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dc.contributor.authorLi, J
dc.contributor.authorGao, Y
dc.contributor.authorXu, N
dc.contributor.authorLi, B
dc.contributor.authorAn, R
dc.contributor.authorSun, W
dc.contributor.authorBorthwick, AGL
dc.contributor.authorNi, J
dc.date.accessioned2021-08-22T11:08:20Z
dc.date.issued2020-09
dc.identifier.issn0043-1354
dc.identifier.issn1879-2448
dc.identifier.other115933
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.

dc.format.extent115933-115933
dc.format.mediumPrint-Electronic
dc.languageen
dc.language.isoeng
dc.publisherElsevier BV
dc.subjectChanging exposure
dc.subjectEcological risk
dc.subjectPerfluoroalkyl substances
dc.subjectThree Gorges Dam
dc.subjectYangtze River
dc.subjectChina
dc.subjectEnvironmental Monitoring
dc.subjectFluorocarbons
dc.subjectGeologic Sediments
dc.subjectRivers
dc.subjectSeasons
dc.subjectWater Pollutants, Chemical
dc.titlePerfluoroalkyl substances in the Yangtze River: Changing exposure and its implications after operation of the Three Gorges Dam
dc.typejournal-article
dc.typeJournal Article
plymouth.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/32650148
plymouth.volume182
plymouth.publisher-urlhttp://dx.doi.org/10.1016/j.watres.2020.115933
plymouth.publication-statusPublished
plymouth.journalWater Research
dc.identifier.doi10.1016/j.watres.2020.115933
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.placeEngland
dcterms.dateAccepted2020-05-11
dc.rights.embargodate9999-12-31
dc.identifier.eissn1879-2448
dc.rights.embargoperiodNot known
rioxxterms.versionofrecord10.1016/j.watres.2020.115933
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2020-09-01
rioxxterms.typeJournal Article/Review


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