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Science and Technology of Nuclear Installations
Volume 2007, Article ID 48598, 6 pages
http://dx.doi.org/10.1155/2007/48598
Project Report

Distribution of Natural Radioactivity, 137Cs, 90Sr, and Plutonium Isotopes in a Water Column and Sediment Core along the Algerian Coast

Laboratoire d'Etudes d'Impact Radiologique, Division de l'Environnement, de la Sûreté et des Déchets Radioactifs, Centre de Recherche Nucléaire d’Alger, 02 Boulevard F. Fanon, BP 399 Algiers-Gare, Algiers 16000, Algeria

Received 12 March 2007; Accepted 27 November 2007

Academic Editor: Luigi Petrizzi

Copyright © 2007 A. Noureddine et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Concentrations of natural (40K, 210Pb, uranium, and thorium series) and artificial radioelements (137Cs, 90Sr, 239+240Pu) were determined in seawater and sediment samples collected from stations along the Algerian coast. Seawater was collected from the surface to a maximum depth of 2000 m; the sediment cores were sampled from a depth of around 1500 m. This work was carried out in August 2001, in the framework of the Regional African project /7/004 (RAF), by the accomplishment of an oceanographic campaign organized by the International Atomic Energy Agency (IAEA) in collaboration with Commissariat à l'Energie Atomique (COMENA) and L'Institut des Sciences de la Mer et de L'Amenagement du Littoral (ISMAL), on board of the research vessel of M.S. Benyahia of ISMAL. In addition to the record of the conductivity (mS) and temperature (°C) data at each station, seawater samples were treated and preconcentrated on board, those of sediment cores were divided into different layers in order to undergo analyses in the laboratory of radiological impact studies of Algiers. Concentration results were obtained for 137Cs and 90Sr in mBq/L and 239+240Pu in μBq/L in seawater, and also for natural and artificial radionuclides in Bq/kg dry weight in the layers of the sediment cores. The different profiles of 137Cs, 239+240Pu, 90Sr, and 210Pb concentrations against depth were presented to show artificial radioactivity distribution in the water column and sediment core. Concentrations of 137Cs in the sediment core were also used to identify the 137Cs peak in the area of interest.