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New Approach to Synthesis of Silica with Chemically Bound Guanidine Hydrochloride for Preconcentration of Metal Ions
Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, Kyiv, Ukraine
Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, Kyiv, Ukraine
Chemistry Department of Kyiv National Taras Shevchenko University, Kyiv, Ukraine
Ukrainian State University of Chemical Engineering, Dnipropetrovs’k, Ukraine
- 1 Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, Kyiv, Ukraine
- 2 Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, Kyiv, Ukraine
- 3 Chemistry Department of Kyiv National Taras Shevchenko University, Kyiv, Ukraine
- 4 Ukrainian State University of Chemical Engineering, Dnipropetrovs’k, Ukraine
American Journal of Analytical Chemistry·Volume 07 (2016)·Pages 411–420·Published 6 May 2016·DOI10.4236/ajac.2016.75038
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Abstract
Guanidine hydrochloride was chemically bonded to surface of modified silica by means of condensation with grafted amino groups. Ion-exchanging and complexing properties of the obtained adsorbent have been studied with respect to cations of Zn(II), Cu(II), Pb(II), Cd(II), Co(II) and metal-containing oxoanions of W(VI), Mo(VI), Cr(VI), V(V). Optimum conditions for quantitative extraction of the studied ions were determined. The structure and composition of Co(II) and Cu(II) complexes on the surface of the synthesized adsorbent have been investigated. The possibility of quantitative determination of cobalt(II) and copper(II) trace amounts after their preconcentration by the synthesized adsorbent was demonstrated.
KeywordsSilicaGuanidine HydrochlorideImmobilizationAdsorptionCations and Oxoanions of Transition Metals
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