Uranium and thorium isotopes in some red sea sediments
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A. K. Sam
Alpha-emitting isotopes of uranium and thorium in surface marine sediments collected from the harbours at Port Sudan and Sawakin on the Sudanese coast of the Red Sea have been studied using radiochemical separation procedures and alpha-particle spectrometry. Activity concentrations of 238U, 235U, 234U, 232Th, 230Th and 228Th were measured. The ranges of activities observed for 238U and 232Th were 2.71-13.42 Bq/kg and 3.62-18.73 Bq/kg from Port Sudan and 3.87-24.79 Bq/kg and 1.13-10.04 Bq/kg dry weight from Sawakin, respectively. The behaviour of these decay-series nuclides was examined using daughter/parent and non-isotopic specific activity ratios in sediments. Simple regression analysis showed insignificant correlation between uranium and thorium activities and the organic matter content in sediments. The results are compared with those from coastal waters of other oceans.
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Artikel in diesem Heft
- Investigation of 50Cr(d,n)51Mn and natCr(p,x)51Mn processes with respect to the production of the positron emitter 51Mn
- Fluoride complexation of rutherfordium (Rf, element 104)
- Continuous on-line chromatography of short lived isotopes of tungsten as homolog of seaborgium (element 106)
- Cation-cation complexes of PuO2+ and NpO2+ with Th4+ and UO22+
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- Synthesis and spectroscopic properties of neptunium VI and plutonium VI oxoanion compounds
- Thermodynamic model for the solubility of thorium dioxide in the Na+-Cl--OH--H2O system at 23°C and 90°C
- Uranium and thorium isotopes in some red sea sediments
