Arsenic-rich stalactites from abandoned mines: Mineralogy and biogeochemistry
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F21%3A10430042" target="_blank" >RIV/00216208:11310/21:10430042 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=HRGhY6k_CS" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=HRGhY6k_CS</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.apgeochem.2021.104960" target="_blank" >10.1016/j.apgeochem.2021.104960</a>
Alternative languages
Result language
angličtina
Original language name
Arsenic-rich stalactites from abandoned mines: Mineralogy and biogeochemistry
Original language description
Stalactites containing 0.13-294 g kg(-1) As were collected from abandoned adits of the former Mikulov and Plavno mines (NW Czech Republic), and were then characterized by: X-ray diffraction, bulk chemical analysis, electron microprobe and Raman microspectrometry, chemical composition of the drip water, and analyses of the microbial communities. Several assemblages of mineral phases were identified: (i) straws of X-ray amorphous hydrous ferric arsenate (HFA) with younger ka.nkite, (ii) pure HFA straws, (iii) straws composed of schwertmannite and HFA co-precipitates, and (iv) massive stalactites composed of X-ray amorphous hydrous ferric oxide (HFO) and HFA co-precipitates and minor hydrous manganese oxide (HMO). The chemistry of the drip water was closely linked to the solid phase composition of the stalactites. HFA- and schwertmannite-rich straws formed at pH < 4.4, while HFO-rich stalactites precipitated at a higher pH (>6.6). The concentrations of As and other trace elements (namely Pb and Zn) in the drip water is controlled by the solubility of HFA and/or sorption affinity of these elements to the schwertmannite, HFO, and HMO phases. Drying out of the HFA straws may lead to recrystallization and rearrangements of HFA, which result in formation of ka.nkite and chemically anomalous HFA domains enriched in Ca, K, Mn, Pb, S, and Zn. Analyses of the stalactite's microbial communities revealed autotrophic oxidation of Fe, As, and S as the main factors driving formation of secondary minerals. Contrasting communities were found in similar mineral assemblages of stalactites, suggesting the high variability of microhabitats within each stalactite.
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
<a href="/en/project/GA16-09352S" target="_blank" >GA16-09352S: Towards a better understanding of environmental As mineralogy under reducing conditions:Formation of realgar and evaluation of its role in remediation</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
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
129
Issue of the periodical within the volume
June
Country of publishing house
GB - UNITED KINGDOM
Number of pages
12
Pages from-to
104960
UT code for WoS article
000656157900003
EID of the result in the Scopus database
2-s2.0-85104705260