Distribution of radionuclides and heavy metals in the bituminous sand deposit in Ogun State, Nigeria – A multi-dimensional pollution, health and radiological risk assessment

Gbadamosi, Muideen Remilekun; Afolabi, T. Adeniyi; Ogunneye, A.L.; Ogunbanjo, O.O.; Omotola, Elizabeth Oyinkansola; Kadiri, T.M.; Akinsipo, O.B.; Jegede, D.O.

doi:10.1016/j.gexplo.2018.03.006

Cited by 55 publications

(30 citation statements)

References 50 publications

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“…The science of toxicology shows that these workers can have some health challenges due to exposure to heavy metals/ elements in the natural environment (particularly rocks or mined mineral resources). Heavy metals have drawn considerable attention due to their non-biodegradable nature and toxicities 9 . There is also evidence that high exposure to low doses of cancer-causing heavy metals may cause several types of cancers 10 .…”

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confidence: 99%

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Toxicology of Heavy Metals to Subsurface Lithofacies and Drillers during Drilling of Hydrocarbon Wells

Okoro

Okolie

Sanni

et al. 2020

Sci Rep

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This study investigates the toxicological effects of heavy metals on lithofacies of the subsurface in a drilled hydrocarbon well as well as, to the drilling crew and people in an environment. the pollution levels of selected heavy metals were considered alongside their ecological effects during dry and wet seasons. the health hazard potential of human exposures to the metals, were estimated in terms of intensity and time using the USepA recommended model. the heavy metal concentration for each layer decreased across the lithofacies as follows; Layer 5> Layer 4> Layer 3> Layer 2> Layer 1. the average concentrations of the heavy metals present in the samples obtained from the formation zone, varied significantly and decreased in the order of Al> Zn> ni> pb> cr> cu> cd> As> Hg. the highest concentration of Al, cu, and Zn in this present study were within the maximum allowable limits whereas, those of As, cd, Hg and ni were all above their maximum allowable limits. Among the transition metals analysed, the maximum mean daily dose of Pb (9.18 × 10 −6 mg/kg/d) and cr (1.42 × 10 −6 mg/kg/d) were confirmed susceptible to human carcinogens and environmental toxins. the estimated hazard quotient shows that the dermal pathway is the most likely route via which the drilling crew and people in the environment can get contaminated. the cancer risk values for the pb (7.72 × 10 −4), Cd (1.35 × 10 −1), Ni (9.97 × 10 −3), As (1.50 × 10 −1) and Cr (3.16 × 10 −3) are all above the acceptable values. the cancer risk contribution for each metal was in the order of As> cd> ni> cr> pb. Layer 5 had the maximum Geo-accumulation index for the heavy metals considered. This higher Geoaccumulation index noted at the depth in Layer 5 may be attributed to the effect of water basin with turbidity currents, deltas, and shallow marine sediment deposits with storm impacted conditions. Also, the pollution from lead (pb) in the dry season was maximum with an i geo value> 5 for all the lithofacies considered because of the low background concentration of the metal. During the wet season, the heavy metal pollution rate was moderate for Zn whereas, it was extremely polluted with respect to pb. The ecological risk potential of Pb shows that the associated ecological risks range from 536-664 in the wet season (i.e. extremely strong) and 2810-3480 in dry season (extremely strong). The high level of Pb pollution found in the area at such shallow depth may be due to the sedimentary folds possibly caused by the full spectrum of metamorphic rocks and primary flow structures at shallow depths. This was used to identify the environmental sensitivities of the heavy metals during the dry and wet seasons.

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confidence: 99%

“…There is also evidence that high exposure to low doses of cancer-causing heavy metals may cause several types of cancers 10 . Gbadamosi et al 9 highlighted the increased lifetime risks of lung cancer resulting from occupational exposure to dusts and mists containing hexavalent chromium.…”

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confidence: 99%

Toxicology of Heavy Metals to Subsurface Lithofacies and Drillers during Drilling of Hydrocarbon Wells

Okoro

Okolie

Sanni

et al. 2020

Sci Rep

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“…Comparing THI values for children and adults revealed that children have higher chances of non-carcinogenic and/or harmful health risks arising from exposure to heavy metals in the oil impacted soils than adults, although the calculated heavy metals exposure risks associated with contaminated soils showed a high degree of uncertainty 25. As such, the risk evaluation based on the total concentrations of heavy metals in the contaminated soils may overestimate the actual hazards they pose to humans.…”

Section: Discussionmentioning

confidence: 97%

“…The HQ is the ratio of a single metal exposure level over a specified time period to a reference dose. The hazard index is the summation of more than one HQ for multiple metals and/or exposure pathways 18,25. Hence, a combination of non-cancer risk for humans from different exposure pathways can be estimated by adding the HI of each of the exposure pathways to the deleterious metals 26.…”

Section: Methodsmentioning

confidence: 99%

“…Hence, a combination of non-cancer risk for humans from different exposure pathways can be estimated by adding the HI of each of the exposure pathways to the deleterious metals 26. The total hazard quotient (THQ) and total hazard index (THI) were also considered, which are the sum of all HQ and HI for all the metals, respectively 18,25,27. The equations for estimating the HQ, HI, THQ and THI of the metals are based on the model proposed by the USEPA as shown in Equations 5, 6, 7 and 8, respectively 18…”

Section: Methodsmentioning

confidence: 99%

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Analysis and Hazard Assessment of Potentially Toxic Metals in Petroleum Hydrocarbon-Contaminated Soils Around Transformer Installation Areas

Akhigbe

Adebiyi

Torimiro

2019

Journal of Health and Pollution

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Radiological and Health Risk Assessment of Naturally Occurring Radioisotopes and Toxic Metals in Sediments of Some Selected Beaches in Lagos State, Southwest Nigeria

Gbadamosi,

Abayomi,

Oluwabunmi

et al. 2024

Advances in Science, Technology &Amp; Innovation

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Distribution of radionuclides and heavy metals in the bituminous sand deposit in Ogun State, Nigeria – A multi-dimensional pollution, health and radiological risk assessment

Cited by 55 publications

References 50 publications

Toxicology of Heavy Metals to Subsurface Lithofacies and Drillers during Drilling of Hydrocarbon Wells

Toxicology of Heavy Metals to Subsurface Lithofacies and Drillers during Drilling of Hydrocarbon Wells

Analysis and Hazard Assessment of Potentially Toxic Metals in Petroleum Hydrocarbon-Contaminated Soils Around Transformer Installation Areas

Radiological and Health Risk Assessment of Naturally Occurring Radioisotopes and Toxic Metals in Sediments of Some Selected Beaches in Lagos State, Southwest Nigeria

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