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dc.contributor.authorLi, Jen
dc.contributor.authorGao, Yen
dc.contributor.authorXu, Nen
dc.contributor.authorLi, Ben
dc.contributor.authorAn, Ren
dc.contributor.authorSun, Wen
dc.contributor.authorBorthwick, AGLen
dc.contributor.authorNi, Jen
dc.date.accessioned2021-08-22T11:08:20Z
dc.date.issued2020-09-01en
dc.identifier.urihttp://hdl.handle.net/10026.1/17653
dc.description.abstract

Potential ecological risk from perfluoroalkyl substances (PFASs) under changing exposure in large river systems has become a new challenge recently. Based on systematic monitoring of PFASs at 43 hydrologic stations along a 4300 km continuum of the Yangtze River, we investigated the ecological risk of PFASs under changing exposure resulting from operation of the Three Gorges Dam (TGD). Importantly, perfluorooctanoic acid (PFOA) was found extensively exposed in most mainstream water samples, accounting for about 90% of the total content of PFASs in both spring and autumn, while short-chain PFASs contributed more than PFOA in sediment. The significant inversion of long-chain PFASs occurrence from sediment to water reflected a profound change in exposure due to loss of finer sediments resulting from long-distance and long-term scour of the riverbed downstream of the TGD. The coarsening of bed materials would weaken sorption of long-chain PFASs in sediments and enhance their exposure in water, resulting in substantial increase of ecological risk to representative aquatic organisms. In the long term, particular attention should be paid to reduction of PFOA discharge to downstream of the TGD from typical industries. This also highlights the significance of huge dams to alternative exposures of persistent organic pollutants and the necessity of new strategy for ecological risk management of large river systems.

en
dc.format.extent115933 - ?en
dc.languageengen
dc.language.isoengen
dc.subjectChanging exposureen
dc.subjectEcological risken
dc.subjectPerfluoroalkyl substancesen
dc.subjectThree Gorges Damen
dc.subjectYangtze Riveren
dc.subjectChinaen
dc.subjectEnvironmental Monitoringen
dc.subjectFluorocarbonsen
dc.subjectGeologic Sedimentsen
dc.subjectRiversen
dc.subjectSeasonsen
dc.subjectWater Pollutants, Chemicalen
dc.titlePerfluoroalkyl substances in the Yangtze River: Changing exposure and its implications after operation of the Three Gorges Dam.en
dc.typeJournal Article
plymouth.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/32650148en
plymouth.volume182en
plymouth.publication-statusPublisheden
plymouth.journalWater Resen
dc.identifier.doi10.1016/j.watres.2020.115933en
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Engineering, Computing and Mathematics
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
dc.publisher.placeEnglanden
dcterms.dateAccepted2020-05-11en
dc.rights.embargodate9999-12-31
dc.identifier.eissn1879-2448en
dc.rights.embargoperiodNot knownen
rioxxterms.versionofrecord10.1016/j.watres.2020.115933en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2020-09-01en
rioxxterms.typeJournal Article/Reviewen


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