Americium Sorption by Microplastics in Aqueous Solutions
Source abstract
Abstract
The interaction of americium by polyamide (PN6) and polyethylene (PE) microplastics (MPs) has been investigated in de-ionized and seawater samples traced with the Am-241 isotope. The effect of the pH and composition of the aqueous solution (seawater) on the sorption efficiency (Kd) have been studied as function of time. In addition, the americium sorption using radionuclide mixtures (e.g., Am-241 and U-232) and its desorption in the presence of EDTA was investigated by means of bath-type experiments. The experimental data (e.g., Kd values) revealed that the sorption efficiency depends on the MP type and the pH that governs the Am(III) speciation in the solution, and the PN6 surface charge determines the sorption efficiency. Moreover, the desorption of Am(III) from MPs is a time-depended process, and the presence of complexing agents (e.g., EDTA) enhances the desorption efficiency. The Kd values in the studied water samples were relatively close to one another and similar to corresponding values in soil systems, indicating the significant role of microplastics on the behavior of americium in natural aquatic systems.
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Research context
OpenAlex topics: Microplastics and Plastic Pollution · Recycling and Waste Management Techniques · Analytical chemistry methods development
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemistry, University of Cyprus, P.O. Box 20537, Nicosia 1678, Cyprus
Department of Agriculture, University of Ioannina, UoI Kostakii Campus, 47100 Arta, Greece
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