Bioaccumulation and in vivo formation of titanium dioxide nanoparticles in edible mussels

Federica Gallocchio*, Giancarlo Biancotto, Alessandra Moressa, Francesco Pascoli, Tobia Pretto, Anna Toffan, Giuseppe Arcangeli, Francesco Montesi, Ruud Peters, Antonia Ricci

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)


The aim of this study was to evaluate the bioaccumulation of titanium dioxide nanoparticles (TiO2NPs) in edible mussels bred in polluted artificial seawater. An in vivo study was conducted by exposing mussels to different concentrations of TiO2NPs (0.25 mg/L and 2.5 mg/L) or ionic titanium (1.6 mg/L) for 4 days. Inductively coupled plasma mass spectrometry (ICP-MS) showed titanium presence in all groups proportional to exposure levels (concentration range: 209–1119 µg/kg). Single particle ICP-MS revealed NPs in both TiO2NP treated mussels (concentration range: 231–1778 µg/kg) and in ionic titanium treated mussels (concentration 1574 µg/kg), suggesting potential nanoparticle formation in vivo. These results were confirmed by transmission electron microscopy with energy dispersive X-ray detection. Nonetheless, mussels eliminated more than 70% of the TiO2NPs after 3 days’ depuration. These results show the potential for consumer exposure to TiO2NPs when contaminated mussels are consumed without a proper depuration process.

Original languageEnglish
Article number126841
JournalFood Chemistry
Publication statusPublished - 1 Sep 2020


  • Edible mussels
  • Mytilus galloprovincialis
  • Nanoparticles
  • spICP-MS


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