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ACTIVITY LEVEL OF 238U, 232TH, 40K AND RESULTANT DOSE RATES IN SOIL AND SOME COMMON CULTIVATED VEGETABLES

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ABSTRACT

ACTIVITY LEVEL OF 238U, 232TH, 40K AND RESULTANT DOSE RATES IN SOIL AND SOME COMMON CULTIVATED VEGETABLES

Journal: Plant Physiology and Soil Chemistry

Author:Suad A. Alsaedi, Haider M. Alfarraji, Sadeq J. Dwenee, Ibrahim B. Razaq

This is an open access article distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/ppsc.01.2022.40.45

The aim of this present study is to determine the level of natural radionuclides of 40K, 238U and 232Th in soil samples and in (Potato, Solanum tuberosum and Carrot, Daucus carota) samples and vegetables (Tomato, Solanum hycopersicum and Eggplant Solanum melongena) in Al- Mada’in district 30 km southeast of Baghdad, Iraq. High purity germanium (HPGe) detector was used for measurement. The transfer factors, annual absorbed dose rate and the annual effective dose in the samples collected were determined. The results showed that the mean level of measured natural radionuclides were 362.6 ± 41.6 Bqkg-1, 184.7 ± 17.4 Bqkg-1, 191.9 ± 13.5 Bqkg-1, 120.3 ± 10.6 Bqkg-1 and 126.1 ± 11.7 Bqkg-1 for 40K; 19.67 ± 2.00 Bqkg-1, 4.70 ± 0.609 Bqkg-1, 5.43 ± 0.977 Bqkg-1, 3.30 ± 0.460 Bqkg-1 and 2.40 ± 0.701 Bqkg-1 for 238U and 12.34 ± 4.12 Bqkg-1, 3.77 ± 0.904 Bqkg-1, 4.54 ± 0.709 Bqkg-1, 3.51 ± 0.721 and 3.81 ± 0.796 Bqkg-1 for 232Th for soil, tomato, eggplant, potato and carrot samples respectively. The soil-to-tomato transfer factors were found to be 0.512, 0.242 and 0.344 for 40K, 238U and 232Th and soil-to-eggplant transfer factors were found to be 0.534, 0.279 and 0.408 for 40K, 238U and 232Th respectively. The soil-to-potato transfer factors were found to be 0.336, 0.170 and 0.320 for 40K, 238U and 232Th while the soil-to-carrot transfer factors were found to be 0.348, 0.122 and 0.309 for 40K, 238U and 232Th respectively. The mean absorbed dose rate was 30.0 ± 0.57 nGyh-1 and the mean annual outdoor effective dose was 55.2 mSvy-1. The annual effective dose report for this present study 91.6% of the world average value of 70.00 msvy-1 and 87.3% of Thi-Qar government, south Iraq state value of 39.9 msvy-1.
Pages 40-45
Year 2022
Issue 1
Volume 2