Radiological hazard indices due to activity concentrations of natural radionuclides in farm soils from two high background radiation areas in Nigeria

Jibiri, N. N.; Alausa, Shamsideen Kunle; Farai, I. P.

doi:10.1504/ijlr.2009.028529

Cited by 29 publications

(22 citation statements)

References 23 publications

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“…The result of the survey presented above was related to the data available on radiation dose levels measured in the city of Abeokuta by Farai and Vincent [15]. The result of the measurement done by Farai and Vincent [15] showed that the estimated average value of the annual effective dose in Abeokuta is 0.45 ± 0.27 mSv/y, this value was in agreement with the estimated average value of 0.40 ± 0.26 mSv/y obtained in the earlier reports [14,16]. Using the patient records in Table 2 the data collected from the hospitals were regrouped and correlation analysis was carried out.…”

Section: Resultssupporting

confidence: 85%

“…In 2003, Obioha et al [12] carried out assessment of incidences of reproductive defects due to natural radiations in two major towns, Enugu and Owerri, from the Southeastern part of the country. After the realization of Abeokuta as an area with high natural background radiation [10] principally due to its geological formation which is majorly a basement complex formation consisting of essentially granites [13] (Figure 1), various measurements and studies have been extensively carried out on the natural radioactivity levels of Abeokuta [14][15][16]. The natural radiation dose level in Abeokuta is more than four times higher than the world average value of 70 µSv•y −1 and as such it has been classified as one of the high radiation areas in Nigeria [11].…”

Section: Introductionmentioning

confidence: 99%

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Natural background radiation dose rate levels and incidences of reproductive abnormalities in high radiation area in Abeokuta, Southwestern Nigeria

Jibiri¹,

Famodimu

2013

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A 10 y (1999-2008) birth records from two public and most accessible maternity hospitals locally in the city of Abeokuta, Nigeria were used to investigate the possible association of high outdoor gamma radiation exposure on reproductive abnormalities in the city. From the delivery record of 11,923 births in the period under study, a total number of 485 incidences of reproductive abnormalities were recoded. These incidences comprise 228 multiple births, 190 still births and, 67 premature births. Using the available terrestrial gamma radiation exposure data for the city and different reproductive abnormalities, regression assessment was carried out using the Pearson Product Moment (PPM) correlation statistics. The correlation showed that the incidences of reproductive abnormalities and the radiation dose levels were negatively correlated and correlation coefficient values were very low for each of the reproductive abnormalities considered. Factors such as socioeconomic potentials of patients, dietary and other environmental factors may have substantial influence on the reproductive defects in the area other than radiation. However, the present study has added to the radiometric information needed in understanding the relationship between natural outdoor radiation exposure and occurrences of reproductive abnormalities in areas of high radiation in the country.

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Section: Resultssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Natural background radiation dose rate levels and incidences of reproductive abnormalities in high radiation area in Abeokuta, Southwestern Nigeria

Jibiri¹,

Famodimu

2013

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“…These observations are in agreement with those reported in earlier outdoor absorbed dose studies carried out in Abeokuta (Farai & Vincent, 2006;Jibiri & Famodimu, 2013). The high dose rates recorded in this area also correlate to high concentrations of naturally occurring radionuclides in rock, soil, and building materials in the area, as reported in previous studies (Okeyode & Akanni, 2009;Jibiri, Alausa, & Farai, 2009;Okedeyi, Gbadebo, Arowolo, Mustapha, & Tchokossa, 2012).…”

Section: Variation Of Absorbed Dose Rates According To Geology Of Buisupporting

confidence: 92%

Indoor gamma dose rates in the high background radiation area of Abeokuta, South Western Nigeria

Okeyode

Oladotun

Alatise

et al. 2019

Journal of Radiation Research and Applied Sciences

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An indoor gamma dose rates survey was conducted in selected dwellings comprising homes and offices in Abeokuta, South Western Nigeria. Absorbed dose rates were measured using Gamma RAE II R (RAE Systems), which is a CsI-based dosimeter. Absorbed dose rates in the dwellings vary from 0.077 to 0.397 µSv/h, with an overall mean of 0.201 ± 0.074 µSv/h, which is more than twice the world population-weighted average indoor absorbed dose rate (0.084 µSv/h). Buildings made from mud bricks have higher absorbed dose rates than those made from cement-blocks, and houses built on rock outcrops have higher absorbed dose rates compared to those erected/built on soil. The calculated annual effective doses in the study area range from 0.540 to 2.782 mSv with an average value of 1.406 ± 0.521 mSv. The distributions of dose rates according to variations in the local geology and building materials were presented. This study provides data on the indoor component of the terrestrial gamma dose rates in Abeokuta, Nigeria, which is an update of the existing knowledge on the levels of the background radiation exposure in this high natural background radiation area. KEYWORDS Indoor gamma dose rates; Abeokuta; high background radiationCONTACT I. C. Okeyode

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“…From Table 3 Bq/kg. The Raeq values for organic fertilizers are well below the maximum limit of 370Bq kg -1 which corresponds to the dose rate limit of 1 mSv of radiation for the public (Jibiri et al, 2009). Table 4…”

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confidence: 89%

Radiological Analysis of Selected Organic Fertilizers in Zaria Local Government Area Council, Kaduna State, Nigeria: Possible Health Implications

2013

IOSR-JAP

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The activity concentrations of naturally occurring radionuclides (40 K, 226 Ra 232 Th) in nine organic fertilizers were measured using NaI (Tl) gamma ray spectrometry. The results show that 40 K mean activity concentration was 305.33±0.196Bqkg-1 ranging from 120Bq/kg to 907 Bqkg-1 , 232 Th mean concentration was 45.04Bqkg-1 ranging from 14.66 Bq/kg to 60.20Bqkg-1. While 226 Ra mean concentration was 24.87±0.02Bqkg-1 with a range of 12.83 to 65.69Bqkg-1. Radiological hazard indices were calculated and the mean air absorbed dose rate was 51.59nGyh-1 it ranged from 30.33 to 101.23nGyh-1. The annual effective dose rate averaged 61.33µSvy-1 (0.061) which is lower than the world average (0.07µSvy-1) it ranged from 33.39 to 124.51μSvy-1. The Raeq was 112.90Bqkg-1 which is far below the 370Bqkg-1 maximum.The Hex and Hin averaged 0.31 and 0.37respectively. From Radiological point, organic fertilizers do not impart significant radiological risk, because the radiological hazard indices are lower than Bench marks.

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Radiological hazard indices due to activity concentrations of natural radionuclides in farm soils from two high background radiation areas in Nigeria

Cited by 29 publications

References 23 publications

Natural background radiation dose rate levels and incidences of reproductive abnormalities in high radiation area in Abeokuta, Southwestern Nigeria

Natural background radiation dose rate levels and incidences of reproductive abnormalities in high radiation area in Abeokuta, Southwestern Nigeria

Indoor gamma dose rates in the high background radiation area of Abeokuta, South Western Nigeria

Radiological Analysis of Selected Organic Fertilizers in Zaria Local Government Area Council, Kaduna State, Nigeria: Possible Health Implications

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