Journal
MARINE POLLUTION BULLETIN
Volume 64, Issue 9, Pages 1956-1961Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2012.05.005
Keywords
Activity concentration; U-235; Th-232; (CS)-C-137; Oman Sea; Sediment
Funding
- energy development and generation society of Atomic Energy Organization of Iran (AEOI)
- Persian Gulf and Oman Sea ecological research institute
- Office of Graduate Studies of the University of Isfahan
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The natural radioactivity levels in sediment samples of the northern coast of Oman Sea, covering the coastal strip from Hormoz canyon to Goatr seaport, as the first time has been determined. The results of measurements will serve as background reference level for Oman Sea coastlines. Sediments from 36 coastal and near shore locations were collected for analysis. Analysis on the collected samples were carried out to determine U-235, U-238, Th-232, K-40 and Cs-137 using two high purity germanium detectors with 38.5% and 55% relative efficiencies. The concentration of U-235, U-238, Th-232, K-40 and Cs-137 in sediment samples ranged between 1.01 and 2.87 Bq/kg, 11.83 and 22.68 Bq/kg, 10.7 and 25.02 Bq/kg, 222.89 and 535.07 Bq/kg and 0.14 and 2.8 Bq/kg, respectively. The radium equivalent activity was well below the defined limit of 370 Bq/kg. The external hazard indices were found to be less than 1, indicating a low dose. (C) 2012 Elsevier Ltd. All rights reserved.
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