Geophysical and hydro-chemical investigation of contamination plume in a basement complex formation around Sunmoye dumpsite in Ikire, Southwestern Nigeria

Akinola, Bisola S.; Awoyemi, Musa Olufemi; Matthew, Olaniran J.; Adebayo, Akanmu

doi:10.1007/s40808-018-0455-8

Cited by 9 publications

(3 citation statements)

References 7 publications

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“…The locality of the chosen wells was determined using the global positioning system (GPS) receiver. Two liter plastic containers were used for the sample collection, prior to the sample collection, the plastic containers were thoroughly washed with 1 M HCl, and afterward flushed multiple times with the inspected water at the site before the water tests were collected (Akinola et al 2018). The pH and portable digital conductivity meters were used in-situ to determine the physical properties [pH, temperature and electrical conductivity (EC)] of the groundwater.…”

Section: Methods Of Sample Collection and Analysismentioning

confidence: 99%

“…The mean annual rainfall is between 1000 and 1400 mm while the monthly average temperatures range between 21 °C and 30 °C. For a quite long time, part of the city faces problems related to untreated waste disposal and pollution (Akinola et al 2018). Geologically, the investigated area is underlain by the Precambrian Basement Complex Rocks of southwestern Nigeria (Rahaman 1976).…”

Section: Description Of the Study Areamentioning

confidence: 99%

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Groundwater contamination and human health risk assessment in Ikire community, Osun State, Nigeria

Adebayo

Akinola

Adeyemi

2021

Sustain. Water Resour. Manag.

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Groundwater quality and its potential health risk around a municipal dumpsite in Ikire, Southwest Nigeria was investigated using ten groundwater samples which were analyzed for physicochemical parameters. The methods used were groundwater sampling, analyses, spatial distribution of heavy metal (Cd, Cr, Cu, Fe, Mn, Pb, and Zn) and quantitative health risk analysis using USEPA equations. The chronic daily intake (CDI), hazard quotient (HQ), and hazard index (HI) were used to examine potential human health risks of heavy metal pollution. The mean concentration values of Cl − , Ca 2+ , K + Mg 2+ , Fe, Cd, Pb and Mn were higher than their respective permissible limits, while the mean concentration values HCO 3 − , Cu and Zn were within their respective limits. The HQ values of the heavy metals via oral ingestion for the children and adults are found in the order: Cd > Pb > Mn > Fe > Zn > Cu and Cd > Pb > Mn > Zn > Cu > Fe, respectively. The HI values via ingestion pathway for all heavy metals were beyond the threshold value of 1.0, indicating high contamination adverse health risk due to an undesirable level of heavy metals. Cadmium is a major contributor to non-cancer effects in children and adults in the groundwater samples in the region. The groundwater is unsafe for drinking and should be treated before domestic consumption.

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Section: Methods Of Sample Collection and Analysismentioning

confidence: 99%

Section: Description Of the Study Areamentioning

confidence: 99%

Groundwater contamination and human health risk assessment in Ikire community, Osun State, Nigeria

Adebayo

Akinola

Adeyemi

2021

Sustain. Water Resour. Manag.

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“…The measurements of the electrical resistivity could in turn be used to determine the true resistivity of the subsurface. The DC resistivity techniques have been used over the years in groundwater exploration (Gautam and Biswas 2016;Oyeyemi et al 2018a, b), engineering investigations (Oladunjoye et al 2017;Oyeyemi et al 2017Oyeyemi et al , 2020, mineral exploration (Zhang et al 2015;Sanuade et al 2018), and environmental studies (Rosales et al 2012;Akinola et al 2018;Olaojo et al 2018;Olaseeni et al 2018). However, to obtain the electrical resistivity image that would be a representation of the subsurface, the electric potential data that are measured on the field must be inverted, and forward modeling is an important step for any inversion algorithms to be used (Gao et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Direct current electrical resistivity forward modeling using comsol multiphysics

Sanuade

Amosun

Fagbemigun

et al. 2020

Model. Earth Syst. Environ.

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Forward modeling of direct current (DC) resistivity is very important for the inversion of the resistivity data to obtain the true resistivity of the subsurface. In this study, we demonstrated finite-element forward modeling of DC resistivity method with point electric source using COMSOL Multiphysics. We employed the AC/DC module in COMSOL which often provides comparatively easy implementation of models and permits exterior boundaries to be placed at infinity, a boundary condition often experienced in most geophysical problems. The validity and effectiveness of the results of numerical simulation using COMSOL Multiphysics were evaluated by comparing the output of the numerical simulations with the calculated analytic solutions. The result reveals that the numerical simulation is in agreement with the analytic solution. This study shows that COMSOL Multiphysics can be used to simulate the distribution of electrical potentials of point source in 3D space in real life and the information from this study can be used for further studies, such as DC resistivity inversions. Keywords Forward modeling • COMSOL • resistivity • Simulation List of symbols ρ a Apparent resistivity ∆V Difference in electrical potential σ Electrical conductivity n Normal to the surface σ 2 Anomaly conductivity V Electrical potential E Error analysis G Geometrical factor I Current injected I o Current intensity σ 1 Electric background conductivity V ana Analytical potential r Radius x, y and z Points

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Environmental impact assessment of active dumpsite in Ondo City, Nigeria: geochemical and geophysical approaches

Adebayo

Olufemi

Dasho

et al. 2023

Environ Monit Assess

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Geophysical and hydro-chemical investigation of contamination plume in a basement complex formation around Sunmoye dumpsite in Ikire, Southwestern Nigeria

Cited by 9 publications

References 7 publications

Groundwater contamination and human health risk assessment in Ikire community, Osun State, Nigeria

Groundwater contamination and human health risk assessment in Ikire community, Osun State, Nigeria

Direct current electrical resistivity forward modeling using comsol multiphysics

Environmental impact assessment of active dumpsite in Ondo City, Nigeria: geochemical and geophysical approaches

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