Geochemical model of leaching field groundwaters at the Stráž uranium deposit

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F17%3A00108785" target="_blank" >RIV/00216224:14310/17:00108785 - isvavai.cz</a>

Result on the web

<a href="https://mnet.mendelu.cz/mendelnet2017/mnet_2017_full.pdf" target="_blank" >https://mnet.mendelu.cz/mendelnet2017/mnet_2017_full.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Geochemical model of leaching field groundwaters at the Stráž uranium deposit

Original language description

The paper suggests a means of applying geochemical modelling in the prediction of groundwater chemistry development and the optimization of remediation. The Geochemist's Workbench programme was used to create a geochemical model based on field data gained from the Stráž deposit. Two waters were picked, both with low pH (1.1 and 3.6), and concentrations of main ions were used. The compositions were charge balanced and then gradual mixing was modelled. Synthetic waters with the same composition were prepared in a laboratory and mixed in mixing fractions 0, 0.25, 0.5, 0.75, 0.95, 0.99 and 1. Redox potential, pH, and electrical conductivity were measured and compared with the geochemical model. Both of the chosen waters were undersaturated with respect to minerals, and the ionic composition of the prepared waters and during mixing was driven only by dilution. Within the comparison of the modelled and synthetic water parameters, almost identical results were obtained for pH, while redox potential and electrical conductivity were different. The difference in the redox potentials was probably caused by the presence of oxygen in the case of the synthetic water. The electrical conductivities values were similar; however, the model values were lower with higher pH. It is thus necessary to correct the model before its application to extreme waters, such as leaching field groundwaters. The presented results may be of use in efforts to improve the modelling of very acid groundwaters and help in understanding changes in parameters which affect mineral precipitation and the dissolution of uranium compounds.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

40101 - Agriculture

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

MendelNet 2017 : Proceedings of 24th International PhD Students Conference

ISBN

9788075095299

ISSN

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e-ISSN

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Number of pages

6

Pages from-to

471-476

Publisher name

Mendel University in Brno

Place of publication

Brno

Event location

Brno

Event date

Nov 8, 2017

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000440194500084