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Extraction of copper ions using silica gel with chemically modified surface

Iwona Rykowska, Wiesław Wasiak, and Joanna Byra

Faculty of Chemistry, Adam Mickiewicz University, ul. Grunwaldzka 6, 607 80 Poznań, Poland



Received: 30 March 2007  Revised: 10 September 2007  Accepted: 25 September 2007

Abstract: The applicability of silica gels for the application in solid-phase extraction was tested. Silica was modified with ketoimine groups. Surface characteristics of the modified silica were determined by elemental analysis, NMR spectra of solid phases (29Si CP MAS NMR), analysis of pore size distribution of the silica support, and nitrogen adsorption-desorption. Newly proposed sorbents with ketoimine groups were applied in the preconcentration of trace amounts of the Cu (II) ions from lake water, post-industrial water, and demineralized water unburdened back to the lake.

Keywords: silica gel - cooper ions - solid-phase extraction - ketoimine groups

Full paper is available at

DOI: 10.2478/s11696-008-0020-4


Chemical Papers 62 (3) 255–259 (2008)

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