globalchange  > 气候减缓与适应
DOI: 10.1016/j.watres.2018.05.054
Scopus记录号: 2-s2.0-85049325478
论文题名:
The role of zeta potential in the adhesion of E. coli to suspended intertidal sediments
作者: Wyness A.J.; Paterson D.M.; Defew E.C.; Stutter M.I.; Avery L.M.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 142
起始页码: 159
结束页码: 166
语种: 英语
英文关键词: Adhesion ; DLVO theory ; Intertidal sediment ; Pathogen ; Zeta potential
Scopus关键词: Adhesion ; Catchments ; Cells ; Cytology ; Escherichia coli ; Pathogens ; Zeta potential ; DLVO theory ; Faecal indicator organisms ; Fate and transport ; Intertidal sediments ; Microcosm experiments ; Potential profiles ; Strain characteristics ; Suspended particles ; Suspended sediments ; organic matter ; river water ; sea water ; adhesion ; aquatic environment ; catchment ; coliform bacterium ; freshwater environment ; intertidal environment ; marine environment ; pathogen ; resuspension ; salinity ; sediment transport ; suspended sediment ; transition zone ; Article ; bacterial cell ; bacterium adherence ; controlled study ; Escherichia coli ; estuary ; marine environment ; microcosm ; nonhuman ; particle resuspension ; particle size ; pH ; phenotype ; priority journal ; salinity ; sediment ; surface area ; zeta potential ; Bacteria (microorganisms)
英文摘要: The 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 to 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. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112645
Appears in Collections:气候减缓与适应

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作者单位: Sediment Ecology Research Group, Scottish Oceans Institute, School of Biology, University of St Andrews, East Sands, St. Andrews, Fife, KY16 8LB, United Kingdom; Environmental and Biological Sciences Group, The James Hutton Institute, Craigiebuckler, Aberdeen, United Kingdom

Recommended Citation:
Wyness A.J.,Paterson D.M.,Defew E.C.,et al. The role of zeta potential in the adhesion of E. coli to suspended intertidal sediments[J]. Water Research,2018-01-01,142
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