Thiophilicity is a determinant of bioaccumulation in benthic fauna

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dc.contributor.authorO'Callaghan, Irene
dc.contributor.authorFitzpatrick, Dara
dc.contributor.authorSullivan, Timothy
dc.contributor.funderIrish Research Councilen
dc.contributor.funderEnvironmental Protection Agencyen
dc.date.accessioned2022-01-17T14:06:08Z
dc.date.available2022-01-17T14:06:08Z
dc.date.issued2021-12-07
dc.date.updated2022-01-17T13:52:44Z
dc.description.abstractAquatic contamination can settle into sediments, where it complexes with organic matter and becomes bioavailable. The resulting bioaccumulation of these contaminants by benthic fauna poses a serious threat due to the potential for trophic transfer. This paper offers an insight into the heterogenous accumulation behavior of different elements, and the consequences for ecological risk. In this study, we present field quantification of sediment-associated bioaccumulation factors (BAFS) in freshwater benthic macroinvertebrates. 17 elements were quantified using ICP-MS in sediment and Asellus aquaticus and Gammarus sp. samples. Previously published reports of contaminant concentrations in freshwater and marine sediments and benthic fauna were likewise analyzed to provide a complementary picture of bioaccumulation across contaminants and taxa. We demonstrate that the BAFS correlates strongly with the thiophilicity of the elemental contaminants, as defined by (Kepp, 2016), for all strata examined. These findings support the hypothesis that thiol-mediated processes, such as that of metallothionein, play a larger role in bioaccumulation than typically afforded. In conclusion, we demonstrate the potential for the thiophilic scale to act as a predictor of accumulation potential.en
dc.description.sponsorshipEnvironmental Protection Agency (Grant no. GOIPG/2018/3351)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid118641en
dc.identifier.citationO'Callaghan, I., Fitzpatrick, D. and Sullivan, T. (2021) 'Thiophilicity is a determinant of bioaccumulation in benthic fauna', Environmental Pollution, 294, 118641 (7pp). doi: 10.1016/j.envpol.2021.118641en
dc.identifier.doi10.1016/j.envpol.2021.118641en
dc.identifier.eissn1873-6424
dc.identifier.endpage7en
dc.identifier.issn0269-7491
dc.identifier.journaltitleEnvironmental Pollutionen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/12396
dc.identifier.volume294en
dc.language.isoenen
dc.publisherElsevier Ltd.en
dc.rights© 2021, Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 license.en
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectBioavailabilityen
dc.subjectMetallothioneinen
dc.subjectMacroinvertebrateen
dc.subjectMetal contaminationen
dc.subjectTrophic transferen
dc.titleThiophilicity is a determinant of bioaccumulation in benthic faunaen
dc.typeArticle (peer-reviewed)en
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