Adsorption of Cadmium on Titanium Dioxide Nanoparticles in Freshwater Conditions – A Chemodynamic Study | Zendy

Vale Gonçalo | Zendy; Franco Cristiana | Zendy; Brunnert Anna M. | Zendy; Correia dos Santos Margarida M. | Zendy

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

Author(s) -

Vale Gonçalo,

Franco Cristiana,

Brunnert Anna M.,

Correia dos Santos Margarida M.

Publication year - 2015

Publication title -

electroanalysis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.574

H-Index - 128

eISSN - 1521-4109

pISSN - 1040-0397

DOI - 10.1002/elan.201500153

Subject(s) - adsorption , stripping (fiber) , cadmium , titanium dioxide , nanoparticle , chemistry , inorganic chemistry , desorption , genetic algorithm , homogeneous , nuclear chemistry , materials science , nanotechnology , metallurgy , organic chemistry , physics , evolutionary biology , composite material , biology , thermodynamics

The adsorption of Cd onto two titanium dioxide nanoparticles (nTiO 2 ) with distinct crystalline phases and sizes was investigated in conditions that can be found in freshwater systems ( I= 0.01 M, pH 6.0–8.5). 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 CdTiO 2 homogeneous and labile surface complexes are formed. To our knowledge this is the first study about the dynamic nature of the nTiO 2 surface complexes formed in the presence of Cd.

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