| Literature DB >> 21481996 |
Céline Botta1, Jérôme Labille, Mélanie Auffan, Daniel Borschneck, Hélène Miche, Martiane Cabié, Armand Masion, Jérôme Rose, Jean-Yves Bottero.
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.Entities:
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Year: 2011 PMID： 21481996 DOI： 10.1016/j.envpol.2011.03.003
Source DB: PubMed Journal: Environ Pollut ISSN： 0269-7491 Impact factor: 8.071