Microbial effects on the release and attenuation of arsenic in the shallow subsurface of a natural geochemical anomaly

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F13%3A10139383" target="_blank" >RIV/00216208:11310/13:10139383 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985831:_____/13:00392994 RIV/68081715:_____/13:00392994

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.envpol.2013.05.010" target="_blank" >http://dx.doi.org/10.1016/j.envpol.2013.05.010</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.envpol.2013.05.010" target="_blank" >10.1016/j.envpol.2013.05.010</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microbial effects on the release and attenuation of arsenic in the shallow subsurface of a natural geochemical anomaly

Popis výsledku v původním jazyce

Critical factors leading to arsenic release and attenuation from the shallow subsurface were studied with multidisciplinary approach in the natural gold-arsenic geochemical anomaly at Mokrsko (Czech Republic). The results show that microbial reduction promotes arsenic release from Fe(III) (hydr)oxides and Fe(III) arsenates, thereby enhancing dissolved arsenic in the shallow groundwater at average concentration of 7.76 mg/L. In the organic-rich aggregates and wood particles, however, microbial sulfate reduction triggers the formation of realgar deposits, leading to accumulation of As in the distinct organic-rich patches of the shallow subsurface. We conclude that precipitation of realgar in the shallow subsurface of soil/sediment depends on specific andnon-trivial combination of water and rock chemistry, microbial community composition and spatial organisation of the subsurface zone, where speciation in saturated environments varied on a centimeter scale from reduced (decomposed wood,

Název v anglickém jazyce

Microbial effects on the release and attenuation of arsenic in the shallow subsurface of a natural geochemical anomaly

Popis výsledku anglicky

Critical factors leading to arsenic release and attenuation from the shallow subsurface were studied with multidisciplinary approach in the natural gold-arsenic geochemical anomaly at Mokrsko (Czech Republic). The results show that microbial reduction promotes arsenic release from Fe(III) (hydr)oxides and Fe(III) arsenates, thereby enhancing dissolved arsenic in the shallow groundwater at average concentration of 7.76 mg/L. In the organic-rich aggregates and wood particles, however, microbial sulfate reduction triggers the formation of realgar deposits, leading to accumulation of As in the distinct organic-rich patches of the shallow subsurface. We conclude that precipitation of realgar in the shallow subsurface of soil/sediment depends on specific andnon-trivial combination of water and rock chemistry, microbial community composition and spatial organisation of the subsurface zone, where speciation in saturated environments varied on a centimeter scale from reduced (decomposed wood,

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CB - Analytická chemie, separace

OECD FORD obor

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Projekt

<a href="/cs/project/GPP210%2F10%2FP096" target="_blank" >GPP210/10/P096: Biogeochemické transformace arsenu v neutrálních půdách a potočních sedimentech na zlatonosném ložisku Mokrsko</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

Environmental Pollution

ISSN

0269-7491

e-ISSN

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Svazek periodika

180

Číslo periodika v rámci svazku

neuvedeno

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

84-91

Kód UT WoS článku

000322425300013

EID výsledku v databázi Scopus

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