Data/hora: 01/06/2024 05:33:01

Provedor de dados: 	5	
País: 	France	
Título: 	Development of a reference artificial sediment for chemical testing adapted to the MELA sediment contact assay	
Autores: 	Le Bihanic, Florane; Perrichon, Prescilla; Landi, Laure; Clerandeau, Christelle; Le Menach, Karyn; Budzinski, Helene; Cousin, Xavier; Cachot, Jerome.	
Data: 	2014-12	
Ano: 	2014	
Palavras-chave: 	Artificial sediment; Spiked sediment; PAHs; Japanese medaka embryos; Embryotoxicity; Teratogenicity.	
Resumo: 	Most persistent organic pollutants, due to their hydrophobic properties, accumulate in aquatic sediments and represent a high risk for sediment quality. To assess the toxicity of hydrophobic pollutants, a novel approach was recently proposed as an alternative to replace, refine and reduce animal experimentation: the medaka embryo–larval sediment contact assay (MELAc). This assay is performed with Japanese medaka embryos incubated on a natural sediment spiked with the compound being tested. With the aim of improving this assay, our study developed a reference exposure protocol with an artificial sediment specifically designed to limit natural sediment composition uncertainties and preparation variability. The optimum composition of the new artificial sediment was tested using a model polycyclic aromatic hydrocarbon (PAH), fluoranthene. The sediment was then validated with two other model PAHs, benz[a]anthracene and benzo[a]pyrene. Various developmental end points were recorded, including survival, embryonic heartbeat, hatching delay, hatching success, larval biometry and abnormalities. The final artificial sediment composition was set at 2.5 % dry weight (dw) Sphagnum peat, 5 % dw kaolin clay and 92.5 % dw silica of 0.2- to 0.5-mm grain size. In contrast with natural sediments, the chemical components of this artificial matrix are fully defined and readily identifiable. It is totally safe for fish embryos and presents relatively high sorption capacities for hydrophobic compounds. Studies with other hydrophobic and metallic contaminants and mixtures should be performed to further validate this artificial sedimen	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/00187/29872/28479.pdf

DOI:10.1007/s11356-014-2607-3

http://archimer.ifremer.fr/doc/00187/29872/	
Editor: 	Springer Heidelberg	
Formato: 	application/pdf	
Fonte: 	Environmental Science And Pollution Research (0944-1344) (Springer Heidelberg), 2014-12 , Vol. 21 , N. 24 , P. 13689-13702	
Fonte: 	Springer-Verlag Berlin Heidelberg 2014

info:eu-repo/semantics/openAccess

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