Soil-to-root vegetable transfer factors for 226Ra, 232Th, 40K, and 88Y in Malaysia

Asaduzzaman, K. and Khandaker, Mayeen Uddin and Amin, Yusoff Mohd and Bradley, D.A. and Mahat, R.H. and Nor, Roslan Md (2014) Soil-to-root vegetable transfer factors for 226Ra, 232Th, 40K, and 88Y in Malaysia. Journal of Environmental Radioactivity, 135. pp. 120-127. ISSN 0265-931X

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Abstract

Soil-to-plant transfer factors (TFs) are of fundamental importance in assessing the environmental impact due to the presence of radioactivity in soil and agricultural crops. Tapioca and sweet potato, both root crops, are popular foodstuffs for a significant fraction of the Malaysian population, and result in intake of radionuclides. For the natural field conditions experienced in production of these foodstuffs, TFs and the annual effective dose were evaluated for the natural radionuclides 226Ra, 232Th, 40K, and for the anthropogenic radionuclide 88Y, the latter being a component of fallout. An experimental tapioca field was developed for study of the time dependence of plant uptake. For soil samples from all study locations other than the experimental field, it has been shown that these contain the artificial radionuclide 88Y, although the uptake of 88Y has only been observed in the roots of the plant Manihot esculenta (from which tapioca is derived) grown in mining soil. The estimated TFs for 226Ra and 232Th for tapioca and sweet potato are very much higher than that reported by the IAEA. For all study areas, the annual effective dose from ingestion of tapioca and sweet potato are estimated to be lower than the world average (290 μSv y−1).

Item Type: Article
Uncontrolled Keywords: Root vegetables; TFs of natural and artificial radionuclides; Experimental tapioca field; HPGe γ-ray spectrometry; Higher TFs than world average; First study in Malaysia
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 18 Jan 2015 07:15
Last Modified: 18 Mar 2019 08:44
URI: http://eprints.um.edu.my/id/eprint/12161

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