TiO2-based nanoparticles released in water from commercialized sunscreens in a life-cycle perspective: Structures and quantities - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Environmental Pollution Année : 2011

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

Martiane Cabié

Résumé

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.

Dates et versions

hal-01426200 , version 1 (04-01-2017)

Identifiants

Citer

Céline Botta, Jérôme 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, 2011, 159 (6), pp.1543-1548. ⟨10.1016/j.envpol.2011.03.003⟩. ⟨hal-01426200⟩
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