Vanadium-rich slags from the historical processing of Zn–Pb–V ores at Berg Aukas (Namibia): Mineralogy and environmental stability
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F20%3A00000087" target="_blank" >RIV/00025798:_____/20:00000087 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/20:10410970 RIV/60460709:41210/20:81570
Result on the web
<a href="https://www.sciencedirect.com/science/article/abs/pii/S088329271930280X?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S088329271930280X?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.apgeochem.2019.104473" target="_blank" >10.1016/j.apgeochem.2019.104473</a>
Alternative languages
Result language
angličtina
Original language name
Vanadium-rich slags from the historical processing of Zn–Pb–V ores at Berg Aukas (Namibia): Mineralogy and environmental stability
Original language description
This study focuses on the mineralogical and geochemical investigation of the V-rich slags issued from the processing of the local ores in the Waelz kiln, which was operational between 1968 and 1980 and left ca. 500 kt of slag deposited on the adjacent dump. The average concentrations of the metal(loid) contaminants in the slags are 3.78 wtpercent Zn, 3370 mg/kg Pb, 5880 mg/kg V, 767 mg/kg Cu, 578 mg/kg As and 92 mg/kg Sb. The mineralogy is dominated by high-temperature silicates (clinopyroxene, melilite, olivine-family phases) and Zn-bearing phases (willemite, zincite). The EU regulatory leaching tests indicated that the release of the metal(loid) contaminants is quite low at the natural pH (deionized water extract: 8.5–10.4) obtained by extraction in the deionized water and only Sb in all the slag samples exceeds the EU limits for the landfilling of inert waste. The pH-static leaching tests revealed up to 5 orders of magnitude higher release of Pb and Zn under acidic conditions (up to 38percent and 63percent of their total concentration, respectively), compared to the natural pH. Using the slag reprocessing costs by acidic (bio)leaching and the current metal prices, the recovery of V, being the most important critical metal in the Berg Aukas slags, seems to be non-economical.
Czech name
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Czech description
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Classification
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
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Applied Geochemistry
ISSN
0883-2927
e-ISSN
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Volume of the periodical
114
Issue of the periodical within the volume
March : 104473
Country of publishing house
GB - UNITED KINGDOM
Number of pages
11
Pages from-to
nestránkováno
UT code for WoS article
000518403400017
EID of the result in the Scopus database
2-s2.0-85081075446