Synthesis and application of hydride silica composites for rapid and facile removal of aqueous mercury
Synthesis and application of hydride silica composites for rapid and facile removal of aqueous mercury
The adsorption of ionic mercury(II) from aqueous solution on functionalized hydride silicon materials was investigated. The adsorbents were prepared by modification of mesoporous silica C-120 with triethoxysilane or by converting alkoxysilane into siloxanes by reaction with acetic acid. Mercury adsorption isotherms at 20?°C are reported, and maximum mercury loadings were determined by Langmuir fitting. Adsorbents exhibited efficient and rapid removal of ionic mercury from aqueous solution, with a maximum mercury loading of approximately 0.22 and 0.43 mmol of Hg g?1 of silica C-120 and polyhedral oligomeric silsesquioxane (POSS) xerogel, respectively. Adsorption efficiency remained almost constant from pH 2.7 to 7. These inexpensive adsorbents exhibiting rapid assembly, low pH sensitivity, and high reactivity and capacity, are potential candidates as effective materials for mercury decontamination in natural waters and industrial effluents.
adsorption, hydride silica, mercury, rapid uptake, water remediation
4126-4133
Katok, Kseniia V.
44b51515-7b87-437f-bcec-e636ae3c9ab0
Whitby, Raymond L. D.
2c4fef7a-ce81-44ea-842e-27dbd56ac5c4
Fayon, Franck
366b7294-0b7c-480f-8f20-b6b688c70c67
Bonnamy, Sylvie
ab857d0e-4d8c-458f-bf98-996434f3bf85
Mikhalovsky, Sergey V.
069cc234-fe97-4055-97ed-5bec73bf8d0d
Cundy, Andrew B.
994fdc96-2dce-40f4-b74b-dc638286eb08
16 December 2013
Katok, Kseniia V.
44b51515-7b87-437f-bcec-e636ae3c9ab0
Whitby, Raymond L. D.
2c4fef7a-ce81-44ea-842e-27dbd56ac5c4
Fayon, Franck
366b7294-0b7c-480f-8f20-b6b688c70c67
Bonnamy, Sylvie
ab857d0e-4d8c-458f-bf98-996434f3bf85
Mikhalovsky, Sergey V.
069cc234-fe97-4055-97ed-5bec73bf8d0d
Cundy, Andrew B.
994fdc96-2dce-40f4-b74b-dc638286eb08
Katok, Kseniia V., Whitby, Raymond L. D., Fayon, Franck, Bonnamy, Sylvie, Mikhalovsky, Sergey V. and Cundy, Andrew B.
(2013)
Synthesis and application of hydride silica composites for rapid and facile removal of aqueous mercury.
ChemPhysChem, 14 (18), .
(doi:10.1002/cphc.201300832).
Abstract
The adsorption of ionic mercury(II) from aqueous solution on functionalized hydride silicon materials was investigated. The adsorbents were prepared by modification of mesoporous silica C-120 with triethoxysilane or by converting alkoxysilane into siloxanes by reaction with acetic acid. Mercury adsorption isotherms at 20?°C are reported, and maximum mercury loadings were determined by Langmuir fitting. Adsorbents exhibited efficient and rapid removal of ionic mercury from aqueous solution, with a maximum mercury loading of approximately 0.22 and 0.43 mmol of Hg g?1 of silica C-120 and polyhedral oligomeric silsesquioxane (POSS) xerogel, respectively. Adsorption efficiency remained almost constant from pH 2.7 to 7. These inexpensive adsorbents exhibiting rapid assembly, low pH sensitivity, and high reactivity and capacity, are potential candidates as effective materials for mercury decontamination in natural waters and industrial effluents.
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Published date: 16 December 2013
Keywords:
adsorption, hydride silica, mercury, rapid uptake, water remediation
Organisations:
Geochemistry
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Local EPrints ID: 399283
URI: http://eprints.soton.ac.uk/id/eprint/399283
ISSN: 1439-4235
PURE UUID: 881af6b0-ef4a-47d2-a300-9f5e18077681
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Date deposited: 10 Aug 2016 12:49
Last modified: 15 Mar 2024 03:52
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Contributors
Author:
Kseniia V. Katok
Author:
Raymond L. D. Whitby
Author:
Franck Fayon
Author:
Sylvie Bonnamy
Author:
Sergey V. Mikhalovsky
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