Design of Mg-Al-CO3 layered double hydroxides (LDHs) which are capable to remove aqueous selenate (SeO42-) and selenite (HSeO3-) via direct exchange of the interlayer anions

Ecology and sustainable development. Environmental protection

3rd International Scientific Conference «Chemical Technology and Engineering»: Proceedings – June 21–24th, 2021, Lviv, Ukraine – Lviv: Lviv Polytechnic National University, 2021, pp. 211–218

DOI: https://doi.org/10.23939/cte2021.01.211

Authors

First and Last Name	Academic degree	E-mail	Affiliation
Natalia Chubar	Ph.D.	natalia.chubar [at] gmail.com	Utrecht University Utrecht, Netherlands
Małgorzata Szlachta	Ph.D.	malgorzata.szlachta [at] gtk.fi	Geological Survey of Finland Espoo, Finland Utrecht University Espoo, Finland
Vasyl Gerda	Ph.D.	vgerda [at] univ.kiev.ua	Taras Shevchenko National University of Kyiv Kyiv, Ukraine Utrecht University Kyiv, Ukraine
Matej Mičušík	Ph.D.	Matej.Micusik [at] savba.sk	Polymer Institute Bratislava, Slovakia
Maria Omastova	Sc.D.	Maria.Omastova [at] savba.sk	Polymer Institute Bratislava, Slovakia

I and my co-authors (if any) authorize the use of the Paper in accordance with the Creative Commons CC BY license

First published on this website: 30.04.2021 - 11:14

Abstract

In this work we present the knowledge-based preparation method of Mg-Al layered double hydroxides with predefined properties, purely inorganic synthesis with a step of sol-gel routes. Difference in sorption mechanisms of Se(VI) and Se(IV) was revealed by XPS, EXAFS, FTIR. The removal efficiency was confirmed under static and dynamic conditions.

Keywords

layered double hydroxides (LDHs)fine inorganic synthesis sol-gel routes selenate selenite batch sorption column sorption experiments x-ray photoelectron spectroscopy (XPS)extended x-ray absorption fine structure (EXAFS)Fourier transform-infrared (FTIR) spectroscopy.

References

Chubar, N. (2011). New inorganic (an)ion exchangers based on Mg–Al hydrous oxides: (Alkoxide-free) sol–gel synthesis and characterization. Journal of Colloid and Interface Science, 357, 198-209, http://doi: 10.1016/j.jcis.2011.01.098
Chubar, N. (2011). New inorganic (an)ion exchangers with a higher affinity for arsenate and a competitive removal capacity towards fluoride, bromate, bromide, selenate, selenite, arsenite and borate. Water Science & Technology Water Supply, 5, 505-515, https://doi.org/10.2166/ws.2011.080
Chubar, N., Gerda, V., Megantari, O., Mičušík, M., Omastova, M., Heister, K., Man, P., Fraissard, J. (2013). Applications vs properties of Mg-Al layered double hydroxides provided by their syntheses methods: alkoxide and alkoxide-free sol-gel syntheses and hydrothermal precipitation. Chemical Engineering Journal, 234, 284-299, https://doi.org/10.1016/j.cej.2013.08.097
Chubar, N. (2014). EXAFS and FTIR studies of selenite and selenate sorption by alkoxide-free sol-gel generated Mg-Al-CO3 layered double hydroxide with very labile interlayer anions. Journal of Materials Chemistry A, 2, 15995–16007, https://doi.org/10.1039/C4TA03463E
Chubar, N. & Szlachta, M. (2015). Static and dynamic adsorptive removal of selenite and selenate by alkoxide-free sol-gel generated Mg-Al-CO3 layered double hydroxide: Effect of competing ions. Chemical Engineering Journal, 279, 885–896. https://doi.org/10.1016/j.cej.2015.05.070
Chubar, N., Gilmour, R., Gerda, V., Mičušík, M., Omastova, M., Heister, K., Man, P., Fraissard, F., Zaitsev, V. (2017) Layered double hydroxides as the next generation anion exchangers: Synthetic method versus applicability (a review). Advances in Colloid and Interface Science, 245, 62-80, http://doi: 10.1016/j.cis.2017.04.013
Chubar, N. (2018). The Influence of sulfate on selenate sorption on Mg-Al-CO3 layered double hydroxides prepared by fine Inorganic sol-gel gynthesis studied by x-ray photoelectron spectroscopy. Applied Surface Science, 459, 281–291,doi.org/10.1016/j.apsusc.2018.07.193

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