Geophysical and geochemical assessments of the environmental impact of Abule-Egba landfill, southwestern Nigeria

Fatoba, Julius O.; Eluwole, Akinola Bolaji; Sanuade, Oluseun Adetola; Hammed, O.S.; Igboama, Wilfred N.; Amosun, Joel Olayide

doi:10.1007/s40808-020-00991-8

Cited by 18 publications

(9 citation statements)

References 6 publications

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“…The similarity of the data in the two profiles and the absence of low depth anomalous zones show the decreasing effect of the contamination plumes on the subsoil and the subsurface environment as one move away from the dump to the North, due to the natural process of attenuation by dilution and dispersion of the plumes in the natural receiving basin. Similar situations have been described in areas around several dumpsites in Africa, Morocco by El Mouine et al [59] and Touzani et al [47], Nigeria by Fatoba et al [60] and Burkina Faso by Barry et al [61]. Zone 1 -Profile 4 (a) from the beginning to 120 m shallow shows zones with anomalous resistivities.…”

Section: Geophysical Studies (Electrical Resistivity)supporting

confidence: 77%

“…The spatialization of the plumes shows that as one moves away from the dump the anomalies tend to disappear (profile 3), suggesting the attenuation of the contamination by the local lithology. The role of lithology and groundwater in the attenuation of contamination by leachate plumes in the surrounding of waste dumps has been described in many studies for example by Fatoba et al [60] and Biosca et al [63]. The application of the electrical resistivity method to the study of the dynamics of contamination plumes around the Hulene -B waste dump has proved to be efficient in identifying anomalous areas of low resistivity that we consider as leachate production and contamination plume migration zones in lithological substrates and surface and groundwater.…”

Section: Spatial Distribution Of Possible Leachate Plumes (2020-2021)mentioning

confidence: 99%

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Characterisation of the Dynamics of Leachate Contamination Plumes in the Surrounding of the Hulene - B Waste Dump, Maputo, Mozambique

Bernardo¹,

Candeias²,

Rocha³

2021

Preprint

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The contamination of areas around solid urban waste dumps is a global challenge for the maintenance of environmental quality in large urban centres in developing countries. This study applied geophysical methods (electrical resistivity) to identify leachate contamina-tion plumes in the subsoil and groundwater, as well as to describe their temporal (2020 and 2021) dynamics in the lithology and groundwater around the Hulene - B waste dump, Maputo, Mozambique. Geophysical methods (electrical resistivity) were applied to identify possible groundwater contamination plumes, their dynamics, mechanisms of their enrichment and dispersion. Eight 400 m electrical resistivity profiles were performed, four profiles in January 2020 and four profiles in May 2021, overlapped, and the data were inverted with RES2D software. The electrical resistivity models indicate an E - W move-ment of large contamination plumes that dilute superficially into the natural surface wa-ter receiving basin and groundwater, creating zones of resistive anomalies. The thickness of the plumes in the subsurface environment was shown to be extensive in summer for profiles 1a and 2b and we associate it with the higher leachate production and migration mechanisms, which are intense in the hot and rainy season. Profile 4b showed the prop-agation of anomalous surface and subsurface areas, which was associated with higher leachate production and migration process in the new deposition zone (west). The spatial distribution of contamination plumes at both stations reduced significantly as we moved further away from the waste deposit, revealing the attenuating effect of groundwater and lithological substrate (Profile 3 a, b, and fig.7).

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Section: Geophysical Studies (Electrical Resistivity)supporting

confidence: 77%

Section: Spatial Distribution Of Possible Leachate Plumes (2020-2021)mentioning

confidence: 99%

Characterisation of the Dynamics of Leachate Contamination Plumes in the Surrounding of the Hulene - B Waste Dump, Maputo, Mozambique

Bernardo¹,

Candeias²,

Rocha³

2021

Preprint

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“…Hussein et al (2021), found that soils with high EC values were associated with high soil contamination, by As, Cd, Pb and Cr in a study of 6 dumpsites in Malaysia. Similar findings byWu et al (2021), on a study of waste dumps in China, andFatoba et al (2021) on a waste dump in Nigeria, with contamination by metalion enriched leachates.…”

supporting

confidence: 73%

“…These properties represent a major role in the fixation, adsorption, and absorption of heavy metals (Feng et al 2021;Yap et al 2022). Factors such as pH, organic matter (OM), moisture, color, texture, and electrical conductivity (EC), are pointed as relevant to assess contamination processes (Fatoba et al 2021;Hussein et al 2021). Soil pH has a major influence on heavy metal solubility (Sparling 2020).…”

Section: Introductionmentioning

confidence: 99%

Soil properties and environmental risk assessment of soils in the surrounding area of Hulene-B waste dump, Maputo (Mozambique)

2022

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Soils in areas surrounding landfills are constantly being enriched by heavy metals contained in the leachates, which can subsequently migrate to groundwater. The present investigation aims to characterize soil properties of 71 soil samples collected in the surroundings of Hulene-B waste dump and to determine the landfill pollution index (Ip). Soils properties studied were texture, pH, electrical conductivity, organic matter, color, and moisture. Results revealed that soils properties in the surroundings of Hulene-B waste dump were significantly altered when compared to local background. Ip index classified these soils with very high pollution, indicating a possible migration of contaminants to subsoil and groundwater, suggesting the need for intervention to mitigate the impact.

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“…Therefore, detailed assessment of MSW dumpsites is one of the most common demands in growing urban areas which should be carried out by identifying the buried waste and delineating its geometrical dimensions, determining its geochemical characteristics (potentially toxic elements and compounds), and especially tracing the sub-surface migration pathways of leachate plumes from one medium to another within the ecosystem. For this purpose, geochemical and geophysical techniques have widely been used [10,11].…”

Section: Introductionmentioning

confidence: 99%

Geophysical and Geochemical Characterization of Solidwaste Dumpsite: A Case Study of Chowa Gujar, Peshawar (Part of Indus Basin)

et al. 2022

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Open and non-engineered dumping is a typical method for solid waste disposal in most cities of Pakistan. This practice of waste dumping poses a serious threat to the surrounding ecosystem and human population due to the release and transport of decomposed organic matter, i.e., leachate from dumpsite into the groundwater. The present study was conducted over a non-engineered and open dumpsite (Chowa Gujar), located in the outskirts of the highly populated city of Peshawar by using integrated geophysical techniques such as electrical resistivity tomography (ERT) and ground-penetrating radar (GPR) and geochemical techniques. The main goal was to delineate the characterization and depth of buried waste, to map the subsurface extension of contaminant plumes towards agricultural land and groundwater table and the concentration of heavy metals (HMs) in dump and agricultural soil. Geophysical results showed that the thickness of buried waste (predominantly composed of domestic waste) was around 4 m and the leachate plumes have percolated to the adjacent agricultural land. A range of heavy metals (mg/kg) such as Cr (20.5–26.6), Cd (2.6–5.7), Pb (0.35–21.25), Ni (2.5–53.05), Cu (29–68.3), Zn (45.7–77), and Co (18.9–23.2) have been found in the agricultural land adjacent to the dumpsite. The findings demonstrated that combined use of ERT and GPR successfully characterize the buried waste and spread of pollutant plumes spatially and vertically from Chowa Gujar dumpsite. The anomalous geophysical signatures were confirmed by geochemical characterization. The movement of leachate plumes towards agricultural land and groundwater table and the concentration of HMs in soil show that Chowa Gujar dumpsite is a potential source of contamination not only to the surrounding population but also to the agricultural land, surface (Bara River), and subsurface water bodies. In the study region, there is an urgency to take remediation and mitigation measures to reduce the level of pollution created by the dumpsite.

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Geophysical and geochemical assessments of the environmental impact of Abule-Egba landfill, southwestern Nigeria

Cited by 18 publications

References 6 publications

Characterisation of the Dynamics of Leachate Contamination Plumes in the Surrounding of the Hulene - B Waste Dump, Maputo, Mozambique

Characterisation of the Dynamics of Leachate Contamination Plumes in the Surrounding of the Hulene - B Waste Dump, Maputo, Mozambique

Soil properties and environmental risk assessment of soils in the surrounding area of Hulene-B waste dump, Maputo (Mozambique)

Geophysical and Geochemical Characterization of Solidwaste Dumpsite: A Case Study of Chowa Gujar, Peshawar (Part of Indus Basin)

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