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

Levak, Maja; Burić, Petra; Dutour Sikirić, Maja; Domazet Jurašin, Darija; Mikac, Nevenka; Bačić, Niko; Drexel, Roland; Meier, Florian; Jakšić, Željko; Lyons, Daniel Mark (2017) Effect of protein corona on silver nanoparticle stabilization and ion release kinetics in artificial seawater. Environmental Science and Technology, 51 (3). pp. 1259-1266. ISSN 0013-936X

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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.

Item Type: Article
Additional Information: The research leading to these results has received funding from the Seventh Framework Programme of the European Union under grant agreement no. FP7-NMP-2011-SME-5-280779 (SmartNano). Support from EU COST Action ES1205 ENTER is gratefully acknowledged.
Uncontrolled Keywords: marine ; estuarine ; wastewater ; nanoparticle ; silver ; biocorona ; stability ; toxicity
Subjects: NATURAL SCIENCES > Chemistry
NATURAL SCIENCES > Interdisciplinary Natural Sciences
NATURAL SCIENCES > Interdisciplinary Natural Sciences > Marine Science
Divisions: Center for Marine Research
Project titleProject leaderProject codeProject type
Sensitive MeAsuRemenT, detection, and identification of engineered NANOparticles in complex matrices-SMART-NANOUNSPECIFIED280779EK
Depositing User: Maja Levak Zorinc
Date Deposited: 20 Nov 2018 12:54
DOI: 10.1021/acs.est.6b03161

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