Browsing by Author "Ajao K.S"

Now showing 1 - 6 of 6
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    Characterization of a Feldspar Mineral from Adogo, Ajaokuta Deposit
    (Published by Department of Civil Engineering, University of Ilorin, Ilorin, Nigeria, 2022-09-21) AMBALI IBRAHIM OWOLABI; Shuaib-Babata Y.L; Abdulraman S.O; Busari Y.O; Ajao K.S; Yusuf O. M
    This study considered the suitability of Adogo feldspar deposit in Kogi State, Nigeria for glass and ceramic production. The feldspar's sample was characterised through analysis of its physical, chemical and mineralogical properties. The results of the physical analysis showed that the mineral has a bulk density of 1.3551 g/cm3 and tapped density of 1.5209 g/cm3, which was used to determine the compressibility index and Hausner ratio. The index shows that the powdered mineral has a good flow character. The result also revealed that the mineral has a very low percentage of moisture content (1.75%) and clay content of 2.9%. Meanwhile, the chemical analysis showed that the feldspar mineral has dominant elements of Silicon (70%) and Aluminium (20%), with 73% and 23% oxides of silicon and aluminium respectively, negligible values of other elements and oxides in the feldspar. The mineralogical analysis revealed that the feldspar deposit was of low-grade soda feldspar, while the phases present showed that the mineral was a low-grade feldspar Albite Feldspar. Though, the physical and chemical properties of the feldspar revealed the potential of the feldspar as a suitable raw material in ceramics and glass industry but further beneficiation was needed to meet suitability for the production of ceramic and glass.
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    Corrosion inhibition efficacy of hybrid organic extracts from prosopisAfricana and citrulluslanatus on mild steel in acidic medium
    (Published by Faculty of Engineering,Domneasca Street, 111, Galati, Romania, 2023-03-20) AMBALI IBRAHIM OWOLABI; Shuaib-Babata, Y.L; Ayinde I.S; Busari Y.O; Ameen M. O; Yahya R.A; Aremu I.N; Abdulraman S.O; Ajao K.S; Garuba A.A
    Each of Prosopis Africana pod extract (PAPE) and Citrulluslanatus (WMPE) performed quite well as green inhibitors in the electrochemical corrosion in acidic solution at ambient temperature in previous research. However, the hybridization of these compounds was varied with the concentration ratio in this study to optimize the efficiency of the green inhibitor in a hydrochloric acid medium using mild steel. The extraction process of the inhibitor samples was carried out with the Soxhlet apparatus using n-hexane as the solvent. Furthermore, the potential inhibition efficiency was monitored using various corrosion measurement techniques at room temperature. The inhibitive response of the extracts could be attributed to the adsorption of the extracts’ components on mild steel surface by physisorption mechanism according to the Langmuir adsorption isotherm model. The results revealed that inhibition efficiency (IE%) depends on the concentration of the extracts. The peak IE% values were obtained with a hybrid ratio of 3:1 (PAPE: WMPE) for gravimetric technique. The Tafel polarization and gasometrical measurement technique is 96.7%, 98.5% and 83.1% respectively at the concentration of 1.0 g/L, which are above the peak IE% for PAPE (93.7%, 80.96% and 77.8%) and WMPE (92.7%, 80.5% and 75.6%)
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    Performance and Corrosion Inhibitive Mechanism of Prosopis Africana Pod Extracts on Mild Steel in Acidic Medium
    (Faculty of Engineering, University of Port Harcourt, Nigeria, 2022-11-20) AMBALI IBRAHIM OWOLABI; Shuaib-Babata Y.L; Ayinde I.V; Ameen M.O; Busari Y.O; Abdulraman S.O; Ajao K.S
    This study investigates the influence of Prosopis Africana pod extract (PAPE) on corrosion behavior of mild steel in 1.0 M HCl. The Prosopis African Seed Extract (PASE) was previously characterized as a green corrosion inhibitor without considering its pod, which often constitutes environmental pollution. The PAPE solution was administered in varying concentrations of 0.0 g/ml to 10.0 g/ml as a green inhibitor of mild steel in 1M Hydrochloric (HCl) medium at room temperature using gravimetric, gasometric and electrochemical (Tafel Polarization) techniques. The volume of hydrogen evolution determined with gasometric process decreases as the concentration of the extract increases. The gravimetric technique recorded the highest inhibition efficiency (IE%) of 97.14% with a 1.0g/l concentration of PAPE. The electrochemical measurements of the corrosion current density (ICorr) decreased as the concentration of PAPE increased, with a maximum IE% of 80.59% (PAPE) at 1.0g/l recorded. Generally, IE% increases with the concentration of the extract. The decrease in the corrosion rate is caused by the intensified obstructive mechanism in the coupon surfaces instigated by the pod extract's adsorption. Hence, the extract from Prosopis Africana Pod is equally suitable as a green inhibitor for corrosion.
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    Prevalence of dental caries in public and private primary schools in Ilorin South Local Government Area of Kwara State, Nigeria
    (Arch. Clin. Res., 2018-06) Uthman M.M.B; Ajao K.S; Ahmed A; Uthman O.A; Ameen H.A; Rotimi B.F; Omojasola T.P; Oloyede H.K; Salaudeen A.G; Oladiji F; Musa O.I
    Abstract Dental caries is one of the commonest oral diseases in children, severe caries detracts from children’s quality of life: they experience pain, discomfort, disfigurement, acute and chronic infections, and sleeping and eating disruption as well as higher risk of hospitalization, high treatment costs and loss of school days with consequently diminished ability to learn. All of which can be prevented by good oral hygiene. The study compared the prevalence of dental caries and practice of oral hygiene among public and private primary schools’ pupils in Ilorin south LGA. Study was a cross sectional analytical study involving Primary School Pupils in both Private and Public Primary Schools (from primary 2-5) within the age of 5-15 in Ilorin South LGA, Kwara State, Nigeria. Multistage sampling technique was used to recruit 800 participants, 400 from public primary schools and 400 from private primary schools. Interviewer administered semi-structured questionnaire was used to collect data and evaluation technique using DMFT index. Data generated from the study was analyzed using” SPSS version 16. The level of significance was set at P< 0.05 and confidence level at 95%. Prevalence of dental caries was among all respondents was 11.0%; and significantly higher among pupils from public schools compared with private schools (68.2% versus 31.8%). There is urgent need for promotion of health education on oral health to reduce the prevalence of dental caries especially among public schools.
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    The Suitability of Using Environmental Waste (Polystyrene Foam, Sawdust and Eggshells) for Developing a Hybrid Composite for Ceiling Boards
    (Published by Faculty of Engineering, University of Nigeria, Nsukka, 2022-01-13) AMBALI IBRAHIM OWOLABI; Shuaib-Babata Y. L; Busari Y.O; Abdulraman S.O; Abdulqadir L.B; Ajao K.S; Aremu I.N; Arowolo I.O
    This study considers the suitability of using environmental wastes (polystyrene foam, sawdust and eggshell) for the development of composite materials for ceiling boards. The materials were collected from dumping sites and processed accordingly. The elemental compositions of the processed sawdust and eggshell were examined using Atomic Absorption Spectrometer (ASS) and plasma-optical emission spectrometer (Optimal 3100XL Perkin Elmer) respectively. Properties of the composite samples were determined using appropriate ASTM standards (ASTM D570, C109-95, D3479, E1530 and D7336/D7336M). The results show that the composite with a mix ratio of 5% Polystyrene, 10% sawdust and 40% eggshell exhibited the most suitable properties for ceiling board production or indoor uses in building: water absorption (0.52 and 6.17% for 2 and 24hours respectively), tensile strength (2.362 N/mm2), elongation at break (0.677 mm), compressive strength (0.1575 N/mm2), energy to break (0.016 N.m) and thermal conductivity of 0.0221 W/M.K. Thus, the production of suitable ceiling board using some bio-wastes can be domesticated in Nigeria.
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    The Suitability of Using Environmental Waste (Polystyrene Foam, Sawdust and Eggshells) for Developing a Hybrid Composite for Ceiling Boards
    (Published by Faculty of Engineering, University of Nigeria, Nsukka, 2022-01-14) AMBALI IBRAHIM OWOLABI; Shuaib-Babata Y.L; Busari Y.O; Abdulraman S.O; Abdulqadir L.B; Ajao K.S; Aremu I.N; Arowolo I.O
    This study considers the suitability of using environmental wastes (polystyrene foam, sawdust and eggshell) for the development of composite materials for ceiling boards. The materials were collected from dumping sites and processed accordingly. The elemental compositions of the processed sawdust and eggshell were examined using Atomic Absorption Spectrometer (ASS) and plasma-optical emission spectrometer (Optimal 3100XL Perkin Elmer) respectively. Properties of the composite samples were determined using appropriate ASTM standards (ASTM D570, C109-95, D3479, E1530 and D7336/D7336M). The results show that the composite with a mix ratio of 5% Polystyrene, 10% sawdust and 40% eggshell exhibited the most suitable properties for ceiling board production or indoor uses in building: water absorption (0.52 and 6.17% for 2 and 24hours respectively), tensile strength (2.362 N/mm2), elongation at break (0.677 mm), compressive strength (0.1575 N/mm2), energy to break (0.016 N.m) and thermal conductivity of 0.0221 W/M.K. Thus, the production of suitable ceiling board using some bio-wastes can be domesticated in Nigeria