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The Effect of High Selenite and Selenate Concentrations on Ferric Oxyhydroxides Transformation under Alkaline Conditions

Iron-based nanomaterials have high technological impacts on various pro-environmental applications, including wastewater treatment using the co-precipitation method. The purpose of this research was to identify the changes of iron nanomaterial’s structure caused by the presence of selenium, a typica...

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Autores principales: Matulová, Michaela, Bujdoš, Marek, Miglierini, Marcel B., Cesnek, Martin, Duborská, Eva, Mosnáčková, Katarína, Vojtková, Hana, Kmječ, Tomáš, Dekan, Július, Matúš, Peter, Urík, Martin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8466294/
https://www.ncbi.nlm.nih.gov/pubmed/34576122
http://dx.doi.org/10.3390/ijms22189955
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author Matulová, Michaela
Bujdoš, Marek
Miglierini, Marcel B.
Cesnek, Martin
Duborská, Eva
Mosnáčková, Katarína
Vojtková, Hana
Kmječ, Tomáš
Dekan, Július
Matúš, Peter
Urík, Martin
author_facet Matulová, Michaela
Bujdoš, Marek
Miglierini, Marcel B.
Cesnek, Martin
Duborská, Eva
Mosnáčková, Katarína
Vojtková, Hana
Kmječ, Tomáš
Dekan, Július
Matúš, Peter
Urík, Martin
author_sort Matulová, Michaela
collection PubMed
description Iron-based nanomaterials have high technological impacts on various pro-environmental applications, including wastewater treatment using the co-precipitation method. The purpose of this research was to identify the changes of iron nanomaterial’s structure caused by the presence of selenium, a typical water contaminant, which might affect the removal when the iron co-precipitation method is used. Therefore, we have investigated the maturation of co-precipitated nanosized ferric oxyhydroxides under alkaline conditions and their thermal transformation into hematite in the presence of selenite and selenate with high concentrations. Since the association of selenium with precipitates surfaces has been proven to be weak, the mineralogy of the system was affected insignificantly, and the goethite was identified as an only ferric phase in all treatments. However, the morphology and the crystallinity of ferric oxyhydroxides was slightly altered. Selenium affected the structural order of precipitates, especially at the initial phase of co-precipitation. Still, the crystal integrity and homogeneity increased with time almost constantly, regardless of the treatment. The thermal transformation into well crystalized hematite was more pronounced in the presence of selenite, while selenate-treated and selenium-free samples indicated the presence of highly disordered fraction. This highlights that the aftermath of selenium release does not result in destabilization of ferric phases; however, since weak interactions of selenium are dominant at alkaline conditions with goethite’s surfaces, it still poses a high risk for the environment. The findings of this study should be applicable in waters affected by mining and metallurgical operations.
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spelling pubmed-84662942021-09-27 The Effect of High Selenite and Selenate Concentrations on Ferric Oxyhydroxides Transformation under Alkaline Conditions Matulová, Michaela Bujdoš, Marek Miglierini, Marcel B. Cesnek, Martin Duborská, Eva Mosnáčková, Katarína Vojtková, Hana Kmječ, Tomáš Dekan, Július Matúš, Peter Urík, Martin Int J Mol Sci Article Iron-based nanomaterials have high technological impacts on various pro-environmental applications, including wastewater treatment using the co-precipitation method. The purpose of this research was to identify the changes of iron nanomaterial’s structure caused by the presence of selenium, a typical water contaminant, which might affect the removal when the iron co-precipitation method is used. Therefore, we have investigated the maturation of co-precipitated nanosized ferric oxyhydroxides under alkaline conditions and their thermal transformation into hematite in the presence of selenite and selenate with high concentrations. Since the association of selenium with precipitates surfaces has been proven to be weak, the mineralogy of the system was affected insignificantly, and the goethite was identified as an only ferric phase in all treatments. However, the morphology and the crystallinity of ferric oxyhydroxides was slightly altered. Selenium affected the structural order of precipitates, especially at the initial phase of co-precipitation. Still, the crystal integrity and homogeneity increased with time almost constantly, regardless of the treatment. The thermal transformation into well crystalized hematite was more pronounced in the presence of selenite, while selenate-treated and selenium-free samples indicated the presence of highly disordered fraction. This highlights that the aftermath of selenium release does not result in destabilization of ferric phases; however, since weak interactions of selenium are dominant at alkaline conditions with goethite’s surfaces, it still poses a high risk for the environment. The findings of this study should be applicable in waters affected by mining and metallurgical operations. MDPI 2021-09-15 /pmc/articles/PMC8466294/ /pubmed/34576122 http://dx.doi.org/10.3390/ijms22189955 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Matulová, Michaela
Bujdoš, Marek
Miglierini, Marcel B.
Cesnek, Martin
Duborská, Eva
Mosnáčková, Katarína
Vojtková, Hana
Kmječ, Tomáš
Dekan, Július
Matúš, Peter
Urík, Martin
The Effect of High Selenite and Selenate Concentrations on Ferric Oxyhydroxides Transformation under Alkaline Conditions
title The Effect of High Selenite and Selenate Concentrations on Ferric Oxyhydroxides Transformation under Alkaline Conditions
title_full The Effect of High Selenite and Selenate Concentrations on Ferric Oxyhydroxides Transformation under Alkaline Conditions
title_fullStr The Effect of High Selenite and Selenate Concentrations on Ferric Oxyhydroxides Transformation under Alkaline Conditions
title_full_unstemmed The Effect of High Selenite and Selenate Concentrations on Ferric Oxyhydroxides Transformation under Alkaline Conditions
title_short The Effect of High Selenite and Selenate Concentrations on Ferric Oxyhydroxides Transformation under Alkaline Conditions
title_sort effect of high selenite and selenate concentrations on ferric oxyhydroxides transformation under alkaline conditions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8466294/
https://www.ncbi.nlm.nih.gov/pubmed/34576122
http://dx.doi.org/10.3390/ijms22189955
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