Leaching of nanoparticles from experimental water-borne paints under laboratory test conditions

  • Stefano Zuin
  • Marco Gaiani
  • Arlen Ferrari
  • Luana Golanski
Research Paper

Abstract

In this study we investigated the release of titanium dioxide (TiO2), silver (Ag) and silica (SiO2) engineered nanoparticles (ENPs) from three different paints by using standardized water immersion test for coatings. Fibre-cement panels were coated with paints containing ENPs and then exposed to UV light and abraded to simulate weathering. After the static water immersion test, we observed a very low release of Ti (4–8 μg/l), while the Ag measured in leachates was under detection limit (0.1 μg/l). A small release of Si was measured in leachates, with 73 mg/l of Si released from paints containing SiO2 ENPs after 120 h of water immersion. The cumulative loss of Si was about 1.8 % with respect to initial amount of Si in paint. Microscopic results highlighted that SiO2 ENPs are mainly released in form of agglomerates with other particles, and only very few single SiO2 ENPs were found in leachates. The results confirmed that Si migration is related to immersion cycles (wetting and drying cycles) of tested paints.

Keywords

Engineered nanoparticles Façade coatings Leaching test Nanomaterials release Water-based paints Exposure Environmental and health effects 

Supplementary material

11051_2013_2185_MOESM1_ESM.docx (1.1 mb)
Supplementary material 1 (DOCX 1077 kb)

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Stefano Zuin
    • 1
  • Marco Gaiani
    • 1
  • Arlen Ferrari
    • 2
  • Luana Golanski
    • 3
  1. 1.Venice Research ConsortiumVeniceItaly
  2. 2.GFC Chimica s.r.l.FerraraItaly
  3. 3.CEA Commissariat à l’Energie Atomique et aux Energies AlternativesGrenobleFrance

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