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Istituto di ricerche sulla combustione
Soppresso il 01/10/2020

Torna all'elenco Contributi in rivista anno 2020

Contributo in rivista

Tipo: Articolo in rivista

Titolo: On the modeling of heavy metals and rare earth elements adsorption on colloidal carbon-based nanoparticles

Anno di pubblicazione: 2020

Formato: Elettronico

Autori: Manfredi C.; Mozzillo R.; Volino S.; Trifuoggi M.; Giarra A.; Gargiulo V.; Alfe M.

Affiliazioni autori: Department of Chemical Sciences, University of Naples Federico II, Via Cintia, I-80126 Naples, Department of Chemical Sciences, University of Naples Federico II, Via Cintia, I-80126 Naples, Italy, , Italy; Institute for Research on Combustion (IRC)-CNR, P.le V. Tecchio 80, Naples, Institute for Research on Combustion (IRC)-CNR, P.le V. Tecchio 80, Naples, Italy, , Italy

Autori CNR:

  • MICHELA ALFE'
  • VALENTINA GARGIULO

Lingua: inglese

Abstract: Acid-base and metal ions adsorptive properties of colloidal carbon-based nanostructured materials, bearing a variable number of oxygen-containing functional groups at the surface, were investigated and modeled. Hydrophilic carbonaceous nanoparticles (HNPs) with uniform dimensions and a good grade of dispersion in water, were obtained through the oxidation of a carbon black with nitric acid, at a temperature of 100 C, for different reaction times (2-24 h). The acid-base properties of the functional groups were evaluated in water suspension by potentiometry and infrared spectroscopy. By means of X-ray fluorescence, infrared spectroscopy and differential pulse voltammetry the interaction properties of HNPs with Cd, Zn, Pb and selected Ln ions have also been investigated. The experimental data, collected in the 2.0-7.0 pH range, suggest that the adsorption of metal ions on HNPs is controlled by chemical adsorption involving the strong complexation of metal ions with the carboxylic groups on the surface of HNPs. Particularly, the high complexation of Ln ions opens the exploitation of HNPs in solid phase extraction for preconcentration, separation and determination of rare earth elements and actinides.

Lingua abstract: inglese

Pagine totali: 9

Rivista:

Applied surface science North-Holland
Paese di pubblicazione: Paesi Bassi
Lingua: inglese
ISSN: 0169-4332

Numero volume: 505

DOI: 10.1016/j.apsusc.2019.144264

Referee: S: Internazionale

Stato della pubblicazione: Published version

Indicizzato da: Scopus [2-s2.0-85075527396]

Parole chiave:

  • Oxidized carbon black
  • Colloidal nanoparticles
  • Acid-base properties
  • Rare earth elements
  • Metal ions adsorption
  • Surface complexation model

URL: http://www.scopus.com/record/display.url?eid=2-s2.0-85075527396&origin=inward

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