Article Dans Une Revue Journal of Environmental Radioactivity Année : 2001

Natural radioactivity in phosphates, phosphogypsum and natural waters in Morocco

M Azouazi
  • Fonction : Auteur
Y Ouahidi
  • Fonction : Auteur
S Fakhi
  • Fonction : Auteur
Jean-Charles Abbe
  • Fonction : Auteur
M Benmansour
  • Fonction : Auteur

Résumé

The contents of natural radionuclides (uranium. actinium and thorium series) were measured in sedimentary phosphate rock samples using high-resolution gamma spectrometry. Data obtained for uranium content (ppm) were compared with the results obtained by a method based on the measurements using solid-state nuclear track detectors (SSNTD) in the same samples. The potential leaching of radionuclides from sedimentary phosphate rock during the industrial production of the phosphoric acid was studied. The process of leaching of the radioisotopes from phosphogypsum was discussed. A method for the direct alpha counting of Ra-226 thin source. elaborated by the deposition of Ra from aqueous solutions on manganese oxides film deposited on polyvinyl support, have been developed and applied for the determination of Ra-226 in natural water samples. The results show that only the water sample from the mine area reveals the presence of Ra-226 at a level of about 0.2 Bql(-1) (C) 2001 Elsevier Science Ltd. All rights reserved.

Dates et versions

hal-00881429 , version 1 (08-11-2013)

Identifiants

Citer

M Azouazi, Y Ouahidi, S Fakhi, Yves Andres, Jean-Charles Abbe, et al.. Natural radioactivity in phosphates, phosphogypsum and natural waters in Morocco. Journal of Environmental Radioactivity, 2001, 54 (2), pp.231-242. ⟨10.1016/S0265-931X(00)00153-3⟩. ⟨hal-00881429⟩
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