Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9825171 | Journal of Environmental Radioactivity | 2005 | 18 Pages |
Abstract
Concentrations of uranium-238 and thorium-232 in soil, water, grass, moss and oil-palm fruit samples collected from an area of high background radiation were determined using neutron activation analysis (NAA). U-238 concentration in soil ranged from 4.9 mg kgâ1 (58.8 Bq kgâ1) to 40.4 mg kgâ1 (484.8 Bq kgâ1), Th-232 concentration ranged from 14.9 mg kgâ1 (59.6 Bq kgâ1) to 301.0 mg kgâ1 (1204 Bq kgâ1). The concentration of U-238 in grass samples ranged from below the detection limit to 0.076 mg kgâ1 (912 mBq kgâ1), and Th-232 ranged from 0.008 mg kgâ1 (32 mBq kgâ1) to 0.343 mg kgâ1 (1.372 Bq kgâ1). U-238 content in water samples ranged from 0.33 mg kgâ1 (4.0 Bq Lâ1) to 1.40 mg kgâ1 (16.8 Bq Lâ1), and Th-232 ranged from 0.19 mg kgâ1 (0.76 Bq Lâ1) to 0.66 mg kgâ1 (2.64 Bq Lâ1). It can be said that the concentrations of environmental U-238 and Th-232 in grass and water samples in the study area are insignificant. Mosses were found to be possible bio-radiological indicators due to their high absorption of the heavy radioelements from the environment.
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Authors
A. Termizi Ramli, A. Wahab M.A. Hussein, A. Khalik Wood,