Geophysical techniques for the study of ground water pollution: A review

Osazuwa, IB; Abdulahi, NK

doi:10.4314/njphy.v20i1.38168

Cited by 3 publications

(5 citation statements)

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“…Likewise [11], emphasized that inappropriate disposal can cause groundwater pollution because rainfall that penetrates the earth might contaminate it. According to [12], after some time, the waste decomposes and generates a liquid known as leachate. The leachate which comprises both biological and chemical components percolates through the subsurface materials and pollutes the groundwater (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

“…The leachate which comprises both biological and chemical components percolates through the subsurface materials and pollutes the groundwater (Figure 1). Figure 1: Showing the illustration of leachate contaminant from a dumpsite facility percolating into the groundwater as reported by [12] Consequently, dumpsites characterization, determination of possible contaminant zones and extent of pollution have been applied using some of the geophysical methods or integrated methods for perfect delineation [13]; [14]; [15]; [16]; and [17]. Furthermore, integrated geophysical techniques are used because of their capacity to provide information on thesubsurface in a timely and cost-effective manner, ranging from the level of contamination to the porosity of the materials.…”

Section: Introductionmentioning

confidence: 99%

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Application of VLF-EM response and geoelectrical sounding in groundwater investigation around an active dumpsite

Adeniji,

Ajani,

Adagunodo

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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An integrated geophysical method combining very low frequency electromagnetic (VLF-EM) and vertical electrical sounding (VES) methods were carried out around Adaland, Southwestern Nigeria, located within latitude 7° 54’ 0” and longitude 4° 43’ 0”, with a view to investigate the possible impact of dumpsite on groundwater. This is the major study in the environment to offer extensive evidence regarding the suitability of obtaining quality groundwater. In this research, eight VLF-EM and twelve VES data sets were generated, which were then used to estimate the linear structure, bedrock formation, subsurface geological characteristics, and identification of leachate pathways. The VLF-EM data were analyzed by employing Karous_Hjelt and Microsoft Excel, while the VES data were investigated using the WinRESIST software. TheVLF-EM results confirmed the presence of conductive zones, which might be due to fracture, fault and contact zones or weathered basements. The lithological units acquired from the electrical resistivity results revealed four geoelectrical layers such as topsoil, weathered-based, fractured basement and fresh basement. However, the identified weathered layers and fractured basements from the geoelectrical sections and the corresponding Karous and Hjelt (K-H) pseudo sectionresults around the dumpsite, constitute the main passages for the possible impact of the open dumpsite on groundwater quality, since leachates from the dumpsite could slowly percolate downwards from the topsoil to the water table. Therefore, the impact of the dumpsite on the groundwater is caused by the inadequate clay materials, near-surface features such as fractures/faults, and lateral in-homogeneity. Thus, integrating both methods has been recommended in site characterization for accessing quality groundwater around a dumpsite environment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of VLF-EM response and geoelectrical sounding in groundwater investigation around an active dumpsite

Adeniji,

Ajani,

Adagunodo

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…Heavy rainfall worsens the problem by accelerating waste breakdown and the ionization of inorganic materials. This process creates a highly conductive solution that readily in ltrates the surrounding soil and contaminates groundwater (Abdullahi et al, 2011;Osazua and Abdullahi, 2008). Pollutants transported by owing groundwater and diffusion through porous materials pose signi cant risks to ecosystems and human health (Ismail and Hashim, 2006).…”

Section: Introductionmentioning

confidence: 99%

Delineating Leachate Plume Migration at the Alaro Municipal Dumpsite using Electrical Resistivity Imaging

ARIYO,

Adegoke,

Bayewu

et al. 2024

Preprint

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This study aimed to map and assess the environmental degradation caused by unmanaged municipal solid waste disposal at the Alaro municipal dumpsite in Southwestern Nigeria, with a focus on leachate contamination. Electrical resistivity imaging (ERI) was applied to define the subsurface geology of the area using five resistivity profiles acquired with a dipole-dipole electrode configuration. Each electrode transect spanned 100 meters with dipole spacings ranging from 2 m to 12 m. Analysis of the uncontaminated segment of the subsurface geology revealed a three-layered geo-electric (lithologic) succession, with resistivity ranges characteristic of loose alluvium, hybrid stratum, and faulted sandstone. Significant decreases in resistivity values, from 3 Ωm to 182 Ωm, were observed around and within the dumpsite, indicating extensive surface contamination by leachate. Three contamination zones were further characterized as leachate-saturated, leachate-concentrated, and leachate-infiltrated sands. In the study area, leachate infiltration extended to a depth of 20 meters, with a marked resistivity contrast between clean and contaminated segments. The likelihood of a normal fault along the control profile further justify leachate migration concerns, highlighting the severity of environmental pollution within the Quaternary sand formation. The contaminated segment poses a significant environmental hazard, that requires immediate mitigation action. Waste recycling, biomass energy generation, and the application of geotextile materials should be prioritized to remediate the dumpsite.

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“…vinyl chloride, benzene 1,1,1-Trichloroethene); inorganic ions such as ammonium (NH4 + ), sodium (Na + ) and sulphate (SO4 2-) chloride (Cl -), and heavy metals (manganese (Mn), zinc (Zn), iron (Fe) copper, chromium (Cr), lead (Pb) and cadmium (Cd)) which are harmful. Inorganic leachate increases liquid conductivity owing to the presence of dissolved salts [7]. As a result, the electrical resistivity of leachate is often very much lower than natural groundwater (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…This substrate can pervade across the unsaturated zone and transfer pollutants to the aquifer. [7] explained that leachate from municipal dumpsites composed of dissolved organic matter (e.g. vinyl chloride, benzene 1,1,1-Trichloroethene); inorganic ions such as ammonium (NH4 + ), sodium (Na + ) and sulphate (SO4 2-) chloride (Cl -), and heavy metals (manganese (Mn), zinc (Zn), iron (Fe) copper, chromium (Cr), lead (Pb) and cadmium (Cd)) which are harmful.…”

Section: Introductionmentioning

confidence: 99%

Application of Geoelectrical Resistivity Method to the Assessment of Groundwater Pollution: A case Study of Onibu-Eja Active Open Dumpsite, Osogbo, Southwestern Nigeria

Ugwu¹,

Simon²,

Ranganai³

et al. 2016

IJEP

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Geophysical techniques for the study of ground water pollution: A review

Cited by 3 publications

References 0 publications

Application of VLF-EM response and geoelectrical sounding in groundwater investigation around an active dumpsite

Application of VLF-EM response and geoelectrical sounding in groundwater investigation around an active dumpsite

Delineating Leachate Plume Migration at the Alaro Municipal Dumpsite using Electrical Resistivity Imaging

Application of Geoelectrical Resistivity Method to the Assessment of Groundwater Pollution: A case Study of Onibu-Eja Active Open Dumpsite, Osogbo, Southwestern Nigeria

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