Arsenic fractionation and mobility in sulfidic wetland soils during experimental drying
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F21%3A10430047" target="_blank" >RIV/00216208:11310/21:10430047 - isvavai.cz</a>
Alternative codes found
RIV/60460709:41210/21:85299
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=MIgyo-wUzM" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=MIgyo-wUzM</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.chemosphere.2021.130306" target="_blank" >10.1016/j.chemosphere.2021.130306</a>
Alternative languages
Result language
angličtina
Original language name
Arsenic fractionation and mobility in sulfidic wetland soils during experimental drying
Original language description
In this study, two Czech wetland soils enriched in authigenic sulfide minerals (especially realgar) were collected from the saturated zone (60-100 cm), flooded with local groundwater and allowed to dry for up to 98 days. The objective was to examine the mobility of As, Fe, S and trace metals using selective chemical extractions, S isotopes and X-ray diffraction through the drying process. During the initial stage of incubation (similar to 20 days), the re-flooding of the soils triggered a microbially-mediated SO42- reduction, which immobilized the Co, Cu and Ni. The reductive dissolution of As-bearing Fe (oxyhydr)oxides and the release of As were documented only in the Fe-rich/organic-low soil. Over the next stage of incubation (similar to 75 days), the exposure and drying of the soils led to the oxidation of the Fe and As sulfides. The arsenic and trace metals released via oxidation of the sulfide phases (particularly Fe sulfides) were almost entirely sequestered by the Fe(III) (oxyhydr)oxides, but acidification during the oxidation stage of the incubation resulted in the pH-dependent release of the As and trace metals (Co, Cu, Ni) (especially in the Fe-rich/organic-low soil). These findings suggest that sulfidic soils in wetlands can be considered as long-term sources of As during major drought events. (C) 2021 Elsevier Ltd. All rights reserved.
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
Chemosphere
ISSN
0045-6535
e-ISSN
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Volume of the periodical
277
Issue of the periodical within the volume
August
Country of publishing house
GB - UNITED KINGDOM
Number of pages
8
Pages from-to
130306
UT code for WoS article
000648342100073
EID of the result in the Scopus database
2-s2.0-85103316558