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dc.contributor.authorWyness, Adam
dc.contributor.authorPaterson, David M.
dc.contributor.authorDefew, Emma
dc.contributor.authorStutter, Marc
dc.contributor.authorAvery, Lisa
dc.identifier.citationWyness , A , Paterson , D M , Defew , E , Stutter , M & Avery , L 2018 , ' The role of zeta potential in the adhesion of E. coli to suspended intertidal sediments ' , Water Research , vol. 142 , pp. 159-166 .
dc.identifier.otherPURE: 253221871
dc.identifier.otherPURE UUID: ad1ee8b6-30e7-46ec-b2a0-34c6cd0479f0
dc.identifier.otherRIS: urn:124E944173D3AB6F12217789CA72B381
dc.identifier.otherScopus: 85049325478
dc.identifier.otherORCID: /0000-0003-1174-6476/work/47136355
dc.identifier.otherWOS: 000440125800016
dc.descriptionThis research was funded by The James Hutton Institute and the University of St Andrews. DMP received funding from the Marine Alliance for Science and Technology for Scotland (MASTS), funded by the Scottish Funding Council (grant reference HR09011).en
dc.description.abstractThe extent of pathogen transport to and within aquatic systems depends heavily on whether the bacterial cells are freely suspended or in association with suspended particles. The surface charge of both bacterial cells and suspended particles affects cell-particle adhesion and subsequent transport and exposure pathways through settling and resuspension cycles. This study investigated the adhesion of Faecal Indicator Organisms (FIOs) to natural suspended intertidal sediments over the salinity gradient encountered at the transition zone from freshwater to marine environments. Phenotypic characteristics of three E. coli strains, and the zeta potential (surface charge) of the E. coli strains and 3 physically different types of intertidal sediments was measured over a salinity gradient from 0 – 5 Practical Salinity Units (PSU). A batch adhesion microcosm experiment was constructed with each combination of E. coli strain, intertidal sediment and 0, 2, 3.5 and 5 PSU. The zeta potential profile of one E. coli strain had a low negative charge and did not change in response to an increase in salinity, and the remaining E. coli strains and the sediments exhibited a more negative charge that decreased with an increase in salinity. Strain type was the most important factor in explaining cell-particle adhesion, however adhesion was also dependant on sediment type and salinity (2, 3.5 PSU > 0, 5 PSU). Contrary to traditional colloidal (Derjaguin, Landau, Vervey, and Overbeek (DLVO)) theory, zeta potential of strain or sediment did not correlate with cell-particle adhesion. E. coli strain characteristics were the defining factor in cell-particle adhesion, implying that diverse strain-specific transport and exposure pathways may exist. Further research applying these findings on a catchment scale is necessary to elucidate these pathways in order to improve accuracy of FIO fate and transport models.
dc.relation.ispartofWater Researchen
dc.rights© 2018 Elsevier Ltd. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at
dc.subjectDLVO theoryen
dc.subjectZeta potentialen
dc.subjectIntertidal sedimenten
dc.subjectQH301 Biologyen
dc.subjectGE Environmental Sciencesen
dc.titleThe role of zeta potential in the adhesion of E. coli to suspended intertidal sedimentsen
dc.typeJournal articleen
dc.contributor.sponsorJohn Templeton Foundationen
dc.contributor.institutionUniversity of St Andrews. School of Biologyen
dc.contributor.institutionUniversity of St Andrews. Sediment Ecology Research Groupen
dc.contributor.institutionUniversity of St Andrews. Marine Alliance for Science & Technology Scotlanden
dc.contributor.institutionUniversity of St Andrews. Scottish Oceans Instituteen
dc.contributor.institutionUniversity of St Andrews. St Andrews Sustainability Instituteen
dc.description.statusPeer revieweden

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