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

Abstract:

:Measurements of (239+240)Pu and (238)Pu 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+240)Pu and from 0.89 to 8.63 for (238)Pu. Corresponding activity concentrations of (239+240)Pu and (238)Pu 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_name

Radiat Prot Dosimetry

authors

Sirelkhatim DA,Sam AK,Hassona RK

doi

10.1093/rpd/ncn193

subject

Has Abstract

pub_date

2008-01-01 00:00:00

pages

414-7

issue

4

eissn

0144-8420

issn

1742-3406

pii

ncn193

journal_volume

131

pub_type

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