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Open Access research with a European policy impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

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Selective extraction of mercury(II) from water samples using mercapto functionalised-MCM-41 and regeneration of the sorbent using microwave digestion

Idris, Salah Ali Mahgoub and Harvey, Sophie R. and Gibson, Lorraine (2011) Selective extraction of mercury(II) from water samples using mercapto functionalised-MCM-41 and regeneration of the sorbent using microwave digestion. Journal of Hazardous Materials, 193. pp. 171-176. ISSN 0304-3894

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Abstract

Silica sorbents, based on mesoporus crystalline material-41 (MCM-41), were functionalized using mercaptopropyl (MP) or diethylenetriamine (DETA) to extract mercury (II) ions from water. MP-MCM-41 was an extremely efficient and selective sorbent for the removal of mercury (II) from samples of distilled water doped with heavy metal ions, tap or river water. DETA-MCM-41 preferentially removed hard metal ions (chromium, manganese, lead and zinc) over soft metal ions such as mercury. During extraction, the influence of pH on adsorption capacity was examined; a maximum adsorption capacity of 1245 μmol g-1 was achieved for MP-MCM-41 even at pH values as low as 3. Significantly, a method has been developed, for the first time, to remove Hg (II) from loaded MP-MCM-41 allowing this analyte to be selectively removed from waters contaminated with a wide range of heavy metal ions. The regeneration method does not disrupt the chelating agent which remains on the surface of the silica permitting reuse of the sorbent in further extractions.