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Journal17 Jun 2026
Test Manuscript
An assessment of soil and groundwater quality in the oil spill affected parts of Agbura, Bayelsa State, Nigeria, was carried out to evaluate the concentration of key physicochemical parameters and determine the level of contamination in the area. Soil and groundwater samples were collected from five boreholes drilled to 6m depth at distances ranging from 100m to 500m from the primary oil spill site. Results of laboratory analysis indicate that the groundwater pH and electrical conductivity (EC) were within World Health Organisation (WHO) and Environmental Guidelines and Standards for the Petroleum Industry in Nigeria (EGASPIN) limits with values ranging from 6.1 to 6.9 and 37.45to257.38uS/cm respectively. Turbidity was higher than the recommended standard, and biochemical oxygen demand (BOD) exceeded acceptable limits across all samples. Total petroleum hydrocarbon (TPH) levels varied from 0.2310 to 0.9382 mg/l, with values at the impact site significantly above regulatoryvalues. Heavy metals such as Fe and Pb were found in concentrations surpassing recommended limits in most of the samples analysed. The water quality index (WQI) revealed that thegroundwater quality deteriorated closer to the spill site, with samples from the impact site classified as "unsuitable" and"poor," while samples away from the spill site were classified as "good." Soil analysis showed TPH concentrations that ranged from 0.294 to 1.0661 mg/kg, with levels decreasing with depth and distance from the spill site. Other heavy metals showed variable contamination patterns, influenced by proximity to the spill. These findings highlight significant contamination of groundwater and soil, particularly near the spill site, emphasizing the need for continuous monitoring and remediation efforts in the study area.
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Proceedings30 Dec 2024
Proceedings of the sixth international conference of the NAEGE
NAEGE conference proceedings: Proceedings of the sixth international conference of the NAEGE.
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Proceedings30 Dec 2024
Proceedings of the fifth international conference of the NAEGE
NAEGE conference proceedings: Proceedings of the fifth international conference of the NAEGE.
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Proceedings30 Dec 2024
Proceedings of the fourth international conference of the NAEGE
NAEGE conference proceedings: Proceedings of the fourth international conference of the NAEGE.
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Proceedings30 Dec 2024
Proceedings of the third international conference of the NAEGE
NAEGE conference proceedings: Proceedings of the third international conference of the NAEGE.
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Proceedings30 Dec 2024
Proceedings of the first and second international conference of the NAEGE
NAEGE conference proceedings: Proceedings of the first and second international conference of the NAEGE.
Read MoreJournal27 Dec 2024
Engineering geology and the Sustainability of structures and the environment: The Edunabon Manuscripts
A special NAEGE publication featuring the valedictory lecture in honour of Professor Gabriel Oladapo Adeyemi.
Read MoreJournal27 Dec 2024
Soil and Groundwater Quality Assessment in Oil Spill Areas of Agbura, Bayelsa State, Nigeria
An assessment of soil and groundwater quality in the oil spill affected parts of Agbura, Bayelsa State, Nigeria, was carried out to evaluate the concentration of key physicochemical parameters and determine the level of contamination in the area. Soil and groundwater samples were collected from five boreholes drilled to 6m depth at distances ranging from 100m to 500m from the primary oil spill site. Results of laboratory analysis indicate that the groundwater pH and electrical conductivity (EC) were within World Health Organisation (WHO) and Environmental Guidelines and Standards for the Petroleum Industry in Nigeria (EGASPIN) limits with values ranging from 6.1 to 6.9 and 37.45to257.38uS/cm respectively. Turbidity was higher than the recommended standard, and biochemical oxygen demand (BOD) exceeded acceptable limits across all samples. Total petroleum hydrocarbon (TPH) levels varied from 0.2310 to 0.9382 mg/l, with values at the impact site significantly above regulatoryvalues. Heavy metals such as Fe and Pb were found in concentrations surpassing recommended limits in most of the samples analysed. The water quality index (WQI) revealed that thegroundwater quality deteriorated closer to the spill site, with samples from the impact site classified as "unsuitable" and"poor," while samples away from the spill site were classified as "good." Soil analysis showed TPH concentrations that ranged from 0.294 to 1.0661 mg/kg, with levels decreasing with depth and distance from the spill site. Other heavy metals showed variable contamination patterns, influenced by proximity to the spill. These findings highlight significant contamination of groundwater and soil, particularly near the spill site, emphasizing the need for continuous monitoring and remediation efforts in the study area.
Read MoreJournal27 Dec 2024
Assessment of Natural Geohazards in the Niger Delta Coast, Nigeria
The coastal zone is a dynamic environment under hydrodynamic forcings and adverse consequences of geohazards with potential for disasters. In this this studies, ASTER DEMs and LandSat 4,5 imageries have been analyzed in ArcGIS to determine the amount and rates of coastal subsidence, shoreline movements and coastal erosion and supplemented with secondary tide and wave data to model wave conditions in the face of climate change. Results indicates that the average ground subsidence was -2.6m at a rate of - 0.144m/yr. on the Bayelsa coast and -3.75m at a rate of -0.208m/yr on the Rivers coast. The rate of coastal erosion along the Akwa Ibom, Rivers and Bayelsa States in the Niger Delta coastline depicts a linear erosion of -13,054m, -17,519m and -81,532m in Akwa Ibom, Rivers and Bayelsa respectively with erosion rates of -5.5m/yr along Akwa Ibom, -7.2m/yr along Rivers and -11.1m/yr along the Bayelsa coastline. The net shoreline retreat equivalent of incidental erosion was -8,590m along the Akwa coastline, - 9,240m along Rivers coastline and -70,383m along the Bayelsa coastline. Modeled hydrodynamics parameters predicted waves with mean wavelength of 178.95m, wave celerity of 13.01m/sec, group wave celerity of 11.27m/sec with maximum horizontal velocity of 0.4m/sec exerting an energy flux of 15, 902.00w/m. In considerations the stack realities of climate change, vulnerability assessment, integrated coastal zone management and climate change adaptation strategies for coastal protection are recommended.
Read MoreJournal27 Dec 2024
Groundwater Contamination due to the Activities of Auto - Mechanics in Lagos Metropolis, South-western Nigeria
The release of wastes generated from the activities at automobile workshops leads to heavy metals contamination of groundwater which can be harmful to human health. The study is aimed at investigating the physicochemical and heavy metal contamination of groundwater from three automobile workshops at Super, Jankara and Kola areas located at Alimosho, Ifako - Ijaye and Agege Local Government areas of Lagos State. Fifteen (15) samples were collected from residential houses near the automobile workshops, at 5m - 75m depth and taken to Federal Institute of Industrial Research (FIIRO) laboratory at Oshodi, Lagos. Electrical conductivity (EC), pH, temperature and total dissolved solids (TDS) were measured onsite using a 107 model pH meter. The samples were analysed for lead, magnesium, manganese, cadmium, arsenic, chromium and mercury using Atomic Absorption Spectroscopy; Perkin Elmer model Analyst 3000.The TDS value of all the samples in this research ranged from 0.017 mg/l - 0.097mg/l which is within the W.H.O. standards of 500mg/l. The pH value of all the analysed groundwater samples ranged from 4.4 - 7. This implied that groundwater in the study area are slightly acidic to neutral. The groundwater samples from JW03 are below the acceptable pH limit of W.H.O while the groundwater from the remaining 14 sampling points have pH values less than 6.5, hence, they are slightly acidic. Only two sampling points in Jankara; JW06 and JW07, falls within the W.H.O acceptable limit while the remaining samples have values lower than 6.5. The electrical conductivity in the water analysed ranged from 0.72 uS/cm - 194 uS/cm. The electrical conductivity value of all the water samples analysed are below the W.H.O standard of 1000uS/cm. This result reflects a low input of solute in the groundwater. The temperature values of the groundwater samples of the three areas of the research ranged from 26.8 degrees C - 37.8 degrees C with a median value of 30.2 degrees C. The values exceeded that of W.H.O limit of 25 degrees C. The concentration of heavy metal in groundwater of the three mechanic workshops are in this trend; Pb>Mn>Cd>Cr. Arsenic was not detected in all the groundwater samples from the three mechanic workshops. The metal Pb have a range of 0.382 mg/l - 1.895mg/l and an average of 1.070mg/l, Mn ranged from 0.067 mg/l - 2.0933mg/l with an average of 0.7468mg/l, Cd ranged from 0.146 mg/l - 0.5937mg/l with an average of 0.36mg/l while Cr ranged from 0.036 mg/l -0.098mg/l with an average of 0.060mg/l.
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