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

doi:10.1002/elan.201500153

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 journal › Article › peer-review

9 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 language	English (US)
Pages (from-to)	2439-2447
Number of pages	9
Journal	Electroanalysis
Volume	27
Issue number	10
DOIs	https://doi.org/10.1002/elan.201500153
State	Published - Oct 2015

Keywords

Adsorption
Cadmium
Dynamic speciation
Surface complexation modelling
TiO nanoparticles

ASJC Scopus subject areas

Analytical Chemistry
Electrochemistry

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10.1002/elan.201500153

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title = "Adsorption of Cadmium on Titanium Dioxide Nanoparticles in Freshwater Conditions - A Chemodynamic Study",

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.",

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author = "Gon{\c c}alo Vale and Cristiana Franco and Brunnert, {Anna M.} and {dos Santos}, {Margarida M.Correia}",

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AU - Vale, Gonçalo

AU - Franco, Cristiana

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AU - dos Santos, Margarida M.Correia

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AB - 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.

KW - Adsorption

KW - Cadmium

KW - Dynamic speciation

KW - Surface complexation modelling

KW - TiO nanoparticles

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

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Keywords

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