Browsing by Author "Omotoso, Oladele Ajiboro"

Now showing 1 - 4 of 4
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    Environmental Impact Assessment of Oluyole Industrial Estate Activities on River Ona Water, Ibadan, Nigeria: Implications to Human Health Risk.
    (2024) Omotoso, Oladele Ajiboro; Ojo, Olusola Johnson; Alebiosu, Mercy Titilayo; Uwais, M.A.; Fadayin, F.A; Adesoba, A.S; Ede, O.E; Asalu, D.O.; Abodugbe, O.O.; Ganiyu, T.O; Olelewe, M.C.; Olaosebikan, Q.O.
    Environmental impact assessment of Oluyole Industrial Estate activities on river Ona water at Ibadan and its relation to human health risk have been investigated using carcinogenic and non-carcinogenic health parameters. Flame-photometry-technique was used to analysis some of the toxic metals from the water samples taken from the study area. Results shown that Fe, Mn, Ni, Pb and Cd had concentrations higher than WHO standard and their CF are >1 with very high Deg.C. The adults’ Exping (for Copper, Iron, Manganese, Nickel, Lead and Zinc) computed are >1 while < 1 for all other metals in children except for Co and Cd respectively. The Hazard Quotient calculated for Pb in adults are >1 and the corresponding Hazard Index are generally >1 (that is, of high chronic risk). The HQ of Fe, Mn, Ni and Pb calculated for children are generally >1 in the industrial areas compared to the upstream (except Pb that also has values >1) which are less than 1. The HI are >1 which also depicts high chronic risk. The CDII is >1. CRing values are greater than prescribed limits of 10-4 and 10-6 respectively. As the cause of elemental elevations for Fe, Mn, Ni, Pb and Cd in the water is being controlled mainly by the effluents being discharged by the industries, the rock weathering processes also controlled Cr, Cu, Zn and Cu in the water has illustrated by the value of CF. Hence, the water is both non-carcinogenic and carcinogenic toxic risks to human health.
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    Preliminary Investigation of Petrographic and Geochemical Characteristics of Crystalline Rocks in Jebba Central Nigeria
    (2019) Omotoso, Oladele Ajiboro; Ojo, Olusola Johnson; Aina, I.O; Udeafor, J.I.; Alebiosu, Mercy Titilayo
    The preliminary investigation of petrographic and geochemical characteristics of crystalline rocks in Jebba, central Nigeria was carried out in order to establish the various rock types in the area. Petrographic studies were carried out using thin sections of the rock samples and geochemical analysis was carried out using X-ray Fluorescence (XRF) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Field mapping indicated that the area is underlain by granite (porphyritic granite), granite gneiss, quartzite and schist. The petrographic studies indicated the main mineral assemblages in the crystalline rocks as; quartz, plagioclase, microcline and biotite. Results of geochemical analysis established SiO2 and Al2O3 as dominant major oxides in the investigated rocks ranging from 46.66 to 97.6 wt. % and 0.25 to 17.48 wt. % respectively. Average values of CIA (Chemical Index of Alteration), PIA (Plagioclase Index of Alteration) and CIW (Chemical Index of Weathering) of the rocks are 59.2, 65.0 and 72.8 (granite gneiss); 58.4, 62.9 and 70.6 (granite); 67.7, 79.9 and 83.3 (quartzite); 57.9, 61.4 and 66.4 (schist) respectively. The intensive weathering of the rocks would have contributed to the concentration of metals in the water phase of the study area. Most of the rare earth elements in granite gneiss are highly enriched with respect to abundance in the earth crust having values greater than 1ppm while granite and quartzite are depleted in these elements.
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    PRELIMINARY STUDY OF HYDROCHEMISTRY OF ELEYELE LAKE AND ITS TRIBUTRIES, IBADAN, NIGERIA
    (Faculty of Science, Adamawa State University, Nigeria, 2011) Omotoso, Oladele Ajiboro; TIJANI, Moshood
    Hydrochemical evaluation and distribution of major and trace metals in water of Eleyele Lake and its feeding streams (tributaries) within Ibadan, south-western Nigeria is presented in respect of anthropogenic and geogenic contaminations from the surrounding catchments. The aim of the study is to delineate the degree of concentration of metals in the water phase. ICP-OES method was used for the hydrochemical analysis. The results revealed no practical contamination of these metals in terms of its domestic usability in both the tributaries and the main Lake because the values are below W.H.O. standard for potable water. The AF values are less than 1 and the Igeo- values less than 0. However, the average values of Sodium Absorption Ratio (SAR) recorded in the feeding stream (tributaries) is 10.6 and 5.9 in the main Lake. This is an indication of potential problem for irrigation water. Furthermore, the major metals have good correlation coefficient values (>0.6) with one another. This shows their close associations and could be attributed to their geogenic sources from the catchments’ bedrock. Some of the trace metals show negative correlation with the major metals, TDS and the EC. This reflects different sources and controlling processes. The water is suitable for domestic purposes rather than Agriculture because of the Na + level contamination as revealed by the SAR value
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    Stable Isotopic Signatures (18O and 2H) and Hydrochemistry in Assessing Basement Aquifer Recharge and Driving Forces of Groundwater Quality in Parts of Ilorin, Northcentral Nigeria
    (University of Technology Sarawak, 2025-01-14) Yusuf, Mumeen Adebayo; Abiye, Tamiru Alemayehu; Alao, Joseph Omeiza; Ibrahim, Kehinde Olojoku; Oyeleke, Tolulope Ayobi; Awujo, Emmanuel Daberechukwu; Omotoso, Oladele Ajiboro; Iheme, Kenneth Obinna,; Bakare, Ussein Taiwo; Omorinoye, Omolayo Ajoke
    Groundwater resources in parts of Asa Local Government Area in Kwara State, Nigeria are threatened by increasing pressure due to growing population, and agricultural and industrial activities, which necessitates a comprehensive assessment of the groundwater resources to ensure their sustainability and safety for human consumption. Evaluation of groundwater resources in parts of Asa Local Government Area in Kwara State, Nigeria was undertaken using the integration of stable isotope of δ18O and δ2H and hydrogeochemical tools including Water Quality Indexes, Gibbs diagrams, and Chadha diagram towards deciphering the source of groundwater recharge as well as factors controlling its chemistry in the study area. The collected groundwater samples from shallow wells and deep boreholes were subjected to major ions, trace elements, and isotope analyses. Hydrochemical models revealed Ca-Mg-HCO3, mixed Ca-Na-HCO3, and Na-HCO3 water facies suggesting the early transformation stage of the groundwater. The WQI indexes ratings revealed essentially fair to good to excellent water quality for human consumption. The isotope values in groundwater samples vary between - 4.12±0.1 ‰ and -2.60±0.1 ‰ and between -15.0±0.2 ‰ and -24.0±0.2 ‰ for δ18O and δ2H, respectively, indicating isotopically relatively enriched groundwater. The plot of δ18O and δ2H in groundwater samples along meteoric lines indicate meteoric origin with little effect of evaporation. Residence time evaluation using Ec and δ18O relationship identified recent recharge and recent recharge but polluted groundwater. In addition, the relation between salinity and δ18O revealed water-rock interaction as the main geochemical process controlling groundwater chemistry.