Optimizing standard sequential extraction protocol with lake and ocean sediments |
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| Authors: | Iisa Outola Kenneth Inn Robert Ford Steve Markham Petri Outola |
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| Institution: | (1) National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899, USA;(2) Radiation and Nuclear Safety Authority, Laippatie 4, 00881 Helsinki, Finland;(3) National Risk Management Research Laboratory, Environmental Protection Agency, Cincinnati, OH 45268, USA;(4) Shaw Environmental and Infrastructure, Inc., Ada, OK 74820, USA |
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| Abstract: | The environmental mobility/availability behavior of radionuclides in soils and sediments depends on their speciation. Experiments
have been carried out to develop a simple but robust radionuclide sequential extraction method for identification of radionuclide
partitioning in sediments and soils. The sequential extraction protocol was optimized for temperature, concentration of reagents
and reaction time. Optimum extraction conditions were chosen based on the release of 239,240Pu, 238U and stable elements. Results from the experiments with lake sediment (SRM 4354) are compared to the previous trials where
the sequential extraction protocol was optimized with the ocean sediment (SRM 4357). Based on these two trials the NIST standard
sequential extraction protocol is established for defined extraction settings for temperature, reagent concentration and time. |
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