Transfer factor of 226Ra, 232Th and 40K from soil to Alpinia Galangal plant grown in northern Thailand

International Nuclear Science and Technology Conference 2016

Kritsananuwat, R.^1 ; Chanyotha, S.^1 ; Kranrod, C.^1 ; Pengvanich, P.^1

Department of Nuclear Engineering, Chulalongkorn University, 254 Phayathai Road, Pathumwan, Bangkok

10330, Thailand^1

关键词: Activity concentration;    Environmental radiation;    Gamma ray spectrometry;    Natural field conditions;    Natural radionuclides;    Northern Thailand;    Soil-to-plant transfer factors;    Traditional medicines;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/860/1/012008/pdf
DOI  :  10.1088/1742-6596/860/1/012008

来源: IOP

【 摘 要 】

This paper reports the activity concentration of three natural radionuclides,226Ra,232Th and40K, found in Alpinia Galangal plants which are widely used in various Asian cuisines and traditional medicine. The galangal plants and their relevant soils were collected from four provinces in the north of Thailand under natural field conditions. The activity concentration of radionuclides was determined using gamma-ray spectrometry. Soil-to-plant transfer factors (TFs) for226Ra,232Th and40K were investigated in rhizome and aerial parts of the galangal plants. The activity concentration in the soils ranged from 22 to 88 Bq kg-1for226Ra, 27 to 157 Bq kg-1for232Th and 58 to 1157 Bq kg-1for40K. In Alpinia Galangal, the concentration ranged from -1for226Ra, -1for232Th and 205 to 2247 Bq kg-1for40K. The TF ranged from 226Ra, 232Th and 0.26 to 7.9 for40K. The TFs in the aerial parts were higher than those for the rhizomes. The obtained values can be considered as a baseline data for activity concentrations of natural radionuclides and their TFs in Thailand for future environmental radiation monitoring. The Annual effective ingestion dose due to ingestion of226Ra,232Th and40K in galangals is significantly below the worldwide value reported by UNSCEAR 2000.