ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
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 www.springerlink.com.
Chemical Papers 62 (3) 255–259 (2008)