Browsing by Author "Amoyedo, A.A."

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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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    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.