The role of silver and vanadium release in the toxicity of silver vanadate nanowires toward Daphnia similis

The role of silver and vanadium release in the toxicity of silver vanadate nanowires toward Daphnia similis

Autor Artal, Mariana Coletty Google Scholar
Holtz, Raphael Dias Google Scholar
Kummrow, Fábio Autor UNIFESP Google Scholar
Alves, Oswaldo Luiz Google Scholar
Umbuzeiro, Gisela de Aragao Google Scholar
Instituição Universidade Estadual de Campinas (UNICAMP)
Universidade Federal de São Paulo (UNIFESP)
Resumo Nanomaterials are used in a wide spectrum of applications, including nanowires that are objects with at least one of its dimensions in the range of 1 to 100nm. Recently, a new type of silver vanadate nanowire decorated with silver nanoparticles (SVSN-LQES1) with promising antimicrobial activity against different pathogenic bacteria was described. the objective of the present study was to evaluate the role of silver and vanadium release in the acute toxicity of this material using Daphnia similis. To verify the effect of the presence of the nanowires in the test solution, tests were performed before and after filtration. Total silver release to the testing media was determined using the method of inductively coupled plasma atomic emission spectroscopy (ICP-AES). Silver vanadate nanowires decorated with silver nanoparticles (SVSN-LQES1) are acutely toxic to D. similis. the release of silver from the nanomaterial trapped in the gut along with the silver released to the test media seems to be responsible for the observed toxicity. Although toxic to Daphnia, vanadium does not contribute to the toxicity of SVSN-LQES1. the observed increase in lipid droplets appears to be related to the exposure of the organisms to the nanomaterials, but the significance of this response needs further investigation. Environ. Toxicol. Chem. 2013;32:908912. (c) 2013 SETAC
Palavra-chave SVSN-LQES1
Silver vanadate nanowires
Ecotoxicity
Nanomaterials
Daphnia similis
Idioma Inglês
Financiador Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Número do financiamento FAPESP: 2008/57974-9
Data de publicação 2013-04-01
Publicado em Environmental Toxicology and Chemistry. Hoboken: Wiley-Blackwell, v. 32, n. 4, p. 908-912, 2013.
ISSN 0730-7268 (Sherpa/Romeo, fator de impacto)
Publicador Wiley-Blackwell
Extensão 908-912
Fonte http://dx.doi.org/10.1002/etc.2128
Direito de acesso Acesso aberto Open Access
Tipo Artigo
Web of Science WOS:000316621700024
Endereço permanente http://repositorio.unifesp.br/handle/11600/36107

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