Adsorption of Cadmium on Titanium Dioxide Nanoparticles in Freshwater Conditions - A Chemodynamic Study

Gonçalo Vale, Cristiana Franco, Anna M. Brunnert, Margarida M.Correia dos Santos

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

The adsorption of Cd onto two titanium dioxide nanoparticles (nTiO2) with distinct crystalline phases and sizes was investigated in conditions that can be found in freshwater systems (I=0.01M, pH6.0-8.5). Cd dynamic speciation was assessed by two distinct electroanalytical techniques: absence of gradients and nernstian equilibrium stripping (AGNES) and scanned stripping chronopotentiometry (SSCP). With both NPs, 1:1 CdTiO2 homogeneous and labile surface complexes are formed. To our knowledge this is the first study about the dynamic nature of the nTiO2 surface complexes formed in the presence of Cd.

Original languageEnglish (US)
Pages (from-to)2439-2447
Number of pages9
JournalElectroanalysis
Volume27
Issue number10
DOIs
Publication statusPublished - Jan 1 2015

    Fingerprint

Keywords

  • Adsorption
  • Cadmium
  • Dynamic speciation
  • Surface complexation modelling
  • TiO nanoparticles

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry

Cite this