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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F18%3A73587517" target="_blank" >RIV/61989592:15310/18:73587517 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0375674217308567" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0375674217308567</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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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 &gt;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 μg/L), Se (up to 50 μg/L), and Mo (up to 28 μg/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− &gt; UO2(CO3)22− &gt; UO2(CO3)34− &gt; 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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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 &gt;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 μg/L), Se (up to 50 μg/L), and Mo (up to 28 μg/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− &gt; UO2(CO3)22− &gt; UO2(CO3)34− &gt; 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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Journal of Geochemical Exploration

ISSN

0375-6742

e-ISSN

—

Svazek periodika

191

Číslo periodika v rámci svazku

AUG

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

21

Strana od-do

1-21

Kód UT WoS článku

000436826000001

EID výsledku v databázi Scopus

2-s2.0-85047086509