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 synthesissol-gel routesselenateselenitebatch sorptioncolumn sorption experimentsx-ray photoelectron spectroscopy (XPS)extended x-ray absorption fine structure (EXAFS)Fourier transform-infrared (FTIR) spectroscopy.
References
  1. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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 
  7. 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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