Abstract
A novel, efficient, highly stable, and reusable organic inorganic hybrid material was synthesized via silanization of silica gel with (3-aminopropyl)trimethoxysilane followed by covalent immobilization with diacetylmonoxime. The grafting was confirmed by FTIR, elemental analysis, 13C CPMAS NMR spectroscopy, SEM, TGA, and BET surface area analysis. The modified solid phase was found to be highly selective for Cu(II) ions under near neutral conditions with a high sorption capacity of 0.93 mmol·g−1 and a preconcentration factor of 250. Isotherm and kinetic parameters correlated well with the Langmuir and pseudo-second-order model. The recovery of analyte was efficiently performed for ten consecutive adsorption-desorption cycles. The present environmentally benign and economical procedure was successfully applied for the separation and preconcentration of copper from fly ash ameliorated soil samples.
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