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.
- Dynamic speciation
- Surface complexation modelling
- TiO nanoparticles
ASJC Scopus subject areas
- Analytical Chemistry