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TiO2-based nanoparticles released in water from commercialized sunscreens in a life-cycle perspective: Structures and quantities

Abstract : This work investigates the physical-chemical evolution during artificial aging in water of four commercialized sunscreens containing TiO2-based nanocomposites. Sunscreens were analyzed in terms of mineralogy and TiO2 concentration. The residues formed after aging were characterized in size, shape, chemistry and surface properties. The results showed that a significant fraction of nano-TiO2 residues was released from all sunscreens, despite their heterogeneous behaviors. A stable dispersion of submicronic aggregates of nanoparticles was generated, representing up to 38 w/w% of the amount of sunscreen, and containing up to 30% of the total nano-TiO2 initially present in the creams. The stability of the dispersion was tested as a function of salt concentration, revealing that in seawater conditions, a major part of these nano-TiO2 residues will aggregate and sediment. These results were put in perspective with consumption and life cycle of sunscreens to estimate the amount of nano-TiO2 potentially released into AQUATIC environment. (C) 2011 Elsevier Ltd. All rights reserved.
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https://hal.archives-ouvertes.fr/hal-01426200
Contributor : Perrine Chaurand <>
Submitted on : Wednesday, January 4, 2017 - 12:06:51 PM
Last modification on : Saturday, September 19, 2020 - 4:36:02 AM

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Céline Botta, Jerome Labille, Melanie Auffan, Daniel Borschneck, Helene Miche, et al.. TiO2-based nanoparticles released in water from commercialized sunscreens in a life-cycle perspective: Structures and quantities. Environmental Pollution, Elsevier, 2011, 159 (6), pp.1543-1548. ⟨10.1016/j.envpol.2011.03.003⟩. ⟨hal-01426200⟩

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