Journal Article

Plutonium isotopes in marine sediments and some biota from the Sudanese coast of the Red Sea

D. A. Sirelkhatim, A. K. Sam and R. K. Hassona

in Radiation Protection Dosimetry

Volume 131, issue 4, pages 414-417
Published in print September 2008 | ISSN: 0144-8420
Published online July 2008 | e-ISSN: 1742-3406 | DOI: https://dx.doi.org/10.1093/rpd/ncn193
Plutonium isotopes in marine sediments and some biota from the Sudanese coast of the Red Sea

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Measurements of 239+240Pu and 238Pu were carried out on marine biota as well as on sediments from the fringing reefs area extending towards north and south (Flamingo Bay) of PortSudan harbour. The analyses were performed using radiochemical separation and alpha spectrometry. The range of the activity concentrations in marine sediments, in mBq kg−1 dry weight, was found to be from 5.10 to 82.00 for 239+240Pu and from 0.89 to 8.63 for 238Pu. Corresponding activity concentrations of 239+240Pu and 238Pu in sediments from the harbours at PortSudan and Sawakin were 53-301 and 8.29-28.6 (PortSudan) and 163-343 and 4.7 (Sawakin), respectively. The higher values for plutonium in marine algae suggest their suitability as an indicator species for monitoring purposes. The results obtained are generally lower than those found by other studies and show that the Red Sea environment is mildly affected by plutonium contamination. Activity ratios of plutonium isotopes confirm that the existence of plutonium in the Red Sea is mainly due to atmospheric global fallout.

Journal Article.  2232 words. 

Subjects: Nuclear Chemistry, Photochemistry, and Radiation

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