Critical review: Radionuclide transport, sediment transport, and water quality mathematical modeling; and radionuclide adsorption/desorption mechanisms

Onishi, Yasuo; Serne, R J; Arnold, E M; Cowan, C E; Thompson, F L

doi:10.2172/10125120

Cited by 63 publications

(65 citation statements)

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“…suspended sediment concentrations. and sediment composition (Onlshi et al 214 ). In freshwater systems, 241 Am remains bound to particulate material and, unlike Pu, does not exhibit patterns of seasonal resolubilization (Wahlgren et al 299 ).…”

Section: Radionuclioesmentioning

confidence: 99%

Literature review of the concentration ratios of selected radionuclides in freshwater and marine fish

Poston¹,

Klopfer²

1986

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Section: Radionuclioesmentioning

confidence: 99%

Literature review of the concentration ratios of selected radionuclides in freshwater and marine fish

Poston¹,

Klopfer²

1986

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“…Models of radionuclide transport should simulate hydrodynamics, sediment transport, and both dissolved and sediment-sorbed materials with their interactions. Numerous reviews of contaminant transport models (e.g., Onishi et al 1981Onishi et al , 1987Onishi 1985;NCRP 1984) indicate that many such models have been developed for rivers, estuaries, lakes, and oceans. Models that include sedimentcontaminant interactions include one-dimensional models such as TODAM (Onishi et al 1982a), twodimensional models such as SERATRA (Onishi et al 1982b) and FETRA (Onishi 1981), and three dimensional codes such as FLESCOT (Onishi et al 1993;Onishi and Trent 1982).…”

Section: Surface Water Transport -Sediment/radionuclide Interactionsmentioning

confidence: 99%

Additional Research Needs to Support the GENII Biosphere Models

Napier¹,

Snyder²,

Arimescu³

2013

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SummaryIn the course of evaluating the current parameter needs for the GENII Version 2 code (Snyder et al. 2013), areas of possible improvement for both the data and the underlying models have been identified. As the data review was implemented, PNNL staff identified areas where the models can be improved both to accommodate the locally significant pathways identified and also to incorporate newer models. The areas are general data needs for the existing models and improved formulations for the pathway models.It is recommended that priorities be set by NRC staff to guide selection of the most useful improvements in a cost-effective manner. Suggestions are made based on relatively easy and inexpensive changes, and longer-term more costly studies. In the short term, there are several improved model formulations that could be applied to the GENII suite of codes to make them more generally useful. These are: Implementation of the separation of the translocation and weathering processes  Implementation of an improved model for carbon-14 from non-atmospheric sources  Implementation of radon exposure pathways models  Development of a Keyhole Markup Language (KML) processor for the output report generator module data that could be superimposed upon digital maps for easier presentation and display  Implementation of marine mammal models (manatees, seals, walrus, whales, etc.) Modifications to include a radionuclide transport model for estuarine environments.Data needs in the longer term require extensive (and potentially expensive) research. Before picking any one radionuclide or food type, a review of current and anticipated environmental analyses should be made to select "dominant" radionuclides of interest to allow setting of cost-effective priorities for radionuclide-and pathway-specific research. These include  soil-to-plant uptake studies for oranges and other citrus fruits  Development of models for evaluation of radionuclide concentration in highly-processed foods such as oils and sugars  Sediment/radionuclide transport models in estuary, ocean, and freshwater environments.Finally, renewed studies of radionuclide cleanup in various modern types of municipal water treatment facilities such as advanced filtration or reverse-osmosis processes may be performed without development of any new or costly experimental facilities.v

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“…Many authors studied the uptake and/or release of radionuclides by different model solids representing mineral or organic components of sediments, soils, or rocks, e.g., [156][157][158][159]. The differences among the solids were used for an assessment of the role of the corresponding components in the bonding of radionuclides in environmental solids.…”

Section: Model Experiments For the Speciation In Sediments Soils Andmentioning

confidence: 99%

“…Surface charges of particles, ions and complexes play also an important role. Early results illustrated that 5 'Cr and 124 Sb migrated in the Columbia River predominantly as dissolved species (in average about 95%), whereas the average fractions of dissolved 46 Sc, 54 Mn, 5S Co, 59 Fe, 60 Co and 65 Zn were generally much lower and depended on the radionuclide [247], Some authors estimated the distribution among different phases using equilibrium or kinetic models with participation of solids in speciation or transport calculations, applying mathematical terms for solubility equilibrium or adsorption/desorption processes, e.g., [158,248]. However, limited success was achieved due to the complexity of the systems.…”

Section: Surface Watersmentioning

confidence: 99%

Speciation of Radionuclides in the Environment

Gunten

Beneš

1995

Radiochimica Acta

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Methods for the determination of the speciation of radionuclides in aerosols, in aquatic solutions, in sediments, soils and rocks are reviewed. At present, most of the results about speciation are deduced from model calculations, model experiments, and separation of species (forms) of radionuclides, e.g., by sequential extraction procedures. Methods of direct determination of speciation of radionuclides (e.g., by laser induced spectroscopy) are in general not yet sensitive enough for a measurement of the very low concentrations of radionuclides in the environment. The methodological part of this paper is followed by a review of the very abundant literature about speciation of important radionuclides in the environment, i.e., in the atmosphere, hydrosphere and lithosphère. The review does not include the biosphere. Literature up to spring 1993 is included (with a few more recent additions).

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Critical review: Radionuclide transport, sediment transport, and water quality mathematical modeling; and radionuclide adsorption/desorption mechanisms

Cited by 63 publications

References 0 publications

Literature review of the concentration ratios of selected radionuclides in freshwater and marine fish

Literature review of the concentration ratios of selected radionuclides in freshwater and marine fish

Additional Research Needs to Support the GENII Biosphere Models

Speciation of Radionuclides in the Environment

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