Naslov
Effect of protein corona on silver nanoparticle stabilization and ion release kinetics in artificial seawater

Autori
Levak, Maja ; Burić, Petra ; Dutour Sikirić, Maja ; Domazet Jurašin, Darija ; Mikac, Nevenka ; Bačić, Niko ; Drexel, Roland ; Meier, Florian ; Jakšić, Željko ; Lyons, Daniel Mark

Izvornik
Environmental science & technology (0013-936X) 51 (2017), 3; 1259-1266

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
marine ; estuarine ; wastewater ; nanoparticle ; silver ; biocorona ; stability ; toxicity

Sažetak
In parallel with the growing use of nanoparticle containing products, their release into the environment over the coming years is expected to increase significantly. With many large population centers located in near- coastal areas, and increasing evidence that various nanoparticles may be toxic to a range of organisms, biota in estuarine and coastal waters may be particularly vulnerable. While size effects may be important in cases, silver nanoparticles have been found to be toxic in large part due to their release of silver ions. However, there is relatively little data available on how nanoparticle coatings can affect silver ion release in estuarine or marine waters. We have found that albumin, as a model for biocorona-forming macromolecules which nanoparticles may encounter in wastewater streams, stabilizes silver colloids from agglomeration in high salinity marine waters by electrosteric repulsion for long time periods. A minimum mass ratio of about 130 for albumin:silver nanoparticles (40 nm) was required for stable dispersion in seawater. Increasing albumin concentration was also found to reduce dissolution of nanoparticles in seawater with up to 3.3 times lower concentrations of silver ions noted. Persistent colloids and slow sustained ion release may have important consequences for biota in these environmental compartments.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Biologija

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