Activity concentration and transfer of 226Ra, 232Th, and 40K from soil-to-crops in Irele Local Government Area of Ondo State, Southwestern Nigeria

被引:0
作者
Chetty, Naven [1 ]
Ilori, Abiola Olawale [1 ,2 ]
机构
[1] Univ KwaZulu Natal, Sch Chem & Phys, Private Bag X01, ZA-3209 Scottsville, South Africa
[2] Olusegun Agagu Univ Sci & Technol, Dept Phys Sci, PMB 353, Okitipupa, Ondo State, Nigeria
关键词
Activity concentrations; Crops; Radionuclides; Soil; Transfer factors; NATURAL RADIOACTIVITY; BACKGROUND-RADIATION; RADIONUCLIDES; VICINITY; PLANTS;
D O I
10.1016/j.sciaf.2024.e02098
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The activity concentration of radionuclides in soil and crop samples obtained from Irele local government area in Ondo State, Southwestern Nigeria, was evaluated using a 760 mm x 760 mm NaI(Tl) gamma-ray detector system of model 8075, and resolution of 8 % at 0.662 MeV line of Cs-137. In addition, the radionuclide transfer from soil to crops was determined as a result. In soil samples, the mean activity concentrations of Ra-226, Th-232, and K-40 were (21.81 +/- 3.32, 12.10 +/- 4.13, 381.02 +/- 11.87 Bqkg(-1)); (31.26 +/- 3.98, 15.20 +/- 3.82, 357.46 +/- 14.62 Bqkg(-1)); (29.81 +/- 2.43, 18.86 +/- 2.34, 504.25 +/- 20.42 Bqkg(-1)) and (27.44 +/- 3.07, 21.54 +/- 3.61, 449.48 +/- 16.14 Bqkg(-1)) corresponding to plantain, maize, yam and cassava, respectively. The mean activity concentration of Ra-226, Th-232, and K-40 for plantain, maize, yam and cassava samples are (13.27 +/- 4.58, 6.48 +/- 3.94, 265.81 +/- 13.19 Bqkg(-1)); (27.03 +/- 3.70, 10.72 +/- 3.07, 345.70 +/- 14.63 Bqkg(-1)); (24.03 +/- 4.65, 13.79 +/- 4.25, 523.53 +/- 16.43 Bqkg(-1)) and (21.47 +/- 3.57, 14.44 +/- 2.20, 432.99 +/- 18.56 Bqkg(-1)), respectively. The mean transfer factor values of 226Ra, 232Th and 40K are (0.611, 0.536, 0.700); (0.867, 0.708, 0.967); (0.807, 0.736, 1.040) and (0.785, 0.668, 0.974) for soil-to-plantain, soil-to-maize, soil-to-yam, and soil-to-cassava, respectively. The results revealed that the transfer factor of the crop samples is in the following order: yam>cassava>maize>plantain. The activity concentrations of Ra-226, Th-232, and K-40 in the soil and crop samples and corresponding soil-to-crop transfer values did not cause radiation damage to human health as reported levels were below recommended limits. The results of this study may serve as the basis and future criteria for the radionuclide concentrations in soil and their migration factors for the various crops in the study area
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页数:10
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