Department of Geology and Mineral Sciences

Permanent URI for this community

https://repository.crawforduniversity.edu.ng/handle/123456789/19

Browse

Now showing 1 - 6 of 6

Assessment of Heavy Metals Pollution in Sediments from Ologe Lagoon, Agbara, Lagos, Nigeria
(Journal of Geoscience and Environment Protection, 2019) Adeyemi Moyosoluwa Odunayo; Olusola Johnson Adedeji; Akpobasah Oghenemaro; Adidi Nathan Eyituoyo; Shelle Rafiu Olaniyi Dada
This study was carried out to assess the level of heavy metals pollution in Ologe Lagoon, Agbara, Lagos, Nigeria. The Lagoon receives effluents from industries in the Agbara Industrial Estate. Cored Soft sediments were retrieved from six random sampling points within the Lagoon and labeled (S1, S2, S3, S4, S5 and S6). Subsamples of the sediments were prepared and analyzed for heavy metal concentration. The result from the heavy metal analysis of the sediments shows that average concentration of Mn, Zn, Cr, Ni, Cr, Ni, Co, Cu and Pb in the samples was 278.1 ppm, 21.7 ppm, 14.2 ppm, 6.6 ppm, 6.4 ppm, 6.4 ppm and 4.4 ppm, respectively. The correlation between the heavy metals varies from 0.71 to 0.98 shows that they have a strongly positive degree of association which suggests that they are from the same source. The geo-accumulation values for Cu in all stations ranged between (1 - 2.8 ppm) and it can be deduced that the sediments are moderately to strongly polluted. Pb varies between 1 and 2.1 suggesting that the sediments are moderately polluted. Zn exhibits strong pollution levels with a range from 2.5 and 3.5 ppm. Co is moderately polluted with 1.5 - 2.4 while Mn shows the highest level of pollution in all stations with Igeo values ranging between 4.1 and 5.8. This study showed that the Lagoon accumulates heavy metals as a result of anthropogenic activities evident in the dumping of municipal, sewage, industrial waste in the environment and domestic activities such as auto mobile transportation and mechanic repair workshop. Based on sediment quality guidelines, the Ologe Lagoon level of pollution ranged from Cu > Pb > Zn > Ni > Co > Mn > Cr > Al with Mn having the highest level of pollution.
Geochemical and Mineralogical Characteristics Of Clay Deposits at Ijesha–Ijebu and Its Environs, Southwestern Nigeria
(Global Journal of Pure and Applied Sciences, 2020) Adewole John Adeola; Adeyemi Moyosoluwa Odunayo; Omojola Damilola Ifeoluwa
Two residual clay deposits and one transported clay deposit in Ijesha-Ijebu area were investigated for their mineralogical, chemical and industrial properties. The investigation was to evaluate their industrial applications and economic importance. The mineralogy of the clay samples was determined using X-ray Diffraction (XRD). The chemical composition of the clay samples was determined using Inductively Coupled Plasma-Mass Spectrometer (ICP-MS). Physical tests which include; thermal properties, plasticity tests, density measurement, linear shrinkage and water absorption capacity were determined to determine their industrial potentials. The clay within the weathered profiles above banded gneiss and pegmatite at Ijesha-Ijebu is brownish with red spots, while the clays derived from sedimentary terrain is chocolate in colour. The X-ray diffraction results showed that kaolinite is the dominant mineral, while quartz, albite and muscovite are the major non clay minerals. Chemical data showed that the values of SiO2, Al2O3 and Fe2O3 are 66.11%, 20.53% and 3.07%, respectively in weathered banded gneiss, in sedimentary the values of SiO2, Al2O3 and Fe2O3 are 42.12%, 34.43% and 7.37%. In weathered pegmatite, the values of SiO2, Al2O3 and Fe2O3 are 53.17%, 32.7%, 1.44%, respectively. The average percentage of clay in the banded gneiss, pegmatite and sedimentary samples are 50%, 56% and 47% respectively. The clay mouldability ranged between moderate to high. Evaluation of the clay properties and characteristics shows the industrial application of the clay like production of ceramic, building bricks and other structural wares.
Geotechnical and GIS-based environmental factors and vulnerability studies of the Okemesi landslide, Nigeria
(Regional Sustainability, 2023) Adeyemi Moyosoluwa Odunayo; Olaniyi Patrick Imole; Olusola Johnson Adedeji; Akintan Oluwakemi Bolanle
Landslide is a geological hazard typically associated with extreme events such as earthquakes, heavy rainfall, volcanic eruptions, changes in groundwater level, etc. This study was carried out in Okemesi-Ekiti (also known as Okemesi), Southwest Nigeria, with the purpose of using remote sensing and GIS technologies to analyze the environmental factors (grain size, direct shear strength resistance, rainfall data, wet density, surface, and slope) resulting in the occurrence of the Okemesi landslide. The study also aimed to conduct a vulnerability analysis in the study area to identify regions with a probability of landslide occurrence. The grain size analysis of the soil in the Okemesi landslide area showed that slope materials comprised 17.14% gravel, 59.31% sand, and 19.48% fines, thus the soil type could be classified as poorly graded gravely sand with a high possibility of landslide occurrence. The geomorphic characteristics of the study area was characterized by slopes ranging from 0.00 to 49.00 , while most slopes in the area were less than 8.00 . The slope aspect direction was mainly in south (157.51 –202.50 ), southwest (202.51 –247.50 ), west (247.51 –292.50 ), and north (0.00 –22.50 and 337.51 –360.00 ). The highlands were primarily bounded by the slope directions of north (0.00 –22.50 and 337.51 –360.00 ), northeast (22.51 –67.50 ), east (67.51 –112.51 ), and southeast (112.51 157.50 ), which indicated the potential direction of mass movement. The study area can be divided into three vulnerability zones: high, medium, and low, with the area percentages of 9.00%, 61.80%, and 29.20%, respectively. The analysis suggested that the Okemesi landslide was likely triggered by rainfall, which might have weakened the physical structure of slope materials. Understanding the causes and impacts of landslides is crucial for policy-makers to implement measures to mitigate landslide hazards, protect infrastructure, and prevent the loss of life in the landslide-prone regions.
Heavy Metal Speciation and Health Risk Assessment of Soil and Jute Mallow (Corchorus olitorus) Collected From a Farm Settlement in Ikorodu, Lagos, Nigeria
(Journal of Agricultural Chemistry and Environment, 2019) Adeyemi Moyosoluwa Odunayo; Akinloye Oluseyi Adeboye; Olujimi Olanrewaju Olusoji; Ogunbanjo Oriyomi Olalekan; Bada Babatunde Saheed; Makanjuola Olatunji Mojeed
There is an increasing global concern for adverse effects of inorganic fertilizer and pesticides applied to agricultural soils. This study investigated metal speciation in soil and health risk assessment of Jute mallow (Corchorus olitoriuos) from a farm settlement in Ikorodu, Lagos State. Soil samples were collected according to the set standard procedure, sequentially extracted and analyzed for selected heavy metals using standard methods. Results showed that chromium (Cr) was associated with reducible fraction (Fe-Mn) for top soil, while cadmium (Cd), manganese (Mn), and copper (Cu); lead (Pb) and nickel (Ni); and Cr were predominantly bound to carbonate, reducible and residual mineral components respectively for sub-soil. The results of Contamination Factor (CF), Contamination Degree (CD), Pollution Load Index (PLI) and Geoaccumulation Index (Igeo) showed that the soil samples were not polluted for all the investigated metals. The Cd level in the soil (13.54 ± 1.21 mg∙kg−1) and vegetables (0.83 ± 0.05 mg∙kg−1) were above the USEPA critical permissible limit of 3.0 mg∙kg−1 and 0.1 - 1.2 mg∙kg−1 respectively. The daily intake of estimated selected heavy metals from the vegetable ranged from 8.8 × 10−03 to 1.4 × 10−02 for adult and 3.8 × 10−03 to 1.1 × 10−02 for children while the Hazard Quotient (HQ) for adults ranged from 5.4 × 10−05 to 1.1 × 10−01 and that of children ranged from 8.3 × 10−03 to 1.4 × 10−02. The cancer risk (CR) values of heavy metals in the soil ranged from 1.02 × 10−11 to 9.90 × 10−10 and 4.45 × 10−09 to 8.61 × 10−09 for children and adults respectively. The level of cancer risk was below the threshold values (10−4 - 10−6) which USEPA considered as unacceptable risk. The consumption of Jute mallow grown at Ikorodu Farm Settlement is assessed to be free of risk. Hence heavy metal analysis should be included in routine soil analysis before planting.
Palynostratigraphic And Paleoenvironmental Investigation of FUNCH-1 Well, Western Niger Delta Basin, Nigeria
(Ajayi Crowther Journal of Pure and Applied Sciences, 2024) Adeyemi Moyosoluwa Odunayo; Ayorinde Oluwafunmibi Omojiade
An exploratory well (Funch-1) from the western Niger Delta was subjected to palynological analysis in order to deduce and delineate the different palynozones in the well together with their paleoenvironment and respective ages. Thirty (30) ditch cutting samples collected at intervals of 60ft from 9,390ft to 11,190ft in the well were subjected to palynological analysis. Sample preparation involved the removal of carbonate and siliceous materials. A total of forty-one (41) palynomorph species were identified, out of which Acrostichum aureum, Psilastephanocolporites sapotaceae, Gemmamonoporites sp, Psilatricolporites crassus, Verrutricolporites rotundiporus and Verrucatosporites sp. were identified as marker species. Biozonation was carried out using standard zonation scheme and one zone of pollens and spores i.e., P700 and two (2) subzones P770 and P780 were identified on the bases of the Top) and Base of the marker species. Based on the identified palynozones, the age of the interval of the well investigated is late to middle Miocene. Paleoenvironmental studies on indicate that the majority of pollen and spores are found in brackish marshes.
Potentially Toxic Elements (PTE) Pollution in Apomu Suburban Area on southwestern Nigeria
(Springer Nature, 2022-09) Adeyemi Moyosoluwa Odunayo; Olatunji Omowunmi Stella
Potentially Toxic Elements (PTE) contaminated soils within urban areas have received global attention. However, little attention is being given to soils of suburban areas, which are also vulnerable to PTE contamination from both natural and unnatural sources. This study was conducted to determine soil quality and PTE pollution sources in soils of Apomu, Southwestern Nigeria. The concentration of PTEs was determined by subjecting soils to elemental analysis using Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES). Pollution indices and health risks were calculated. The results showed the following range of metal concentrations in ppm except for Al (%) in increasing order; Mo (0.58-12.29), Cu (16.65-687.47), Pb (28.64-368.75), Zn (0-9257.30), Ni (7.60-86.20), Mn (403-1756), Cr (26.40-107), Cd (0.20-11.34), and Fe (1.23-4.29). Geoaccumulation Index (Igeo) showed that Zn, Pb, Ni and Cu and moderately contaminated with Cd. The Enrichment Factor (EF) revealed minimal to very high enrichment of Cu and Zn; minimal to significant enrichment of Pb and As and a minimal to moderate enrichment of Ni and Co. The geochemical evaluation revealed that soils were heavily contaminated with PTEs which were sourced from geogenic and anthropogenic activities. Approximately 70% of sampling areas exhibited high potential ecological concerns. The hazard index (HI) values for children and adults were less than one (HI < 1), indicating that there was no major danger of poisoning. Carcinogenic risks for Cd, Ni, and Pb were calculated and found to be within tolerable limits, but children are more susceptible to cancer and non-cancer risks than adults.

Browse

Browsing Department of Geology and Mineral Sciences by Author "Adeyemi Moyosoluwa Odunayo"

Results Per Page

Sort Options