Browsing by Author "Saleh, S.A."

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    Integration of Heavy Metal Indexes and Health Risk Assessment in Groundwater Studies in Urban Area of Port Harcourt, Niger Delta Region of Nigeria
    (Anchor University, 2024) Osisanya, W.O.; Akpeji, B. H.; Agho, I.O.; Saleh, S.A.; Oyanameh, O. E.
    The Niger Delta region of Nigeria is faced with a serious environmental hazard from heavy metal (HM) pollution in groundwater, mostly as a result of local oil corporations' operations within the communities and its suburbs.. Physical characteristics such as pH, and Ec, heavy metals (Fe, Pb, Mn, As, Ni, Co, Cu, Zn, and Cr) were measured in 17 groundwater samples that were collected. The influence of heavy metals on groundwater chemistry is revealed by the principal component analysis (PCA) analysis results. According to the child population's dermal techniques, findings showed that 6 % of samples with low risk, 41 % with medium risk, and 51 % with high risk. Yet, 29 % of adults are at medium risk and 71 % of adults pose insignificant to low risk. According to the evaluated Carcinogenic Risk (CR) scores of the groundwater samples that were considered in this study, there was a very high propensity to effect the development of cancer in consumers, including adults and children. The research area's Heacy Metal Pollution Index ( HPI) ranges from 7.15 to 63.08with an average value of 27.16 according to the HPI data. This suggests that there is generally safe water because the HPI throughout the research area is below 100. Fe was found to be positive in 12 (70.59%) samples (FET/01,02,03,07,08,10,11,12,14,15,16, and 17) and zero in 5 (29.41%) samples (FET/04/05/06/09,13) based on the results of the Quantification of Contamination (QoC).For Ni, 58.82% of samples (FET/01, 02, 03, 08, 09, 10, 11, 12, 14, and 16) had negative QoC scores, while seven (41.18%) samples (FET/04, 05, 06, 07, 13, 15, and 17) had positive QoC scores. These findings underscore the urgent need for continued groundwater monitoring and implementation of effective purification technologies before consumption to mitigate health risks associated with heavy metal contamination in the Niger Delta region.. The present investigation concluded that this location's groundwater needed to have its HM level measured
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    The Use of Acoustic Doppler Current Profiler (ADCP) to Determine the Water Velocity as Related to Sediment Deposition in Epe Lagoon, Lagos State, Nigeria
    (European Centre for Research Training and Development UK, 2025-03-24) Iluobe, O.E.; Osisanya, W.O.; Saleh, S.A.
    Sediment deposition poses significant challenges to marine transport, aquatic ecosystems, and hydrogeological exploration. This study investigates the integration of Acoustic Doppler Current Profiler (ADCP) data with grain size analysis to estimate sediment deposition velocities in a lagoonal environment. Data from ten ADCP measurements revealed varying velocities, with the highest at 7.70 ft/s and the lowest at 0.99 ft/s. Analysis of ADCP data indicated high velocity zones at depths of 21 to 27 ft and 12 to 19 ft, while low velocities were observed at shallow depths (up to 18 ft) and near the bottom at specific locations. Concurrent grain size analysis identified a predominance of coarse-grained sand, with varying degrees of sorting from moderately well to poorly sorted sediments. The results demonstrated that areas of high sediment velocity are associated with larger grain sizes, whereas low velocity zones correspond to finer grains. This study suggests optimal navigation routes for vessels around the lagoon’s middle and recommends dredging edges to mitigate sediment accumulation. These insights provide valuable guidance for sediment management, coastal engineering, and marine transportation safety.