Large pore diameter MCM-41 and its application for lead removal from aqueous media

Salah A. Idris, Christine M. Davidson, Colm McManamon, Michael A. Morris, Peter Anderson, Lorraine T. Gibson

Research output: Contribution to journalArticle

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Abstract

A room temperature method to create large pore size and pore volume ordered mesoporous silica (MCM-41) is demonstrated. Template removal was achieved with a microwave digestion procedure using a solution of nitric acid and hydrogen peroxide. The silica product exhibited an ordered hexagonal mesostructure, large pore volume (up to 0.99 cm(3)/g), and large pore size (up to 6.74 nm) indicating its potential as a high capacity adsorbent. Surface modification, to enhance the ability of the material to extract potentially toxic metals (PTMs) from water was performed using different amino- and mercapto-functional groups. This paper reports on the extraction of lead ions from aqueous solution to demonstrate the material's significant improvement in adsorption capacity (up to 1000 mu mol g(-1) for lead). Moreover, methods have been developed to regenerate the sorbent allowing 100% recovery of Pb and reuse of the sorbent material in subsequent extractions. The performance of the material was also demonstrated for environmental samples containing relatively high concentrations (ppmv) of mixed metal ions reducing them to lower values (<100 ppbv) indicating that the sorbent may have applicability for environmental remediation of polluted water. (C) 2010 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)898-904
Number of pages7
JournalJournal of Hazardous Materials
Volume185
Issue number2-3
DOIs
Publication statusPublished - 30 Jan 2011

Fingerprint

Multicarrier modulation
Sorbents
Silicon Dioxide
Metals
Ions
Pore size
Nitric Acid
Water
silica
Poisons
Silica
Microwaves
Hydrogen Peroxide
Adsorption
ion
Digestion
Nitric acid
nitric acid
Hydrogen peroxide
Adsorbents

Keywords

  • MCM-41
  • microwave digestion
  • functionalisation
  • Lead
  • sorbent
  • silica
  • adsorption

Cite this

Idris, Salah A. ; Davidson, Christine M. ; McManamon, Colm ; Morris, Michael A. ; Anderson, Peter ; Gibson, Lorraine T. / Large pore diameter MCM-41 and its application for lead removal from aqueous media. In: Journal of Hazardous Materials. 2011 ; Vol. 185, No. 2-3. pp. 898-904.
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Large pore diameter MCM-41 and its application for lead removal from aqueous media. / Idris, Salah A.; Davidson, Christine M.; McManamon, Colm; Morris, Michael A.; Anderson, Peter; Gibson, Lorraine T.

In: Journal of Hazardous Materials, Vol. 185, No. 2-3, 30.01.2011, p. 898-904.

Research output: Contribution to journalArticle

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AU - Idris, Salah A.

AU - Davidson, Christine M.

AU - McManamon, Colm

AU - Morris, Michael A.

AU - Anderson, Peter

AU - Gibson, Lorraine T.

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AB - A room temperature method to create large pore size and pore volume ordered mesoporous silica (MCM-41) is demonstrated. Template removal was achieved with a microwave digestion procedure using a solution of nitric acid and hydrogen peroxide. The silica product exhibited an ordered hexagonal mesostructure, large pore volume (up to 0.99 cm(3)/g), and large pore size (up to 6.74 nm) indicating its potential as a high capacity adsorbent. Surface modification, to enhance the ability of the material to extract potentially toxic metals (PTMs) from water was performed using different amino- and mercapto-functional groups. This paper reports on the extraction of lead ions from aqueous solution to demonstrate the material's significant improvement in adsorption capacity (up to 1000 mu mol g(-1) for lead). Moreover, methods have been developed to regenerate the sorbent allowing 100% recovery of Pb and reuse of the sorbent material in subsequent extractions. The performance of the material was also demonstrated for environmental samples containing relatively high concentrations (ppmv) of mixed metal ions reducing them to lower values (<100 ppbv) indicating that the sorbent may have applicability for environmental remediation of polluted water. (C) 2010 Elsevier B.V. All rights reserved.

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