Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Stability of naturally occurring AMD–schwertmannite in the presence of arsenic and reducing agents
CRETUS-Institute, Cross-disciplinary Research in Environmental Technologies, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain.
CRETUS-Institute, Cross-disciplinary Research in Environmental Technologies, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain Department of Physical Chemistry, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering. Department of Earth System Science, School of Earth, Energy, and Environmental Sciences, Stanford University, Stanford, CA 94305, USA.ORCID iD: 0000-0003-4292-6752
Department of Physical Chemistry, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain.
Show others and affiliations
2021 (English)In: Journal of Geochemical Exploration, ISSN 0375-6742, E-ISSN 1879-1689, Vol. 220, article id 106677Article in journal (Refereed) Published
Abstract [en]

Secondary iron oxides formed in acid mine drainage, such as schwertmannite, are scavengers for metal(loid)s in mining environments. Increasing the understanding of the geochemical transformations of these minerals, as well as knowing how metal(loid)s affect these transformations, is crucial to ultimately predict the fate of these trace elements in acidic mine drainage and to minimize the potential environmental risk. In this study, transformation experiments have been conducted with a schwertmannite-rich sediment collected from a mining area and with synthesized schwertmannite as a reference material. The transformation of schwertmannite into goethite was studied as a function of the presence of arsenic, pH value, and redox conditions. Arsenic delayed the mineral transformation from pseudo-stable amorphous phases to more stable crystalline forms, especially at higher arsenic loadings and more acidic pH. Experiments in the presence of Fe(II) and ascorbic acid have proven that both components promote the mineral transformation or reductive dissolution of schwertmannite under anoxic conditions. The presence of arsenic reduced the catalytic effect of Fe(II), stabilizing the schwertmannite particles. On the other hand, arsenic had no effect on the reductive dissolution at these conditions when ascorbic acid was used as a reducing agent. © 2020 Elsevier B.V.

Place, publisher, year, edition, pages
Elsevier, 2021. Vol. 220, article id 106677
Keywords [en]
Arsenic, Dissolution, Drainage, Iron oxides, Minerals, Nanocrystalline materials, Reducing agents, Trace elements, Acid mine drainage, Acidic mine drainage, Environmental risks, Geochemical transformations, Mineral transformations, Mining environments, Naturally occurring, Reductive dissolution, Ascorbic acid, Lethrinidae
National Category
Other Environmental Engineering
Research subject
Waste Science and Technology
Identifiers
URN: urn:nbn:se:ltu:diva-81358DOI: 10.1016/j.gexplo.2020.106677ISI: 000594240000007Scopus ID: 2-s2.0-85094974866OAI: oai:DiVA.org:ltu-81358DiVA, id: diva2:1499752
Note

Validerad;2021;Nivå 2;2021-01-11 (johcin)

Available from: 2020-11-10 Created: 2020-11-10 Last updated: 2021-01-11Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records

Carabante, IvanJosevska, NatashaProtopapa, ChloeKumpiene, Jurate

Search in DiVA

By author/editor
Carabante, IvanJosevska, NatashaProtopapa, ChloeKumpiene, Jurate
By organisation
Geosciences and Environmental Engineering
In the same journal
Journal of Geochemical Exploration
Other Environmental Engineering

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 477 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf