Heavy metal pollution is one of the most relevant environmental problems today. Carbon nanotubes (CNT), due to their unique chemical and physical and mechanical properties, show a unique impact on the fast adsorption and rapid removal of hazardous substances from aqueous media. In order to improve their chelating ability towards toxic metal ions, multiwalled carbon nanotubes (MWCNT) have been functionalized with triazole based dendrimers which were built directly onto the CNT surface by click chemistry reactions, affording the MWCNT-TD chelating system. The Moedritzer-Irani reaction performed on the exposed amine groups of MWCNT-TD afforded to the corresponding a-aminophosphonate chelating system MWCNT-TDP. Both nanosystems have been characterized by physical, chemical, and morphological analyses and their chelating abilities towards mercury and lead ions have been experimentally evaluated ICP-MS analyses. The complexation mode of the best chelating system MWCNT-TDP with mercury, was investigated by DFT calculations.
HEAVY METAL IONS REMOVAL BY CNT/DENDRIMER HYBRIDS
IANNAZZO, Daniela;PISTONE, Alessandro;ZICCARELLI, IDA;GALVAGNO, Signorino;GIOFRE', Salvatore Vincenzo;ROMEO, Roberto;CICERO, Nicola;BUA, GIUSEPPE DANIEL;
2017-01-01
Abstract
Heavy metal pollution is one of the most relevant environmental problems today. Carbon nanotubes (CNT), due to their unique chemical and physical and mechanical properties, show a unique impact on the fast adsorption and rapid removal of hazardous substances from aqueous media. In order to improve their chelating ability towards toxic metal ions, multiwalled carbon nanotubes (MWCNT) have been functionalized with triazole based dendrimers which were built directly onto the CNT surface by click chemistry reactions, affording the MWCNT-TD chelating system. The Moedritzer-Irani reaction performed on the exposed amine groups of MWCNT-TD afforded to the corresponding a-aminophosphonate chelating system MWCNT-TDP. Both nanosystems have been characterized by physical, chemical, and morphological analyses and their chelating abilities towards mercury and lead ions have been experimentally evaluated ICP-MS analyses. The complexation mode of the best chelating system MWCNT-TDP with mercury, was investigated by DFT calculations.Pubblicazioni consigliate
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