Initial data on adsorption of Cs and Sr to the surfaces of microplastics with biofilm

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dc.contributor.authorJohansen, MPen_AU
dc.contributor.authorPrentice, Een_AU
dc.contributor.authorCresswell, Ten_AU
dc.contributor.authorHowell, NRen_AU
dc.date.accessioned2021-12-09T23:50:53Zen_AU
dc.date.available2021-12-09T23:50:53Zen_AU
dc.date.issued2018-10en_AU
dc.date.statistics2021-11-22en_AU
dc.description.abstractThe adsorption of radiocesium and radiostrontium onto a range of natural materials has been well quantified, but not for the new media of environmental plastics, which may have enhanced adsorption due to surface-weathering and development of biofilms. Microplastic samples were deployed in freshwater, estuarine and marine conditions, then characterised using infrared spectroscopy to document changes to the plastic surface (vs interior). Synchrotron elemental mapping data revealed surfaces that were well-covered by accumulation of reactive water solutes and sulphur, but, in contrast, had highly discrete coverage of elements such as Fe and Ti, indicating adhered mineral/clay-associated agglomerates that may increase overall adsorption capacity. Plastics that had been deployed for nearly five months adsorbed radionuclides in both freshwater and estuarine conditions with the highest Kd for cesium (Cs) in freshwater (80 ml g−1) and lowest for strontium (Sr) in estuarine conditions (5 ml g−1). The degree of Cs and Sr adsorption onto plastics appears to be approximately 2–3 orders of magnitude lower than for sediment reference values. While lower than for sediments, adsorption occurred on all samples and may indicate a significant radionuclide reservoir, given that plastics are relatively buoyant and mobile in water regimes, and are increasing in global aquatic systems. Crown Copyright © 2018 Published by Elsevier Ltd.en_AU
dc.identifier.citationJohansen, M. P., Prentice, E., Cresswell, T., & Howell, N. (2018). Initial data on adsorption of Cs and Sr to the surfaces of microplastics with biofilm. Journal of environmental radioactivity, 190, 130-133. doi:10.1016/j.jenvrad.2018.05.001en_AU
dc.identifier.issn0265-931Xen_AU
dc.identifier.journaltitleJournal of environmental radioactivityen_AU
dc.identifier.pagination130-133en_AU
dc.identifier.urihttps://doi.org/10.1016/j.jenvrad.2018.05.001en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12416en_AU
dc.identifier.volume190en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectCesiumen_AU
dc.subjectStrontiumen_AU
dc.subjectRadioisotopesen_AU
dc.subjectAdsorptionen_AU
dc.subjectPlasticsen_AU
dc.subjectSedimentsen_AU
dc.subjectAquatic ecosystemsen_AU
dc.subjectSpectroscopyen_AU
dc.subjectSynchrotronsen_AU
dc.titleInitial data on adsorption of Cs and Sr to the surfaces of microplastics with biofilmen_AU
dc.typeJournal Articleen_AU
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