočník / Číslo vydání
424 (Part A, February)ISBN / ISSN
ISSN: 0304-3894Metadata
Zobrazit celý záznamKolekce
Tato publikace má vydavatelskou verzi s DOI 10.1016/j.jhazmat.2021.127325
Abstrakt
In this study, we report combined Tl isotopic and Tl mineralogical and speciation data from a set of Tl-rich sulfide concentrates and technological wastes from hydrometallurgical Zn extraction. We also present the first evaluation of Tl isotopic ratios over a cycle of sulfide processing, from the ore flotation to pyro- and hydrometallurgical stages. The results demonstrate that the prevailing Tl form in all samples is Tl(I), without any preferential incorporation into sulfides or Tl-containing secondary phases, indicating an absence of Tl redox reactions. Although the Tl concentrations varied significantly in the studied samples (similar to 9-280 mg/kg), the overall Tl isotopic variability was small, in the range of -3.1 to -4.4 +/- 0.7 (2 sigma) epsilon Tl-205 units. By combining present epsilon Tl-205 results with the trends first found for a local roasting plant, it is possible to infer minimum Tl isotopic effects throughout the studied industrial process. As a result, the use of Tl isotopic ratios as a source proxy may be complicated or even impossible in areas with naturally high/extreme Tl background contents. On the other hand, areas with two or more isotopically contrasting Tl sources allow for relatively easy tracing, i.e., in compartments which do not suffer from post-depositional isotopic redistributions.
Klíčová slova
Waste, Metallurgy, Isotopic Fractionation, Speciation
Trvalý odkaz
https://hdl.handle.net/20.500.14178/1573Licence
Licence pro užití plného textu výsledku: Creative Commons Uveďte původ-Neužívejte dílo komerčně-Nezpracovávejte 4.0 International