Superparamagnetically modified A-type, X-type and CHA-type zeolites with silica-coated Fe3O4 and CoFe2O4 nanoparticles for removal of Sr2+ and Cs+ from radioactively contaminated water

Azusa Ito; Gnanavel Thirunavukkarasu; Joseph A. Hriljac

doi:10.3389/fenvc.2024.1445482

Superparamagnetically modified A-type, X-type and CHA-type zeolites with silica-coated Fe₃O₄ and CoFe₂O₄ nanoparticles for removal of Sr²⁺ and Cs⁺ from radioactively contaminated water

Azusa Ito^*
, Gnanavel Thirunavukkarasu
, Joseph A. Hriljac^*

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

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Abstract

Magnetised zeolite A, zeolite X and Na,K-CHA composites with superparamagnetic nanoparticles of SiO₂-coated Fe₃O₄ or CoFe₂O₄ ferrite spinels were prepared, characterised and tested for ion exchange efficacy. They were synthesised by following three steps, synthesising Fe₃O₄ and CoFe₂O₄ nanoparticles by a solvothermal method, coating the metal oxide particles with SiO₂ by a sol-gel process, and attaching the M_xO_y/SiO₂ onto the zeolites during synthesis. The magnetic zeolites were characterised by X-ray diffraction, X-ray fluorescence spectroscopy, Raman spectroscopy, vibrating sample magnetometry and both scanning and transmission electron microscopy. It was confirmed they had superparamagnetic properties due to successful attachment of the M_xO_y/SiO₂ particles onto the zeolites. Adsorption capacities of Sr²⁺ onto the magnetic zeolite A and zeolite X and Cs⁺ onto the magnetic Na,K-CHA were also evaluated. The results show the M_xO_y/SiO₂ did not block the adsorption sites of the zeolites and the M_xO_y/SiO₂ particles were not detached from the zeolites during the adsorption experiments.

Original language	English
Article number	1445482
Number of pages	19
Journal	Frontiers in Environmental Chemistry
Volume	5
DOIs	https://doi.org/10.3389/fenvc.2024.1445482
Publication status	Published - 26 Sept 2024

Keywords

zeolite
ion exchange
magnetic separation
Cs removal
Sr removal
superparamagnetism

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10.3389/fenvc.2024.1445482Licence: Creative Commons: Attribution (CC BY)

ItoA2024SuperparamagneticallyFinal published version, 7.21 MBLicence: Creative Commons: Attribution (CC BY)

TRANSCEND: Transformative Science and Engineering for Nuclear Decommissioning
Hriljac, J. (Principal Investigator) & Allan, P. (Co-Investigator)
Engineering & Physical Science Research Council
1/10/18 → 30/09/23
Project: Research Councils

Cite this

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title = "Superparamagnetically modified A-type, X-type and CHA-type zeolites with silica-coated Fe3O4 and CoFe2O4 nanoparticles for removal of Sr2+ and Cs+ from radioactively contaminated water",

abstract = "Magnetised zeolite A, zeolite X and Na,K-CHA composites with superparamagnetic nanoparticles of SiO2-coated Fe3O4 or CoFe2O4 ferrite spinels were prepared, characterised and tested for ion exchange efficacy. They were synthesised by following three steps, synthesising Fe3O4 and CoFe2O4 nanoparticles by a solvothermal method, coating the metal oxide particles with SiO2 by a sol-gel process, and attaching the MxOy/SiO2 onto the zeolites during synthesis. The magnetic zeolites were characterised by X-ray diffraction, X-ray fluorescence spectroscopy, Raman spectroscopy, vibrating sample magnetometry and both scanning and transmission electron microscopy. It was confirmed they had superparamagnetic properties due to successful attachment of the MxOy/SiO2 particles onto the zeolites. Adsorption capacities of Sr2+ onto the magnetic zeolite A and zeolite X and Cs+ onto the magnetic Na,K-CHA were also evaluated. The results show the MxOy/SiO2 did not block the adsorption sites of the zeolites and the MxOy/SiO2 particles were not detached from the zeolites during the adsorption experiments.",

keywords = "zeolite, ion exchange, magnetic separation, Cs removal, Sr removal, superparamagnetism",

author = "Azusa Ito and Gnanavel Thirunavukkarasu and Hriljac, \{Joseph A.\}",

year = "2024",

month = sep,

day = "26",

doi = "10.3389/fenvc.2024.1445482",

language = "English",

volume = "5",

journal = "Frontiers in Environmental Chemistry",

issn = "2673-4486",

publisher = "Frontiers Media S.A.",

}

Superparamagnetically modified A-type, X-type and CHA-type zeolites with silica-coated Fe₃O₄ and CoFe₂O₄ nanoparticles for removal of Sr²⁺ and Cs⁺ from radioactively contaminated water. / Ito, Azusa; Thirunavukkarasu, Gnanavel; Hriljac, Joseph A.
In: Frontiers in Environmental Chemistry, Vol. 5, 1445482, 26.09.2024.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Superparamagnetically modified A-type, X-type and CHA-type zeolites with silica-coated Fe3O4 and CoFe2O4 nanoparticles for removal of Sr2+ and Cs+ from radioactively contaminated water

AU - Ito, Azusa

AU - Thirunavukkarasu, Gnanavel

AU - Hriljac, Joseph A.

PY - 2024/9/26

Y1 - 2024/9/26

N2 - Magnetised zeolite A, zeolite X and Na,K-CHA composites with superparamagnetic nanoparticles of SiO2-coated Fe3O4 or CoFe2O4 ferrite spinels were prepared, characterised and tested for ion exchange efficacy. They were synthesised by following three steps, synthesising Fe3O4 and CoFe2O4 nanoparticles by a solvothermal method, coating the metal oxide particles with SiO2 by a sol-gel process, and attaching the MxOy/SiO2 onto the zeolites during synthesis. The magnetic zeolites were characterised by X-ray diffraction, X-ray fluorescence spectroscopy, Raman spectroscopy, vibrating sample magnetometry and both scanning and transmission electron microscopy. It was confirmed they had superparamagnetic properties due to successful attachment of the MxOy/SiO2 particles onto the zeolites. Adsorption capacities of Sr2+ onto the magnetic zeolite A and zeolite X and Cs+ onto the magnetic Na,K-CHA were also evaluated. The results show the MxOy/SiO2 did not block the adsorption sites of the zeolites and the MxOy/SiO2 particles were not detached from the zeolites during the adsorption experiments.

AB - Magnetised zeolite A, zeolite X and Na,K-CHA composites with superparamagnetic nanoparticles of SiO2-coated Fe3O4 or CoFe2O4 ferrite spinels were prepared, characterised and tested for ion exchange efficacy. They were synthesised by following three steps, synthesising Fe3O4 and CoFe2O4 nanoparticles by a solvothermal method, coating the metal oxide particles with SiO2 by a sol-gel process, and attaching the MxOy/SiO2 onto the zeolites during synthesis. The magnetic zeolites were characterised by X-ray diffraction, X-ray fluorescence spectroscopy, Raman spectroscopy, vibrating sample magnetometry and both scanning and transmission electron microscopy. It was confirmed they had superparamagnetic properties due to successful attachment of the MxOy/SiO2 particles onto the zeolites. Adsorption capacities of Sr2+ onto the magnetic zeolite A and zeolite X and Cs+ onto the magnetic Na,K-CHA were also evaluated. The results show the MxOy/SiO2 did not block the adsorption sites of the zeolites and the MxOy/SiO2 particles were not detached from the zeolites during the adsorption experiments.

KW - zeolite

KW - ion exchange

KW - magnetic separation

KW - Cs removal

KW - Sr removal

KW - superparamagnetism

U2 - 10.3389/fenvc.2024.1445482

DO - 10.3389/fenvc.2024.1445482

M3 - Article

SN - 2673-4486

VL - 5

JO - Frontiers in Environmental Chemistry

JF - Frontiers in Environmental Chemistry

M1 - 1445482

ER -

Superparamagnetically modified A-type, X-type and CHA-type zeolites with silica-coated Fe3O4 and CoFe2O4 nanoparticles for removal of Sr2+ and Cs+ from radioactively contaminated water

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Superparamagnetically modified A-type, X-type and CHA-type zeolites with silica-coated Fe₃O₄ and CoFe₂O₄ nanoparticles for removal of Sr²⁺ and Cs⁺ from radioactively contaminated water