2024-03-28T11:59:54Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/769812021-11-03T12:06:35Zcom_10261_98com_10261_3col_10261_351
Behaviour of Au-citrate nanoparticles in seawater and accumulation in bivalves at environmentally relevant concentrations
García-Negrete, C. A.
Blasco, Javier
Volland, Moritz
Rojas, T. Cristina
Hampel, Miriam
Lapresta-Fernández, A.
Jiménez de Haro, María del Carmen
Soto, Manu
Fernández-Camacho, A.
Gold nanoparticles
Chloroauric acid
Ecotoxicity
Sea water
Bivalve accumulation
Electron microscopy
Ruditapes philippinarum
Cellular location
8 páginas, 1 tabla, 5 figuras
The degree of aggregation and/or coalescence of Au-citrate nanoparticles (AuNPs, mean size 21.5 ± 2.9 nm), after delivery in simulated seawater, are shown to be concentration-dependent. At low concentrations no coalescence and only limited aggregation of primary particles were found. Experiments were performed in which the marine bivalve (Ruditapes philippinarum) was exposed to AuNPs or dissolved Au and subsequently, bivalve tissues were studied by Scanning and Transmission Electron Microscopy and chemical analyses. We show that the bivalve accumulates gold in both cases within either the digestive gland or gill tissues, in different concentrations (including values of predicted environmental relevance). After 28 days of exposure, electron-dense deposits (corresponding to AuNPs, as proven by X-ray microanalysis) were observed in the heterolysosomes of the digestive gland cells. Although non-measurable solubility of AuNPs in seawater was found, evidence is presented of the toxicity produced by Au3+ dissolved species (chloroauric acid solutions) and its relevance is discussed.
2013-05-28T13:00:31Z
2013-05-28T13:00:31Z
2013-03
artículo
Environmental Pollution Volume 174: 134–141 (2013)
0269-7491
http://hdl.handle.net/10261/76981
10.1016/j.envpol.2012.11.014
1873-6424
eng
http://dx.doi.org/10.1016/j.envpol.2012.11.014
info:eu-repo/grantAgreement/EC/FP7/285895
openAccess
Elsevier