About: Mobility of vanadium and arsenic in mine tailings in semiarid northeastern Namibia

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Two sites in the semiarid Otavi Mountain Land in NE Namibia have been investigated. At Berg Aukas, Vrich mine tailings are >30 y old, but most V remains in primary descloizite embedded in carbonate matrix. Released V was incorporated into ferric hydroxides later transformed to hematite. In contrast, released Zn and Pb were incorporated into smithsonite and cerussite, which are less stable from environmental viewpoint. At Kombat mine tailings, As released from pyrite was also incorporated into hematite, but Cu from dissolution of chalcopyrite and bornite precipitated as malachite and cerussite, which are also much less stable than hematite. It seems that formation of hematite, which is relatively fast in tropical climate conditions, is favourable for attenuation of contaminants released into pore water. Two sites in the semiarid Otavi Mountain Land in NE Namibia have been investigated. At Berg Aukas, Vrich mine tailings are >30 y old, but most V remains in primary descloizite embedded in carbonate matrix. Released V was incorporated into ferric hydroxides later transformed to hematite. In contrast, released Zn and Pb were incorporated into smithsonite and cerussite, which are less stable from environmental viewpoint. At Kombat mine tailings, As released from pyrite was also incorporated into hematite, but Cu from dissolution of chalcopyrite and bornite precipitated as malachite and cerussite, which are also much less stable than hematite. It seems that formation of hematite, which is relatively fast in tropical climate conditions, is favourable for attenuation of contaminants released into pore water. (en)
Title	Mobility of vanadium and arsenic in mine tailings in semiarid northeastern Namibia Mobility of vanadium and arsenic in mine tailings in semiarid northeastern Namibia (en)
skos:prefLabel	Mobility of vanadium and arsenic in mine tailings in semiarid northeastern Namibia Mobility of vanadium and arsenic in mine tailings in semiarid northeastern Namibia (en)
skos:notation	RIV/00025798:_____/14:00000111!RIV15-GA0-00025798
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP210/12/1413)
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Majer, Vladimír Kříbek, Bohdan Knésl, Ilja
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Česká geologická služba
http://linked.open...dnocenehoVysledku	29642
http://linked.open...ai/riv/idVysledku	RIV/00025798:_____/14:00000111
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	mine tailings, vanadium, arsenic, hematite, attenuation (en)
http://linked.open.../riv/klicoveSlovo	arsenic attenuation hematite mine tailings vanadium
http://linked.open...ontrolniKodProRIV	[C0114DFDB745]
http://linked.open...v/mistoKonaniAkce	Praha
http://linked.open...i/riv/mistoVydani	Prague
http://linked.open...i/riv/nazevZdroje	Addressing environmental and health impacts of active and abandoned mines in Sub-Saharan Africa. Proceedings of the Closing Workshop of the IGCP/SIDA Projects 594 and 606,Prague, Czech Republic, May 26—28, 2014
http://linked.open...in/vavai/riv/obor	DD
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	9 (xsd:int)
http://linked.open...vavai/riv/projekt	Impact of ore mining and processing on the environment in Namibia: Modelling pollutants migration in soils, plants and groundwaters
http://linked.open...UplatneniVysledku	2014
http://linked.open...iv/tvurceVysledku	Kříbek, Bohdan Majer, Vladimír Mihaljevič, Martin Penížek, Vít Šráček, Ondřej Ettler, Vojtěch Vaněk, Aleš Knésl, Ilja Mapani, Benjamin
http://linked.open...vavai/riv/typAkce	CST - Celostátní
http://linked.open.../riv/zahajeniAkce	2014-05-26 (xsd:date)
number of pages	3 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Czech geological survey
https://schema.org/isbn	978-80-7075-858-8

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