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dc.contributor.authorLahive, Een
dc.contributor.authorJurkschat, Ken
dc.contributor.authorShaw, BJen
dc.contributor.authorHandy, RDen
dc.contributor.authorSpurgeon, DJen
dc.contributor.authorSvendsen, Cen
dc.date.accessioned2016-06-22T16:06:40Z
dc.date.available2016-06-22T16:06:40Z
dc.date.issued2014-01-01en
dc.identifier.issn1448-2517en
dc.identifier.urihttp://hdl.handle.net/10026.1/4950
dc.description.abstract

Environmental context This study investigates the toxicity of cerium oxide nanoparticles to earthworms, key organisms in soil ecosystems. Cerium oxide did not affect survival or reproduction of the earthworms but did exert histological changes. We conclude that current soil guidelines, based simply on metal toxicity, appear to adequately protect against cerium exposure risk, at least for earthworms. Abstract The toxicity of cerium oxide (CeO2) nanoparticles (NPs) in soils is largely unknown. This study aimed to investigate the toxicity of three different CeO2 NPs to the earthworm, Eisenia fetida, for effects on survival (at day 28) and reproduction (at day 56), as well as bioaccumulation and histopathological effects. Eisenia fetida were exposed in standard Lufa 2.2 soil to three CeO2 NPs of different size ranges (5-80nm), one larger particle (300nm) and a cerium salt (ammonium cerium nitrate) over an exposure range from 41-10000mgCekg-1. Survival and reproduction were not affected by the four CeO2 particles, even at the highest exposure concentration tested. Alternatively, 10000mgCekg-1 cerium salt affected survival and reproduction; Median lethal concentration (LC50) and effective concentration (EC50) values were 317.8 and 294.6mgCekg-1. Despite a lack of toxic effect from the different forms of CeO2 particles, there was a dose-dependent increase in cerium in the organisms at all exposure concentrations, and for all material types. Earthworms exposed to CeO2 particles had higher concentrations of total cerium compared to those exposed to ionic cerium, but without exhibiting the same toxic effect. Histological observations in earthworms exposed to the particulate forms of CeO2 did, however, show cuticle loss from the body wall and some loss of gut epithelium integrity. The data suggest that that CeO2 NPs do not affect survival or reproduction in E. fetida over the standard test period. However, there were histological changes that could indicate possible deleterious effects over longer-term exposures. © CSIRO 2014.

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dc.format.extent268 - 278en
dc.language.isoenen
dc.titleToxicity of cerium oxide nanoparticles to the earthworm Eisenia fetida: Subtle effectsen
dc.typeJournal Article
plymouth.issue3en
plymouth.volume11en
plymouth.publication-statusPublisheden
plymouth.journalEnvironmental Chemistryen
dc.identifier.doi10.1071/EN14028en
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/00 All current users
plymouth.organisational-group/Plymouth/00 All current users/Academics
plymouth.organisational-group/Plymouth/00 All current users/Academics/Faculty of Science & Engineering
plymouth.organisational-group/Plymouth/00 All current users/Academics/Faculty of Science & Engineering/School of Biological & Marine Sciences
plymouth.organisational-group/Plymouth/Faculty of Science & Engineering
plymouth.organisational-group/Plymouth/Faculty of Science & Engineering/School of Biological & Marine Sciences
plymouth.organisational-group/Plymouth/Research Groups
plymouth.organisational-group/Plymouth/Research Groups/Marine Institute
dc.rights.embargoperiodNot knownen
rioxxterms.versionofrecord10.1071/EN14028en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.typeJournal Article/Reviewen


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