Transfer factors for the „soil-cereals” system in the region of Pcinja, Serbia

The aim of the paper was to estimate the values of transfer factors for natural radionuclides (40K, 226Ra, 232Th, 235U, and 238U) and 137Cs from soil to plants (cereals: wheat, corn and barley) as important parameters for the agricultures in the selection of the location and the sort of cereals to be planted on. The results presented in this paper refer to the ?soil-cereals? system in the region of Pcinja, Serbia. Total of 9 samples of soil and 7 samples of cereals were measured in the Department of Radiation and Environmental Protection, Vinca Institute of Nuclear Sciences, using three high-purity germanium detectors for gamma spectrometry measurements. In all the samples, transfer factors for 226Ra are significantly lower than for 40K, but they are all in good agreement with the literature data. On the three investigated locations, the calculated values of transfer factors for 40K were in the range of 0.144 to 0.392, while in the case of 226Ra, the transfer factors ranged from 0.008 to 0.074. Only one value (0.051) was obtained for transfer factor of 232Th. Specific activities of 137Cs, as well as uranium isotopes, in all the investigated cereal samples, were below minimal detectable activity concentrations. Also, the absorbed dose rate and the annual absorbed dose from the natural radionuclides in the soil, were calculated. The absorbed dose rate ranged from 49-86 nSv/h, while the annual absorbed dose ranged from 0.061-0.105 mSv. The measurements presented in this manuscript are the first to be conducted in the region of Pcinja, thus providing the results that can be used as a baseline for future measurements and monitoring.

Download Full-text

Measurement of (40K, 238U and 232Th) and Associated Dose Rates in Soil and Commonly Consumed Foods (Vegetables and Tubers) at Okitipupa, Ondo State, Southwestern Nigeria

Asian Journal of Research and Reviews in Physics ◽

10.9734/ajr2p/2018/v1i124597 ◽

2018 ◽

pp. 1-11

Author(s):

A. Ibitola, Gilbert ◽

Ajanaku Olanrewaju ◽

Ilori, Abiola Olawale ◽

R. O. Aremu ◽

I. A. A. Omosebi

Keyword(s):

Effective Dose ◽

Dose Rate ◽

Annual Effective Dose ◽

Natural Radionuclides ◽

Absorbed Dose ◽

Absorbed Dose Rate ◽

Southwestern Nigeria ◽

Transfer Factors ◽

Ondo State ◽

The Mean

The aim of this present study is to collect soil samples and some commonly consumed food materials in Ondo State, Nigeria such as tubers (cassava, Manihot esculent and yam, Dioscorea alata) samples and vegetables (waterleaf, Talinium triangulare and bitter leaf, Vernonia amygdalina) samples at some selected locations in Okitipupa, Ondo state, Southwestern, Nigeria in order to determine the following natural radionuclides (40K, 238U and 232Th) levels using a well calibrated NaI(TI) which is well shielded with a detector coupled to a computer resident quantum MCA2100R Multichannel. The transfer factors, annual absorbed dose rate and the annual effective dose in the samples collected were estimated. The results showed that the measured natural radionuclides were present in the mean concentrations of 323.79 ± 12.45 Bqkg-1, 81.87 ± 45.30 Bqkg-1 and 57.62 ± 18.04 Bqkg-1 for 40K; 11.76 ± 36.03 Bqkg-1, 4.67 ± 10.12 Bqkg-1 and 3.45 ± 2.10 Bqkg-1 for 238U and 9.66 ± 0.89 Bqkg-1, 3.07 ± 2.45 Bqkg-1 and 2.45 ± 0.92 Bqkg-1 for 232Th for soil, yam and cassava samples respectively. The results also showed that the radionuclides were present in the concentrations of 11.76 ± 36.03 Bqkg-1 and 9.66 ± 0.89 Bqkg-1 for 40K; 9.67 ± 8.53 Bqkg-1 and 7.87 ± 1.89 Bqkg-1 for 238U and 8.63 ± 6.08 Bqkg-1 and 6.58 ± 0.76 Bqkg-1 for 232Th for waterleaf and bitter leaf samples respectively. The soil-to-yam transfer factors were found to be 0.26, 0.40 and 0.32 for 40K, 238U and 232Th and soil-to-cassava yam transfer factors were found to be 0.18, 0.29 and 0.25 for 40K, 238U and 232Th respectively. The soil-to-waterleaf transfer factors were found to be 0.37, 0.82 and 0.82 for 40K, 238U and 232Th while the soil-to-bitter leaf transfer factors were found to be 0.32, 0.74 and 0.68 for 40K, 238U and 232Th respectively. The mean absorbed dose rate was 25.08 ± 0.57 and the mean annual outdoor effective dose was 46.17 . The annual effective dose reported for this present study area represents 65.95% of the world average value of 70.00 and 47.11% of Nigeria value of 98.00 mSvy-1

Download Full-text

NATURAL RADIATION ABSORBED DOSE RATE AND RADIATION TRANSFER FACTOR FROM SOIL TO VEGETABLE IN SOME SELECTED AREAS OF CHITTAGONG, BANGLADESH

Journal of Southwest Jiaotong University ◽

10.35741/issn.0258-2724.56.4.56 ◽

2021 ◽

Vol 56 (4) ◽

pp. 659-672

Author(s):

Sk. A. K. Arafin ◽

Md. Sapan Bhuiyan ◽

Jannatul Ferdous ◽

M. Ashraful Hoque ◽

A. K. M. Rezaur Rahman ◽

...

Keyword(s):

Dose Rate ◽

Natural Radioactivity ◽

Transfer Factor ◽

Gamma Ray ◽

Natural Radionuclides ◽

Absorbed Dose ◽

Gamma Ray Spectrometry ◽

Absorbed Dose Rate ◽

Anthropogenic Radionuclides ◽

Transfer Factors

The study aimed to investigate natural radioactivity levels and Transfer Factors of natural radionuclides from soil to some plants in Chittagong, Bangladesh. The concentrations of naturally occurring and anthropogenic radionuclides in soil and plants were measured in this work to determine the absorbed dose rate and the transfer factors of radionuclides from soil to plant. Plants (Spinach and Vegetables) and corresponding soil samples were collected from three different locations in Chittagong (Nasirabad, Sitakunda, and Halda Agrotechnology), and the concentrations of activity of natural radionuclides were measured using gamma-ray spectrometry. The average absorbed dose rate in the soil of Nasirabad, Sitakunda, and Halda Agrotechnology are 49.84 nGyh-1, 37.4 nGyh-1, and 45.6 nGyh-1. The average transfer factor from soil to plants, recorded for 238U, 232Th, and 40K of these study areas, are 0.461, 0.400, and 3.10, respectively. The ratio of soil to plant transfer factor for the present study compared with some previous work. The Transfer Factor of 40K gives some high value but does not exceed the limit of the different published values. Because there are no existing databases for the natural radioactivity in soil and plants from Chittagong, Bangladesh, our results are establishing a database for the Chittagong, Bangladesh soil and plants. This data may be used as a database for further investigation for the betterment of public health.

Download Full-text

Activity of natural radionuclides and their contribution to the absorbed dose in the fish cubera snapper (lutjanus cyanopterus, cuvier, 1828) on the coast of Ceara, Brazil

Brazilian Journal of Oceanography ◽

10.1590/s1679-87592010000800005 ◽

2010 ◽

Vol 58 (spe4) ◽

pp. 25-32 ◽

Cited By ~ 5

Author(s):

Wagner de S. Pereira ◽

Alphonse Kelecom ◽

Delcy de A. Py Júnior

Keyword(s):

Dose Rate ◽

Standard Dose ◽

Natural Radionuclides ◽

Absorbed Dose ◽

Threshold Value ◽

Average Dose ◽

Absorbed Dose Rate ◽

Dose Rates ◽

A Value ◽

Lead 210

A methodology was developed for converting the activity concentration of radionuclides (Bq kg-1) into absorbed dose rate (Gy y-1), aiming an approach to environmental radioprotection based on the concept of standard dose limit. The model considers only the internal absorbed dose rate. This methodology was applied to the cubera snapper fish (Lutjanus cyanopterus, Cuvier, 1828) caught off the coast of Ceará. The natural radionuclides considered were uranium-238, radium-226, lead-210, thorium-232 and radium-228. The absorbed dose rates were calculated for individual radionuclides and the type of emitted radiation. The average dose rate due to these radionuclides was 5.36 µGy y-1, a value six orders of magnitude smaller than the threshold value of absorbed dose rate used in this study (3.65 10³ mGy y-1), and similar to that found in the literature for benthic fish. Ra-226 and U-238 contributed 67% and 22% of the absorbed dose rate, followed by Th-232 with 10%. Ra-228 and Pb-210, in turn, accounted for less than 1% of the absorbed dose rate. This distribution is somewhat different from that reported in the literature, where the Ra-226 accounts for 86% of the absorbed dose rate.

Download Full-text

Radon Concentration, Absorbed Dose Rate in Air and Concentration of Natural Radionuclides in Soil in the Osaka District of Japan

Radiation Protection Dosimetry ◽

10.1093/oxfordjournals.rpd.a081585 ◽

1992 ◽

Vol 45 (1-4) ◽

pp. 477-482 ◽

Cited By ~ 4

Author(s):

K. Megumi ◽

S. Abe ◽

M. Abe ◽

T. Matsunami ◽

T. Ishiyama ◽

...

Keyword(s):

Dose Rate ◽

Radon Concentration ◽

Natural Radionuclides ◽

Absorbed Dose ◽

Absorbed Dose Rate

Download Full-text

Estimation of radioecological parameters of soil samples from a phosphatic area

Nuclear Technology and Radiation Protection ◽

10.2298/ntrp1602165h ◽

2016 ◽

Vol 31 (2) ◽

pp. 165-172 ◽

Cited By ~ 4

Author(s):

Shaaban Harb ◽

Noor Ahmed ◽

Wael Badawy ◽

Nagwa Saad

Keyword(s):

Dose Rate ◽

Annual Effective Dose ◽

Natural Radionuclides ◽

Significant Risk ◽

Absorbed Dose ◽

Soil Samples ◽

Absorbed Dose Rate ◽

Activity Concentrations ◽

Average Activity ◽

Range Of Values

The activity concentrations of natural radionuclides (226Ra, 232Th, and 40K) for a set of 31 agricultural soil samples from the Nile River banks in the area of El-Sebaiya city, Aswan Governorate, Egypt were measured by gamma-spectrometry. The study revealed that the average activity concentrations of natural radionuclides 226Ra, 232Th, and 40K were 23.2 ? 2.8Bq/kg, 21.1 ? 2.8 Bq/kg, and 218.6 ? 3.7 Bq/kg, respectively. The obtained results of the activity concentrations are within the range of values reported for neighbouring areas in Egypt. The values obtained for the hazard indices and the representative level index in all sampling sites were lower than unity, showing that there is no significant risk arising from the exposure to the soil in the studied area. The absorbed dose rate and annual effective dose in air outdoors and indoors were calculated from 226Ra, 232Th, and 40K in soil, the average values being 32.64 nGy/h, 40.06 ?Sv, and 160.25 ?Sv, respectively. The absorbed dose rate at the eastof El-Sebaiya city is higher than that obtained for the west because of higher concentrations of tri-calcium phosphate in the soil. The studied area is not significantly affected by the industrial activities, except for a few isolated spots.

Download Full-text

CHARACTERIZATION OF SAND SAMPLES FROM KARACHI BEACHES USING GAMMA SPECTROMETRY AND XRD

Radiation Protection Dosimetry ◽

10.1093/rpd/ncaa035 ◽

2020 ◽

Vol 189 (2) ◽

pp. 234-241 ◽

Cited By ~ 1

Author(s):

Jahan Zeb ◽

Mohammad Wasim ◽

Sardar A Shah ◽

Safia Khanam ◽

Hajira Tahir ◽

...

Keyword(s):

Dose Rate ◽

Natural Radionuclides ◽

Absorbed Dose ◽

Radiation Hazard ◽

Absorbed Dose Rate ◽

Radium Equivalent Activity ◽

Chemical Phase ◽

Radium Equivalent ◽

Average Activity

Abstract Chemical phase and distribution of natural radionuclides (226Ra, 232Th and 40K) were determined for sand samples collected from ten different beaches of Karachi. All samples, except one, were identified with major and minor phases as SiO2 and CaCO3, respectively. The average activity concentrations were 24.9, 25.0 and 239 Bq kg−1 for 226Ra, 232Th and 40K, respectively. Including all samples, the average radium equivalent activity was 79.1 Bq kg−1. The external and internal radiation hazard indices and representative level index were all found below unity. The average air absorbed dose rate at 1 m above the sand due to the natural radionuclides was 18.3 nGy h−1, which was less than the world average for soil. The corresponding annual effective dose rate was 22.4 μSv y−1. It was found that Raeq had positive significant correlation with the amount of quartz present at the beaches.

Download Full-text

Radon Concentration, Absorbed Dose Rate in Air and Concentration of Natural Radionuclides in Soil in the Osaka District of Japan

Radiation Protection Dosimetry ◽

10.1093/rpd/45.1-4.477 ◽

1992 ◽

Vol 45 (1-4) ◽

pp. 477-482 ◽

Cited By ~ 1

Author(s):

K. Megumi ◽

S. Abe ◽

M. Abe ◽

T. Matsunami ◽

T. Ishiyama ◽

...

Keyword(s):

Dose Rate ◽

Radon Concentration ◽

Natural Radionuclides ◽

Absorbed Dose ◽

Absorbed Dose Rate

Download Full-text

A Study on Natural Absorbed Dose Rate in Air(Using TLDs) and Concentration of Natural Radionuclides in Soil in All Area of the Osaka Pref.

Japanese Journal of Health Physics ◽

10.5453/jhps.26.109 ◽

1991 ◽

Vol 26 (2) ◽

pp. 109-116

Author(s):

Kazuko MEGUMI ◽

Masahiro DOI ◽

Takashi OKA ◽

Tadao MATSUNAMI ◽

Toshio ISHIYAMA

Keyword(s):

Dose Rate ◽

Natural Radionuclides ◽

Absorbed Dose ◽

Absorbed Dose Rate

Download Full-text

NATURAL RADIOACTIVITY AND EVALUATION OF RADIATION HAZARDS IN SOILS FROM GRANITOIDE-GRANITE GEOLOGICAL FORMATION IN CUBA

Radiation Protection Dosimetry ◽

10.1093/rpd/ncy178 ◽

2018 ◽

Vol 184 (1) ◽

pp. 5-11

Author(s):

C M Alonso-Hernández ◽

A L Toledo-Sibello ◽

A Guillén-Arruebarrena ◽

R Sibello-Hernández ◽

Y Morera-Gómez ◽

...

Keyword(s):

Dose Rate ◽

Natural Radioactivity ◽

Background Radiation ◽

Natural Radionuclides ◽

Hazard Index ◽

Absorbed Dose ◽

Absorbed Dose Rate ◽

Radium Equivalent Activity ◽

Radiation Hazards ◽

External Hazard Index

Abstract The natural radioactivity and the associated radiation hazards of soils from the Cumanayagua Granitoide-Granitic massif in the central south of Cuba have been studied. Mass activities of the natural radionuclides 238U, 232Th and 40K varied in the ranges 10.4–33, 4.6–21.7 and 381–1201 Bq kg−1, respectively. The radium equivalent activity (91.4 ± 22.1 Bq kg−1), absorbed dose rate (45.6 ± 11.1 nGy h−1), annual effective dose rate (56.1 ± 13.7 μSv y−1) and the external hazard index (0.25 ± 0.06) have been calculated and compared with the internationally approved values. According to these results, the area can be regarded as an area with normal natural background radiation and may not pose radiological risks to the inhabitants owing to harmful effects of ionizing radiation from the natural radionuclides in soils. This study provides background radioactivity concentrations in Cumanayagua Granitoide area and generate a baseline data for radiological mapping of Cuba in the future.

Download Full-text