The effect of high selenite and selenate concentrations on ferric oxyhydroxides transformation under alkaline conditions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27350%2F21%3A10247926" target="_blank" >RIV/61989100:27350/21:10247926 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/21:10439560 RIV/68407700:21340/21:00351509

Result on the web

<a href="https://www.mdpi.com/1422-0067/22/18/9955" target="_blank" >https://www.mdpi.com/1422-0067/22/18/9955</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/ijms22189955" target="_blank" >10.3390/ijms22189955</a>

Result language

angličtina

Original language name

The effect of high selenite and selenate concentrations on ferric oxyhydroxides transformation under alkaline conditions

Original language 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&apos;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&apos;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.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20703 - Mining and mineral processing

Project

<a href="/en/project/EF16_019%2F0000778" target="_blank" >EF16_019/0000778: Center for advanced applied science</a><br>

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2021

Confidentiality

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

Name of the periodical

International Journal of Molecular Sciences

ISSN

1661-6596

e-ISSN

—

Volume of the periodical

22

Issue of the periodical within the volume

18

Country of publishing house

CH - SWITZERLAND

Number of pages

19

Pages from-to

9955

UT code for WoS article

000699785900001

EID of the result in the Scopus database

2-s2.0-85114862655