Geochemistry and environmental impact of neutral drainage from an uraniferous coal waste heap

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F18%3A00000108" target="_blank" >RIV/00025798:_____/18:00000108 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/18:10376692
Result on the web
<a href="https://doi.org/10.1016/j.gexplo.2018.05.001" target="_blank" >https://doi.org/10.1016/j.gexplo.2018.05.001</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.gexplo.2018.05.001" target="_blank" >10.1016/j.gexplo.2018.05.001</a>

Result language
angličtina
Original language name
Geochemistry and environmental impact of neutral drainage from an uraniferous coal waste heap
Original language description
The objective of this study was to assess to what extent the burnt and unburnt parts of the heap contribute to contamination of the local drainage system over a period lasting >40 years after the end of the mining. The water collected at the foot of the heap in periods of low drainage contains high levels of aqueous sulfate (up to 400 mg/L), carbonate (up to 208 mg/L), U (up to 585 microgram/L), Se (up to 50 microgram/L), and Mo (up to 28 microgram/L). On the other hand, the concentrations of these elements are lower in periods of high drainage. The pH values in the water drainage are in the near-neutral range, and uranium is mostly present as U(VI) with dominant phosphate and carbonate complexes in the order UO2(HPO4)22− > UO2(CO3)22− > UO2(CO3)34− > UO2CO30. The concentrations of sulfate and trace elements rapidly decrease with increasing distance from the heap as a result of dilution due to influx of water from uncontaminated streams.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10505 - Geology

Project
<a href="/en/project/GA16-13142S" target="_blank" >GA16-13142S: Mining and processing of Cu, Pb, Zn and Co ores in Sub-Saharan Africa – natural geochemical laboratories for investigation of pollutant behaviours</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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