The effect of geochemical evolution of AMD on mineral composition of stream sediments: preliminary study on Hadůvka stream, West-ern Moravia, Czech Republic.

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The effect of geochemical evolution of AMD on mineral composition of stream sediments: preliminary study on Hadůvka stream, West-ern Moravia, Czech Republic.

Popis výsledku v původním jazyce

Results from X-ray diffraction have showed that all recently formed minerals are amorphous, nearly amorphous (without regular crystal lattice) or cryptocrystalline and occur in mixture of several phases. Thus this method seems to be unsuitable for characterization of such fresh sediments. Modelling made with the aid of The Geochemists Workbench suggested hypo-thetical presence of goethite, pyrolusite, calcite and kaoline. Coupled with sequential and silicate analyses, this hypothetical minerals have been taken as normative for further evalua-tion of bottom sediments. Natural Hadůvka stream sediments are characterized by low con-tent of Fe- and Mn-oxyhydroxides (3 to 4 %) and carbonates (0.X %). Inflow of AMD into the stream causes rapid rising of insoluble HFO (20 to 30 %), carbonates (20 to 30 %) and clay minerals (5 to 10 %) content, but maximum of carbonates is slightly later than that of HFO. Presence of Mn-oxydroxides is also higher in polluted water, but maximum of precipitation

Název v anglickém jazyce

The effect of geochemical evolution of AMD on mineral composition of stream sediments: preliminary study on Hadůvka stream, West-ern Moravia, Czech Republic.

Popis výsledku anglicky

Results from X-ray diffraction have showed that all recently formed minerals are amorphous, nearly amorphous (without regular crystal lattice) or cryptocrystalline and occur in mixture of several phases. Thus this method seems to be unsuitable for characterization of such fresh sediments. Modelling made with the aid of The Geochemists Workbench suggested hypo-thetical presence of goethite, pyrolusite, calcite and kaoline. Coupled with sequential and silicate analyses, this hypothetical minerals have been taken as normative for further evalua-tion of bottom sediments. Natural Hadůvka stream sediments are characterized by low con-tent of Fe- and Mn-oxyhydroxides (3 to 4 %) and carbonates (0.X %). Inflow of AMD into the stream causes rapid rising of insoluble HFO (20 to 30 %), carbonates (20 to 30 %) and clay minerals (5 to 10 %) content, but maximum of carbonates is slightly later than that of HFO. Presence of Mn-oxydroxides is also higher in polluted water, but maximum of precipitation

Druh

D - Stať ve sborníku

CEP obor

DD - Geochemie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2003

Kód důvěrnosti údajů

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

Název statě ve sborníku

Applied Environmental Geology in Central and Eastern Europe

ISBN

3-85457-700-1

ISSN

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e-ISSN

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Počet stran výsledku

2

Strana od-do

56-57

Název nakladatele

Umweltbundesamt GmbH, Wien, Austria

Místo vydání

Wien

Místo konání akce

Wien

Datum konání akce

1. 1. 2003

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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