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Effects of alginate on stability and ecotoxicity of nano-TiO2 in artificial seawater.
Callegaro, Sarah; Minetto, Diego; Pojana, Giulio; Bilanicová, Dagmar; Libralato, Giovanni; Volpi Ghirardini, Annamaria; Hassellöv, Martin; Marcomini, Antonio.
Afiliación
  • Callegaro S; Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari Venice, Calle Larga Santa Marta, 2137/b, I-30121 Venice, Italy.
  • Minetto D; Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari Venice, Calle Larga Santa Marta, 2137/b, I-30121 Venice, Italy.
  • Pojana G; Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari Venice, Calle Larga Santa Marta, 2137/b, I-30121 Venice, Italy.
  • Bilanicová D; Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari Venice, Calle Larga Santa Marta, 2137/b, I-30121 Venice, Italy.
  • Libralato G; Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari Venice, Calle Larga Santa Marta, 2137/b, I-30121 Venice, Italy.
  • Volpi Ghirardini A; Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari Venice, Calle Larga Santa Marta, 2137/b, I-30121 Venice, Italy.
  • Hassellöv M; Department of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen 4, 412 96 Gothenburg, Sweden.
  • Marcomini A; Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari Venice, Calle Larga Santa Marta, 2137/b, I-30121 Venice, Italy. Electronic address: marcom@unive.it.
Ecotoxicol Environ Saf ; 117: 107-14, 2015 Jul.
Article en En | MEDLINE | ID: mdl-25841066
The large-scale use of titanium dioxide nanoparticles (nano-TiO2) in consumer and industrial applications raised environmental health and safety concerns. Potentially impacted ecosystems include estuarine and coastal organisms. Results from ecotoxicological studies with nano-TiO2 dispersed in salt exposure media are difficult to interpret due to fast flocculation and sedimentation phenomena affecting the dispersion stability. The goal of this study was to investigate the stabilisation effect of alginate on uncoated nano-Ti22 in artificial seawater dispersions used in ecotoxicity bioassays. The most effective stabilisation was obtained at alginate concentration of 0.45 g/L after sonicating dispersions for 20 min (100 W). The size distribution remained constant after re-suspension, indicating that no agglomeration occurred after deposition. Ecotoxicity tests on Artemia franciscana and Phaeodactylum tricornutum did not show any adverse effects related to the presence of alginate in the exposure media, and provided evidence on possible reduced bioavailability of nano-TiO2. The suitable concentration of alginate is recommended to occur on a case-by-case basis.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Titanio / Pruebas de Toxicidad / Alginatos / Nanopartículas / Ecotoxicología Tipo de estudio: Evaluation_studies Límite: Animals Idioma: En Revista: Ecotoxicol Environ Saf Año: 2015 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Países Bajos
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Titanio / Pruebas de Toxicidad / Alginatos / Nanopartículas / Ecotoxicología Tipo de estudio: Evaluation_studies Límite: Animals Idioma: En Revista: Ecotoxicol Environ Saf Año: 2015 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Países Bajos