Similarity of 241Am and 59Fe specification in selected freshwaters and of their adsorption on crayfish exoskeleton |
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| Institution: | 1. School of Life Sciences, Shandong University of Technology, Zibo, Shandong, 255000, China;2. School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, 255000, China;1. UWA School of Agriculture and Environment, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia;2. Faculty of Agriculture, The University of Zagreb, Svetosimunska cesta 25, 10 000 Zagreb, Croatia;3. The Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia;1. China University of Geosciences, Wuhan 430074, China;2. The University of Melbourne, VIC 3010, Victoria, Australia;3. Guangdong Hydrogeology Battalion, Guangzhou 510510, China;1. Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, PR China;2. State Key Laboratory of Food Science and Technology, School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, PR China;3. Department of Chemistry, University of British Columbia, Vancouver V6T 1Z4, British Columbia, Canada;1. Institute of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech Republic;2. Department of Natural Drugs, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences Brno, Palackého 1/3, 612 42 Brno, Czech Republic;3. International Clinical Research Center, Center of Biomedical Engineering, St. Anne’s University Hospital Brno, Pekařská 53, 656 91 Brno, Czech Republic |
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| Abstract: | The particulate fraction (measured by filtration through 0·45 μm filters) and the organically complexed fraction (measured by gel filtration chromatography) of freshly added 241Am and 59Fe were determined in 21 prefiltered surface waters. The adsorptive behaviour of both radionuclides on a biological surface (isolated carapace segments of crayfish) was tested simultaneously. A striking similarity was observed in the chemical and adsorptive behaviours of both radionuclides. The stoichiometry of particulate formation revealed a 3/4, Am to Fe ratio. This same stoichiometric relationship was observed in organic complexation, while adsorptive behaviour was characterised by a 1/1, Am to Fe ratio. It is concluded that Am predictably follows the chemistry of freshly added Fe at least over a 15 day period. This observation may find interesting application in risk assessment where use can be made of the well-known geochemical cycling of iron to predict the behaviour of man-made Am. |
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