Spatial distribution of gamma radiation dose rates from natural radionuclides and its radiological hazards in sediments along river Iju, Ogun state Nigeria

Maxwell, Omeje; Olusegun, O. Adewoyin; Emmanuel, Simon; Ijeh, B. I.; Uchechukwu, A. Omeje; Oluwasegun, Ayanbisi; Ogunrinola, E Iyanuoluwa; Angbiandoo, M Timothy Terhile; Ifeany, A Oha; Saeed, Muhammad

doi:10.1016/j.mex.2020.101086

Cited by 14 publications

(42 citation statements)

References 20 publications

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“…The study area is located in Ogun State, South-West, Nigeria, which lies within the latitude 6.9 • N and longitude 3. (12,13) . Stratigraphically, the sedimentary rock of Ogun State consists of the Abeokuta group, Imo group, Ewekoro, Oshosun, Ilaro and Benin formations (14) .…”

Section: Study Areamentioning

confidence: 99%

“…The coastal nature of the Iju river sediments shows some parts where communities have access to the river for fishing and fetching water for domestic purposes (12) . They are almost parallel to the coastline sediments of other rivers such as River Atueara that is located ∼5 kilometres away from Iju town.…”

Section: The Coastline Sediments Of Iju Rivermentioning

confidence: 99%

“…Portable hand-held radiation detector (Super-SPEC RS-125) from Canadian Geophysical Inc. was used to measure the background gamma dose level in the study area at the middle of dry season to compare the variations with Maxwell et al (12) that was conducted during rainy season. This instrument is most suitable for detecting naturally occurring radionuclides and dose exposure.…”

Section: Measurements Of Gamma Radiation Dose Levelmentioning

confidence: 99%

“…This instrument is most suitable for detecting naturally occurring radionuclides and dose exposure. The equipment has a high degree of accuracy with probable measurement errors of ∼±5% (12,16) . The portable equipment has an incorporated design and direct assay read-out values, storage data point with weather protection, easy to use and highly sensitive.…”

Section: Measurements Of Gamma Radiation Dose Levelmentioning

confidence: 99%

“…Researchers have mapped out a holistic approach to quantify and evaluate river water quality parameters and their risk exposure to the human and environmental ecosystem (11) . An earlier study was conducted by Omeje et al (12) during rainy season on the background radiation dose rates along Iju river soil sediments and its radiological risks were revealed with some significant hotsports and the distribution of gamma dose rates. At the same time, there is an urgent need to ascertain the individual radionuclides spatial distribution in dry season, which will help in deriving vital conclusion especially on the seasonal effects, trend of distribution and the probabilistic risk analysis of the soil sediment of Iju river.…”

Section: Introductionmentioning

confidence: 97%

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Measurements of Seasonal Variations of Radioactivity Distributions in Riverine Soil Sediment of Ado-Odo Ota, South-West Nigeria: Probabilistic Approach Using Monte Carlo

Maxwell

Olusegun

Joel

et al. 2021

Radiation Protection Dosimetry

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The radioactivity levels were measured using a hand-held gamma-ray survey meter and NaI (Tl) based gamma spectroscopy to evaluate the seasonal variation of radioactivity levels in the riverine area of Ado-Odo Ota. The measured iso-dose map reported higher gamma dose rate of 79 nGy/h, approximately 34% higher than the world average of 59 nGy/h. The values for U-238, Th-232 and K-40 activity levels ranged between 29.9 and 21.6; 103.2 and 31.2; 802.2 and 233.5 with mean values of 26.1, 55.6 and 499.3 Bq/kg, respectively. According to the mean, 5th and 95th percentiles of the probabilities using the Monte Carlo simulation, the Radium equivalent activities and the absorbed dose rates are within their respective recommended limits of 370 Bq/kg and 84 nGy/h. This study could be used to monitor dose rates and radiological risks for the areas covering the small area (Ado-Odo Ota) to the larger area (West African Region) as baseline data.

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Section: Study Areamentioning

confidence: 99%

Section: The Coastline Sediments Of Iju Rivermentioning

confidence: 99%

Section: Measurements Of Gamma Radiation Dose Levelmentioning

confidence: 99%

Section: Measurements Of Gamma Radiation Dose Levelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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Measurements of Seasonal Variations of Radioactivity Distributions in Riverine Soil Sediment of Ado-Odo Ota, South-West Nigeria: Probabilistic Approach Using Monte Carlo

Maxwell

Olusegun

Joel

et al. 2021

Radiation Protection Dosimetry

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Occurrence and remediation of naturally occurring radioactive materials in Nigeria: a review

et al. 2021

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Radioactive compounds are released in the environment by several anthropogenic activities, however, studies reveal that naturally occurring radioactive materials are responsible for over 80% of human exposure to ionizing radiation. Reports suggest that there are severe health risks associated with exposure to elevated concentrations of radioactive materials, such as potassium ( 40 K), uranium ( 238 U and 235 U), and thorium ( 232 Th). The rarity of comprehensive reviews addressing the occurrence, risk assessment, and potential remediation strategies of radioactive pollution in Nigerian environments propelled the collection of data over the last decade. Concentration as high as 2.42 ± 0.28 Bq/L has been reported in rivers in Nigeria, much higher than the radionuclide permissible level of 1 Bq/L. There are emerging concerns as activity concentrations of gamma-emitting radioactive materials found in soils are higher than worldwide average crustal values based on several reports. In many cases, the absorbed air dose rates were also greater (i.e., 86.44 nGy hr -1 ) than acceptable limits (60 nGy hr -1 ) except for few study areas. The level of radionuclides reported is indicative of the type of parent rocks and mineral composition of the studied area. Advances in remediation technologies suggest that electroremediation, bioremediation, and adsorption are the most efficient remedial approach for decontamination of radiochemical polluted sites. There is a need to explore an integrated synergistic approach for sustainable remediation of heavily polluted sites and in the light of environmental protection, attention must be given to areas with high levels of radioactive pollution. This review seeks to bridge information gaps towards ensuring that radioactive materials do not destroy our ecosystem.

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Environmental Risks Assessment of Kaolin Mines and Their Brick Products Using Monte Carlo Simulations

et al. 2021

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This study aimed to assess the radiological health implications to humans due to the use of kaolin from kaolin mines in Nigeria. A calibrated RS-125 spectrometer was used in-situ to monitor the activity concentrations of 40 K, 238 U, 232 Th and dose-rate of kaolin minefields in Ilorin-south and Ilorinwest, Nigeria. The in-situ monitoring and measurements were done in 90 locations selected at random in the study areas. The in-situ measurements were consolidated via laboratory analysis of 48 samples of Kaolin bricks using lead-shielded NaI(Tl) detector. The estimated average values for all radiological hazard parameters for the in-situ measurements of Ilorin-west are higher than that of Ilorin-south minefield. However, the opposite was the case with the laboratory analysis of the bricks. This apparent conundrum was due to the higher values of 238 U observed in the samples of bricks from Ilorin-south. In addition, the measured activity concentration of the primordial radionuclides in the Kaolin bricks from both mines are lower than the on-site measurements. This was attributed to the contribution from other terrestrial materials on-site. The 5th, 50th, and 95th percentiles of the cumulative This is a preview of subscription content, access via your institution. Access options Buy single articleInstant access to the full article PDF. 34,95 €Price includes VAT (Nigeria) Tax calculation will be finalised during checkout.

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Spatial distribution of gamma radiation dose rates from natural radionuclides and its radiological hazards in sediments along river Iju, Ogun state Nigeria

Cited by 14 publications

References 20 publications

Measurements of Seasonal Variations of Radioactivity Distributions in Riverine Soil Sediment of Ado-Odo Ota, South-West Nigeria: Probabilistic Approach Using Monte Carlo

Measurements of Seasonal Variations of Radioactivity Distributions in Riverine Soil Sediment of Ado-Odo Ota, South-West Nigeria: Probabilistic Approach Using Monte Carlo

Occurrence and remediation of naturally occurring radioactive materials in Nigeria: a review

Environmental Risks Assessment of Kaolin Mines and Their Brick Products Using Monte Carlo Simulations

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