The226Ra/Ba-ratio as indicator for phosphogypsum contributions to226Ra levels in sediments |
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Authors: | P Bode J M De Goeij P Van Aller |
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Institution: | (1) Interfaculty Reactor Institute, Delft University of Technology, Mekelweg 15, 2629 JB Delft, The Netherlands |
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Abstract: | Phosphogypsum discharges by phosphate-ore processing industries pollute sediments of the Rotterdam harbour area with226Ra. Direct measurement of this radionuclide in sediments does not provide a reliable indication of the elevation of the levels,
since226Ra levels in sediments depend on the particle size. To eliminate the size effect, the226Ra/Ba ratio in sediments was tested as a possible indicator for the226Ra in the discharges. The results indicate almost a doubling of the226Ra levels in sediment samples due to phosphogypsum discharges. The contribution of phosphogypsum to the sediment mass was
calculated in the order of a few percent equivalent. |
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