Browsing by Author "Olelewe, M.C."

Now showing 1 - 3 of 3
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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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    GEOSTATISTICS AND MULTIVARIATE ANALYSIS OF HYDROGEOCHEMICAL PARAMETERS OF ELEYELE LAKE, IBADAN, SOUTH WEST NIGERIA
    (Published by Faculty of Physical Sciences, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria., 2021) Iheme, K.O.; Olelewe, M.C.; Omotoso, O. A.; Okolo, C.J.; Atanu, O.
    Evaluation of Eleyele Lake and Wetland, Ibadan South Western Nigeria was carried out to acertain the contamination state of the water bodies. 29 water samples were collected from the lake and its effluents streams, and were geochemically analzyed using Inductively Coupled Plasma-Mass Spectrometery (ICP-MP) while the pH, total dissolved solids (TDS), and electrical conductivity (EC) were measured insitu during the sampling operations. Values of pH, TDS, EC, and metals with significant concentrations in the samples were selected as variables used for geostatistical analysis, and multivariate analysis; principal component analysis (PCA) and hierarchical cluster analysis (HCA). Comparison of geostatistical analysis result with Nigerian Standard for Drinking Water Quality, shows that EC, TDS, iron (Fe), and aluminum (Al) concentration were above the recomended limits in many locations. PCA results show that the first 2 principal components accounts for 79.7% of the variability or information in the samples. PC scores clearly revealed two clusters which was indicative of where the water sample was collected; Lake or Tributary/effluent streams. Hierarchical clustering identified three clusters of samples but subsequent piper digram of the clusters revealed that clusters 2 and 3 were more alike and less contaminated by sodium (Na) compared to water samples in cluster 1.
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    Preliminary Health Risk Assessment in Relation to Some Trace Elements in Ogunpa River, South-Western Nigeria
    (LAUTECH Journal of Civil and Environmental Studies, 2021) Omotoso, O.A.; Ojo, O.J.; Ige, O.O.; Olaleye, I.M.; Adewoye, O.A.; Olelewe, M.C.
    Ogunpa River receives municipal and industrial waste discharge from its catchments and these have depleted the quality of the water. Hence, this research examines the preliminary environmental impacts and health implications of some trace elements in the water using Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) laboratory technique. Average values of Al, Ba, Fe, Mn, Ni and Pb are above the recommended limits of WHO. The CF showed that the trace elements varied from considerable contamination factor to very high contamination factor and the degree of 4contamination varied from 1023 to 11640. The hazard quotient computed for the adults is generally less than unity except Pb that has average value of 1.27. In children, the computed hazard quotient on the average ranges from 0.000572 to 4.04. Al, As, Ba, Cr, Cu, Ni, Zn and Cd have their average values less than unity respectively, while Fe, Mn and Pb has their average values greater than one. The Hazard Index (HI) in adults and children are greater than one. Carcinogenic risk assessment was computed for Cr, Pb and Cd which was greater than 10-6 in children and adult. Only Cd in adult was less than the prescribed limit of 10-6. Effort should be made to checkmate indiscriminate dumping of refuse and sewages into the water body as these could serve as pollutants to other adjourning rivers and main water bodies. In conclusion, the water is not fit for domestic, agricultural and probably industrial uses because of its health implications on consumption