Arsenic-rich stalactites from abandoned mines: Mineralogy and biogeochemistry

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Arsenic-rich stalactites from abandoned mines: Mineralogy and biogeochemistry

Popis výsledku v původním jazyce

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 &lt; 4.4, while HFO-rich stalactites precipitated at a higher pH (&gt;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&apos;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.

Název v anglickém jazyce

Arsenic-rich stalactites from abandoned mines: Mineralogy and biogeochemistry

Popis výsledku anglicky

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 &lt; 4.4, while HFO-rich stalactites precipitated at a higher pH (&gt;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&apos;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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GA16-09352S" target="_blank" >GA16-09352S: K hlubšímu poznání environmentální mineralogie arzenu v redukčních podmínkách: Vznik realgaru a jeho využití při sanaci</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Applied Geochemistry

ISSN

0883-2927

e-ISSN

—

Svazek periodika

129

Číslo periodika v rámci svazku

June

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

104960

Kód UT WoS článku

000656157900003

EID výsledku v databázi Scopus

2-s2.0-85104705260