Transfer factors of 40K, 226Ra, 232Th from soil to different types of local vegetables, radiation hazard indices and their annual doses

Mheemeed, Ahmed K.; Najam, Laith Ahmed; Hussein, Alaa Ali

doi:10.1007/s10967-014-3259-y

Cited by 18 publications

(2 citation statements)

References 16 publications

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“…However, plant roots only absorb radionuclides when they are in solution in the soil. 14 In this case, radium may come into contact with the root surface. This is probably the case of Brazil nut trees known to bioaccumulate large amounts of radium isotopes in all areal parts.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of radionuclides in sugar samples from different regions of Brazil

Alcantara,

Kastrup,

Kelecom

et al. 2023

MOJPH

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Sugar contains radionuclides and its consumption may result in an increase of the internal dose in humans. Thus, this work evaluates the profile and activity of radionuclides present in 4 VHP sugar samples obtained from producers from 4 cities in Brazil, located in the Southeast and Midwest regions: Pirajuba (State of Minas Gerais), Edeia (Goiás), Pitangueira (São Paulo) and Mendonça (São Paulo). The samples were collected between the years 2019 and 2020. The analyzes were performed by gamma spectrometry using a hyper pure germanium semiconductor detector (HPGe) counting the samples over a period of 24 hours. The same profiles of radionuclides 226Ra, 212Pb, 214Bi, 40K were observed in all samples, except for the sample from Mendonça, which presented a low counting rate for 214Bi. Calculations of specific activity were carried out for the two most abundant radionuclides, 226Ra and 40K, obtaining the following values (in Bq kg-1): for 226Ra Pirajuba (22.43 Bq kg-1), Edeia (22.38 Bq kg-1), Pitangueira (18.25 Bq kg-1) and Mendonça (36.16 Bq kg-1) and for 40K Pirajuba (0.66 Bq kg-1), Edeia (0.99 Bq kg-1), Pitangueira (0.66 Bq kg-1) and Mendonça (0.33 Bq kg-1). Additionally, the values of total absorbed dose rate were calculated: Pirajuba (43.61 nGy h-1), Edeia (43.60 nGy h-1), Pitangueira (41.82 nGy h-1) and Mendonça (49.45 nGy h-1). Therefore, according to the United Nations Scientific Committee on the Effects of Atomic Radiation, the results obtained did not show a significant transfer of absorbed dose due to radionuclides from sugar consumption under the conditions adopted in this work. No variation of radiation dose according to the region or year of production was observed.

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Section: Resultsmentioning

confidence: 99%

Evaluation of radionuclides in sugar samples from different regions of Brazil

Alcantara,

Kastrup,

Kelecom

et al. 2023

MOJPH

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“…Natural potassium comprises the isotopes 39 K, 40 K and 41 K, where 39 K and 41 K are stable elements and 40 K is a radioactive isotope (isotropic abundance 0.0118%) with a half-life of 1.28 × 10 9 years, and is the most abundant radioactive substance in the human body. 40 K decays to 40 Ca by β decay (89%) and to 40 Ar by β+ decay (11%), the latter associated with the emission of a gamma ray of 1,462 keV which is used for the determination of 40 K concentration [8].…”

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Study of the Potassium Content in Amaranth Protein Using the Gamma Spectrometry Technique

Galloso¹,

Vargas-Ulloa²,

Espinosa-García³

et al. 2019

JMSE-B

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Amaranthus is a dicotyledonous pseudocereal and one of the new world's oldest crops, having originated from Meso-America and was a major food crop of the Aztecs. Popularity in the cultivation and consumption of Amaranthus seed in the modern era began in the mid-1970s with the rediscovery and promotion of amaranth due to its superior nutritional attributes as compared to cereal grains. Amaranth plant has a high-quality protein, carbohydrates, unsaturated oil, squalene, dietary fiber, tocopherols, phenolic compounds, flavonoids, vitamins and minerals. The amaranth's grain was collected at San Martin Pahuacan, Estado de Mexico, Mexico. The used methodology is gamma spectrometry with Hyperpure Germanium detector (HPGe) and Multichannel Analyzer (MCA) with Maestro ® software. The result shows a unique concentration of radioactive potassium content in the amaranth protein isolated from amaranth grains is 424.1 mg/100 g of amaranth protein. There is an excellent agreement between the amount of potassium determined by atomic absorption spectroscopy in our laboratory and the value obtained in this work using the Gamma Spectrometry Technique.

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