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Dissolution of metal and metal oxide nanoparticles in aqueous media.
Journal article

Dissolution of metal and metal oxide nanoparticles in aqueous media.

  • Odzak N Eawag, Swiss Federal Institute of Aquatic Science & Technology, Department Environmental Toxicology (Utox), Ueberlandstrasse 133, 8600 Dübendorf, Switzerland. Electronic address: odzak@eawag.ch.
  • Kistler D Eawag, Swiss Federal Institute of Aquatic Science & Technology, Department Environmental Toxicology (Utox), Ueberlandstrasse 133, 8600 Dübendorf, Switzerland.
  • Behra R Eawag, Swiss Federal Institute of Aquatic Science & Technology, Department Environmental Toxicology (Utox), Ueberlandstrasse 133, 8600 Dübendorf, Switzerland.
  • Sigg L Eawag, Swiss Federal Institute of Aquatic Science & Technology, Department Environmental Toxicology (Utox), Ueberlandstrasse 133, 8600 Dübendorf, Switzerland.
  • 2014-05-17
Published in:
  • Environmental pollution (Barking, Essex : 1987). - 2014
Carbon coated copper
Copper oxide
DGT
Dialysis membrane
Nanoparticles dissolution
Silver
Ultrafiltration
Zinc oxide
Carbon
Chitosan
Citrates
Copper
Diffusion
Gelatin
Metal Nanoparticles
Povidone
Silver
Solubility
Ultrafiltration
Water
Water Pollutants, Chemical
Zinc Oxide
English The dissolution of Ag (citrate, gelatin, polyvinylpyrrolidone and chitosan coated), ZnO, CuO and carbon coated Cu nanoparticles (with two nominal sizes each) has been studied in artificial aqueous media, similar in chemistry to environmental waters, for up to 19 days. The dissolved fraction was determined using DGT (Diffusion Gradients in Thin films), dialysis membrane (DM) and ultrafiltration (UF). Relatively small fractions of Ag nanoparticles dissolved, whereas ZnO dissolved nearly completely within few hours. Cu and CuO dissolved as a function of pH. Using DGT, less dissolved Ag was measured compared to UF and DM, likely due to differences in diffusion of organic complexes. Similar dissolved metal concentrations of ZnO, Cu and CuO nanoparticles were determined using DGT and UF, but lower using DM. The results indicate that there is a need to apply complementary techniques to precisely determine dissolution of nanoparticles in aqueous media.
Language
  • English
Open access status
closed
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https://sonar.ch/global/documents/209960
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