Browsing by Author "Amoyedo, A.A."

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    Assessing Environmental Impact and Socioeconomic Consequences of Oil and Gas Spillage on Soil in Warri, Southern Nigeria
    (European Centre for Research Training and Development UK, 2023) Shaibu, B.O.; Osisanya, W.O.; Amoyedo, A.A.; Akpeji, B.H.
    The Niger Delta terrain is often prone to environmental degradation resulting from oil and gas spillage. This research aims to assess the environmental impact of oil and gas spillage on the soil of Warri, Southern Nigeria, by utilizing physicochemical properties, statistical analysis, and socioeconomic information to evaluate the impact of heavy metals in the study area. A total of six (6) soil samples were collected and examined with the aid of an atomic absorption spectrometer (AAS) using a procedure that adheres to World Health Organization (WHO) standards. Concentration levels of Sodium (Na), Potassium (K), Calcium (Ca), Magnesium (Mg), Exchangeable Acidity (EA), Exchangeable Cation Exchange Capacity (ECEC), Total Petroleum Hydrocarbons (TPH), Zinc (Zn), Copper (Cu), Iron (Fe), Cadmium (Cd), and Lead (Pb) were analyzed and found to range from (21.1-74.98) ppm, (23.46-105.57) ppm, (1281442) ppm, (58.80-341.60) ppm, (0.25-13.50) ppm, (11.51-14.78) ppm, (11.30-226.34) mg/kg, (98.26 122.60) mg/kg, (10.10-18.43) mg/kg, (321.86-994.04) mg/kg, (0.26-0.50) mg/kg, (0.4-1.15) mg/kg, respectively. The research revealed that the soil pH ranged from highly acidic to slightly acidic, which can negatively affect nutrient availability and plant growth. The research also highlighted the detrimental impact of oil spillage on the health, livelihood, amenities, and socioeconomic state of affected communities. Agricultural produce, crop yield, and livestock production were negatively affected due to poor soil fertility and damage to water bodies. Basic amenities were polluted, leading to abandonment and contamination of drinking water. The social environment of these communities experienced setbacks in occupation, income, and education. The findings provide valuable insights into soil characteristics and contamination levels and also show that regular soil quality monitoring and assessment are essential to detect any degradation in soil quality in the examined area.
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    Heavy metal content and health risk assessment at Akri waste dumpsite, Niger Delta Region of Nigeria
    (Springer Nature, 2024-03-18) Agho, F.I.; Osisanya, W.O.; Ighrakpata, C.F; Amoyedo, A.A.
    In most parts of the world, solid waste management is a serious worry and unsolved problem, particularly in poor countries, where solid waste is dumped in unregulated dumpsites in public spaces. This research aims to provide a comprehensive understanding of the contamination levels, sources, and associated health risks in the groundwater around the Akri solid waste dumpsite. The methodology involves a combination of field sampling, laboratory analysis, and statistical techniques to draw conclusions about the current state of groundwater quality and propose recommendations for future actions. This method has the potential to contaminate environmental compartments, such as soil, surface water, and groundwater, putting human health at risk. Groundwater samples were taken from 18 locations in and near the Akri solid waste dumpsite in Warri, Nigeria, for physicochemical analysis following the American Public Health Association (APHA) set standard. Principal component analysis (PCA) results revealed that that the loadings in components were essentially from enduring or potentially filtering of loess. The correlation index witnessed poor correlation within elements. Contamination factor values of less than 1 were observed in the entire study area except for Fe which had values ranging from moderate contamination to extremely high contamination. Pollution load index (PLI) values had values of less than one, implying low pollution. Metal Pollution Index (MPI) values in the entire samples had their concentration levels less than 0.3. The values of Pollution Index of Groundwater (PIG) showed that the entire samples within the study area were below 0.1. Contamination Index values showed that the entire water samples ranged between clean water to heavy polluted water, especially boron (Br) and Iron (Fe). Furthermore, the hazard quotients (HQ) reported that the non-carcinogenic risk posed by drinking water containing trace metals for both children and adults in the research area is in the trend of As > Fe > Ni > Cu > Cr > Pb > Br > Hg. It was observed that anthropogenic activities are the major cause of heavy metals in groundwater within the study. Regular appraisal of groundwater sources is highly recommended.
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    Integration of 2D and 3D Electrical Resistivity Tomography for Volumetric Investigation of Geologic Formations in a Sedimentary Terrain
    (International Journal of Earth Sciences Knowledge and Applications, 2023) Murphy, O.I.; Osisanya, W.O.; Avwenaghegha, O.J.; Korode, A.I.; Amoyedo, A.A.
    In a wide variety of research fields, including agriculture, botany, road construction and mineral exploration, it is crucial to analyse the volume of dominant geologic formations in an area especially those of very high economic importance. Volumetric evaluation of geologic formations is an essential stride towards economic and local content development. Ten (10) 2D geoelectrical resistivity profiles were gathered in parallel and perpendicular equidistant lines using the Wenner array with maximum electrodes spread of 200m to investigate the subsurface geological stratification in both the vertical and horizontal direction at Obaretin community in the Edo State, Nigeria. Using Earth Imager 2D software, 2D resistivity-depth models were created from the 2D resistivity dataset with the use of wenner aray. In order to create a 3D depth slice and a 3D block model for the subsurface stratification, the survey dataset was compiled into a single 3D data set and inverted using Res3Dinv software and Voxler 4.0 programs. The 2D resisitivity imaging results revealed three geo-electric major layers at Obaretin, which are indicative of topsoil, silt sand, clayey sand, and lateritic sand with sandstone intercalations as the dominant geologic formations in the study area. The Resistivity lithology of the study area also showed three geo-electric subsurface layers to an appreciable depth of 40 m for Silt sand, topsoil (299–1791 Ωm), lateritic sand with sandstones intercalations (985–3253 Ωm), and clayey sand (48.9–1791 Ωm) were delineated. The study revealed that the dominant formations are laterite, silt sand and clayey sand which showed an estimated volumetrics of 373,508m3, 520,320 m3 and 194,800 m3 per two million m3 respectively which are in high economic quantities. Hence, the adoption of 2D and 3D electrical resistivity imaging has aided the successful volumetric assessment of geologic formations which are of high economic value in the study area.
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    SEDIMENTARY DEPOSITIONAL SEQUENCE AND PETROPHYSICAL PROPERTY ANALYSIS FROMWELL LOGS OF ‘WONDER’ FIELD, COASTAL SWAMPDEPOBELT, NIGER DELTA
    (Zibeline International Publishing, 2024-03) Ishola, E.O.; Osisanya, W.O.; Korode, A.I.; Amoyedo, A.A.
    In the Niger Delta's "WONDER" field, seven wells were thoroughly examined. The petrophysical characteristics of the sequences were determined using sequence stratigraphy, and the lithostratigraphic settings were modeled. Utilizing Schlumberger Petrel Software and Microsoft Excel, well logs and reservoir sands (RES A, RES B, and RES C) were analyzed, and petrophysical parameters were calculated. Biostratigraphic plots of the varieties of foraminifera in the reference well (WON 12-ST1) showed three sequences. These were found by matching log trends with depositional settings. There were three maximum flooding surfaces and four sequence boundaries. All of the sequences were classified as type-1, and there were three system tracts: transgressive (TST), highstand (HST), and lowstand (LST). In the HST and LST, prograding and aggrading sands with diminishing shale volume uphill were combined with retrograding shale and sand units. In the LST, TST, and HST, hydrocarbon buildups were discovered based on resistivity log data and calculated hydrocarbon saturation values. Average petrophysical parameters showing different shale volumes, total porosity, hydrocarbon saturation, and permeability ranges were calculated for RES A, RES B, and RES C over the seven wells. Examples of these ranges were found in Reservoir A, where the permeability measured 6978–8391 mD, the hydrocarbon saturation ranged from 51–59%, and the amount of shale ranged from 9–14%. This research provides crucial insights into the sedimentary patterns and hydrocarbon potential of the "WONDER" field in the Niger Delta.