Physical-chemical characterization of uranium containing sediments

Authors

  • Lucia Závodská Department of Nuclear Chemistry, Comenius University in Bratislava, Mlynská dolina, Bratislava, SK- 842 15, Bratislava 4, Slovak Republic
  • Eva Kosorínová Department of Biotechnology, University of SS Cyril and Methodius, J. Herdu 2, Trnava, SK-917 01, Slovak Republic
  • Juraj Lesný Department of Biotechnology, University of SS Cyril and Methodius, J. Herdu 2, Trnava, SK-917 01, Slovak Republic
  • Dušan Bodiš State Geological Institute of Dionýz Štúr, Mlynská dolina 1, Bratislava 11, SK-817 04, Slovak Republic

DOI:

https://doi.org/10.36547/nbc.1139

Keywords:

uranium, sediments, groundwater, sequential fractionation

Abstract

The presented paper is intended to study the chemical behaviour of combined geogenicanthropogenic uranium content in specific stream sediments. The sampling points have been chosen with respect to the natural conditions in the locality of groundwater outflow from a former uranium mine adit in Považský Inovec mountain range, near Kálnica village. Besides the total uranium determination and physical-chemical characterization of the relevant water- and sediment samples we carried out modified Tessier type sequential fractionation extractions of natural- and artificially contaminated sediment samples after time dependent agitation in air and in the atmosphere of argon. The obtained results have been compared with those fulfilled with montmorillonite K-10. The total uranium concentrations of the relevant groundwater samples as well as of stream sediments have been determined by ICP-MS using HP 4500. The determinations of uranium in extracts have been accomplished according STN757614, utilizing arsenazo III as a selective complex forming reagent for spectrophotometric determination of uranyl-ions at 650 nm. The total uranium concentration of the groundwater outflow and in the sediment taken in its immediate vicinity has been 31.75±0.35 μg dm-3 and 38.0±2.7 μg g-1 respectively. Unlike montmorillonit K-10, in which the carbonate-bound fraction of uranium after 1 week aeration and agitation in argon atmosphere represents 22.8% and 18.6% respectively, uranium in investigated sediments has been present predominantly in carbonate-bound fraction-reaching under similar conditions 38.6% and 26.6%, respectively.

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Published

2021-09-02

How to Cite

Závodská, L., Kosorínová, E., Lesný, J., & Bodiš, D. (2021). Physical-chemical characterization of uranium containing sediments. Nova Biotechnologica Et Chimica, 9(3), 303-312. https://doi.org/10.36547/nbc.1139

Issue

Section

Research Articles
Received 2021-09-02
Published 2021-09-02