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Commonly consumed vegetables and their surrounding soil samples are gathered from a farm located in Klang, Selangor. Gamma spectrometry has been utilized to analyze the activity concentration of the natural radionuclides, 226Ra, 232Th, and 40K in nine vegetables and soil samples collected. These data are used to evaluate the hazard indices in the soil samples and their radiological exposure to humans. It is found that the external hazard index Hex ranged from 0. 05 to 0.44 with a mean value of 0.14. The internal hazard index Hin of the soil samples ranged from 0.05 to 0.56 with a mean value of 0.17. Both Hex and Hin average values are lower than the limit established by the European Commission for Radiation Protection. The absorbed dose rate DN, The annual ingestion dose Aeff, annual effective dose equivalent AEDE, and excess life-time cancer risk, are used to learn the potential risk on the general public consuming these vegetables. For the vegetable sample, it is found that the average value for the Dn is 6.70 nGyh-1 and ranged between 1.75 to 16.94 nGyh-1. The average value of Aeff is 10.17 pSv, and it ranges from 2.54 pSv to 22.89 pSv. The range of AEDE is between 2.15 pSv and 20.78 pS, with an average value of 8.21 pSv. Excess life-time cancer risk ELCR is used to determine the likelihood of cancer development due to the radiological exposure of consuming these vegetables. It is found that the average value of ELCR is 2.87-10-5, and the range is from 0.75-10-5 to 7.27-10-5. Both the Aeff and AEDE are found to be lower than the average world value recommended by UNSCEAR. [ABSTRACT FROM AUTHOR]

The activity concentrations of naturally occurring radionuclides in vegetables and peat soil were investigated to determine the transfer factors of radionuclides from soil to vegetables obtained from farms in Klang Selangor. The results showed that the activity concentration ranges for 226Ra, 232Th, and 40K in the soil of the vegetable were 2.72-46.54 Bqkg-1, 9.01-54.84 Bqkg-1, and 19.22-477.76 Bqkg-1, respectively. The activity concentration ranges for 226Ra, 232Th, and 40K in various vegetable samples were 0.41-3.41 Bqkg-1, 0.02-3.56 Bqkg-1, and 16.22-317.49 Bqkg-1, respectively. The transfer factors from soil-to-plant for 226Ra, 232Th, and 40K were in the ranges of 0.01-0.67, 0.00-0.17, and 0.26-2.52, respectively. Radionuclide 40K has the highest transfer factor value in most vegetables, especially in the fruit type vegetable, and 232Th was found to have the lowest transfer factor value in all vegetables. The acquired results were compared to the levels that are globally recognized as acceptable. The transfer factor value of 40K was greater than 1 found in beans and fruit type vegetables, showing a similar value in other studies involving tropical plants, while transfer factor value for 226Ra was 15 times higher than the value reported in the data for tropical plants. [ABSTRACT FROM AUTHOR]