Browsing by Author "Fasiku, Taiwo Bukola"
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Item Aeromagnetic Methods for Mineral Exploration in Complex Geological Settings: Advances in Technology, Data Processing, and Multidisciplinary Integration-A Review(Journal of Science and Information Technology (JOSIT), 2025-05) Ogunkoya, C O; Alasi, T K; Fasiku, Taiwo BukolaAeromagnetic methods are critical for mineral exploration in geologically complex regions. This review evaluates recent advancements in sensor technology, data processing algorithms, and multidisciplinary integration to overcome challenges such as noise interference, depth constraints, and structural ambiguities, aiming to enhance exploration efficacy and sustainability. The study analyses high-sensitivity cesium vapour magnetometers (±0.052 nT), UAV systems for high-resolution surveys, and noise reduction techniques like multifractal singular value decomposition (MSVD) and improved bi-dimensional empirical mode decomposition (BEMD). Advanced 3D inversion models and integration with gravity, gamma-ray, and machine learning are assessed. Case studies from Nigeria’s mineral-rich regions, China’s 27,000 km² Nanpanjiang-Youjiang belt survey, and Korea’s UAV-based iron ore detection illustrate methodological adaptations. These methods successfully identified concealed faults and mineralized zones, with UAV surveys achieving 5 m resolution. Noise reduction improved anomaly detection by 30%, while AI-driven analysis reduced exploration risks by prioritizing high-potential targets. However, depth penetration beyond 2 km and residual noise in highly magnetic regions remain limitations. As demonstrated in Nigeria's subsurface deposit mapping, integrated approaches reduced interpretation uncertainties by 40%. Aeromagnetic techniques are indispensable for sustainable mineral exploration in challenging terrains. Future advancements should focus on AI-enhanced data fusion, quantum sensor technology for deeper targets, and environmentally low-impact UAV deployments. Collaborative frameworks combining aeromagnetics with remote sensing and deep learning are recommended to optimize resource discovery while balancing economic and ecological priorities.Item APPLICATION OF ELECTRICAL RESISTIVITY METHOD FOR SAFETY EVALUATION OF ASEJIRE DAM IBADAN, SOUTHWESTERN NIGERIA(FUDMA Journal of Science, 2024) Oladejo, Olagoke Peter; Ogunkoya, Charles Olubunmi; Fasiku, Taiwo Bukola; Olanrewaju, Surat AlabaDam construction provides economic importance to the environs through, water supply and flood control. Postconstruction investigation is however necessary for maintenance stability to avoid irreversible environmental changes. In view of this, horizontal resistivity profiling and vertical electrical sounding (VES) were conducted along the embankments and the downstream of Asejire dam to determine its integrity. The methods used were horizontal resistivity profiling and vertical electrical soundings conducted along the embankments and the downstream. Thirty-one VES and Dipole-Dipole Profiling were occupied along the embankments and downstream using Resistivity meter at 20 m intervals for both the VES and Dipole-Dipole. The Dipole-Dipole data were inverted into 2-D Resistivity Images using DIPPRO™ 4.0 Inversion Software while the VES data were quantitatively interpreted using the partial curve matching technique and Winresist 1.0 Version Software. Results of dipole-dipole image and geo-electric section identified three geo-electric layers; comprising topsoil presumably clayey sand and laterites with resistivity and thickness between 59-760 Ω m and 0.7-5.2m respectively. The second layer is weathered layer attributed with clay/clayey sand having resistivity and thickness 18-766Ωm and 3.1-36.7 m. The third layer suspected to be fresh bedrock with resistivity range 121- 3672Ωm and 18-766 m thick. The Dipole-Dipole results displayed resistivity less than 500Ωm in the first layer with structural evidence of discontinuous observables, but the underlying sequences displayed no indicative of structural weakness. This significant features play a major role in seepage processes from the dam, therefore lithological composition obtained from these results shows the dam has a good integrity.Item Determination of Naturally Occurring Radionuclides and Heavy metals in Pegmatite Rock Using Energy Dispersive X-ray Fluorescence (EDXRF)(South Asian Research Journal of Natural Products, 2023-05-20) Fasiku, Taiwo Bukola; Fasasi, Musbau Kewulere; Amosun, Adebimpe AmosThis study was to analyse pegmatite rock samples in order to determine the concentrations of naturally occurring radionuclides and heavy metals present in the samples. The samples were analysed using non-destructive Energy Dispersive X-ray fluorescence (EDXRF) spectrometer. Place and Duration of Study: This work was carried out at the Centre for Energy and Research Development (CERD), Obafemi Awolowo University, Ile- Ife, Osun State, Nigeria between September 2016 and June 2017. In this study, analysis of ten randomly selected rock samples were carried out using EDXRF to determine the concentrations of the naturally occurring radionuclides and heavy metals presence. The elements detected were divided into three groups which include: radionuclides, major and minor elements which were related together using the Pearson correlation coefficient. The EDXRF analysis confirmed the presence of U (1.54 %), Th (0.40 %), and K (7.85 %) with concentrations higher than their permissible world values of 0.0002.8 %, 0.0007.4 %, and 1.3%, respectively. The samples contained seven major elements (Fe, Mn, Pb, Ti, La, Ca, and Ta) and fourteen minor elements including some heavy metals (Zn, Sr, Zr, Cr, Nb, Mg, Ce, Re, Hf, V, Al, Nd, Sc, and Y). The results showed a large quantity of Fe with an average value of 37.67 %. The presence of natural radionuclides and toxic metals like Cr, Pb, and Mn in significant quantity in some of the samples is of serious environmental and public concern. There is an absolute possibility that the heavy metal and the radionuclides find their ways into the natural ecosystem as a result of anthropogenic activities such as mining. This could pose miners, dwellers, and the general populace to a serious health risk.Item Implementation of Energy Dispersive X-ray Fluorescence (EDXRF): Its Principle, Advantages, and Drawbacks(Journal of Multidisciplinary Sciences, 2025-12-18) Fasiku, Taiwo Bukola; Oluwasusi, Taye VictoriaEnergy Dispersive X-ray Fluorescence (EDXRF) is a widely used technique for the chemical characterisation of materials in different forms, including powders, liquids, and gases, owing to its rapid and non-destructive determination of elemental composition. This review aims to describe the underlying principle of EDXRF and to synthesise its applications, advantages, and limitations across various domains. Drawing on reported uses of EDXRF in archaeology, metallurgy, environmental science, and the food and pharmaceutical industries, the study highlights how both portable and desktop instruments have enabled efficient routine analysis and quality control. In particular, EDXRF has been instrumental in identifying gaps in production processes, especially in food and drug quality control, which in some cases, has led to the withdrawal of non-compliant products from the distribution chain. At the same time, the review underscores key limitations observed in practice, including poor detection of light elements, the impact of moisture, high background noise, spectral interference, and particle-size effects. EDXRF nonetheless offers important advantages such as minimal sample preparation, non-destructive analysis, cost-effectiveness, and operational simplicity. The review concludes that, despite these limitations, EDXRF remains a powerful tool for multi-sectoral chemical characterisation and quality control, and it recommends further development of monochromatic EDXRF configurations to reduce spectral interference, improve detection limits, and enhance analytical accuracy, thereby strengthening its role in regulatory and industrial applicationsItem Measurement of Radioactivity Concentration in Pegmatite Rock Samples and Dose Assessment from Wamba in North Central Nigeria(Asian Journal of Physical and Chemical Sciences, 2022-11-12) Fasiku, Taiwo Bukola; Fasasi, Musbau Kewulere; Amosun, Adebimpe AmosTo evaluate the radiological impact parameters on mine workers. Study Design: The research work was carried out by using a gamma–ray spectrometer with a NaI (TI) detector. Place and Duration of Study: Centre for Energy and Research Development (CERD), Obafemi Awolowo University, Ile- Ife, Osun State, Nigeria between September 2016 and June 2017. The activity concentrations of 226Ra, 232Th, and 40K were determined in ten samples which were used to evaluate the absorbed dose rate, radium equivalent activity, external and internal hazard indices, representative level index, and annual effective dose equivalent. The average activity concentrations of 226Ra (24068.11 , 232Th (387.72 , 40 K (9509.24 ) and absorbed dose rate (11720.77 ) were higher than their respective recommended world mean values of 35 , 45 , 420 and 59 by UNSCEAR. The mean values of radium equivalent activity, external hazard index (Hex), internal hazard index (Hin), representative level index, and annual effective dose equivalent of the area under study were determined as 25346.82 , 68.52, 135.43, 357.95, and 14374.36 respectively. This study revealed that all the radiological parameters were higher than their respective recommended world average values. With the high concentrations obtained in this study, it is therefore concluded that this may pose a serious health risk to the miners and the general public. It is therefore advised that necessary guidelines should be provided for the exploration of minerals in this mining site.Item Numerical Investigation of Turbulent Convective Heat Transfer of Distilled Water Flowing in Corrugated Converging Pipes(Ajayi Crowther Journal of Pure and Applied Sciences, 2026-03-17) Fasiku, Taiwo Bukola; Amosun, Adebimpe Amos; Awodunmila, Ayobami JeremiahThis study examined the turbulent heat transfer performance, the Poiseuille number, and the performance evaluation criterion (PEC) of distilled water flowing in corrugated converging pipes. It systematically investigated the effects of the amplitude of the corrugation (0.02 ≤ 𝑒⁄𝐷 ≤ 0.03) and the Reynolds number (0.5 × 104 ≤ 𝑅𝑒 ≤ 4.0 × 104) on both thermal and flow fields. The governing equations and boundary conditions were numerically solved using the Shear Stress Transport (SST) turbulence model. The results indicated that as the corrugation amplitude increased, the average Nusselt number (𝑁𝑢), the normalised average Nusselt number (𝑁𝑢𝐺), the Poiseuille number (𝑓𝑅𝑒), the normalised Poiseuille number (𝑓𝑅𝑒𝐺), and PEC increased. At 𝑅𝑒 = 4.0 × 104, 𝐷𝑅 = 1.2, 𝑤 𝐷 = 0.2 and 𝑒 𝐷 = (0.02, 0.025 & 0.03), the average Nusselt numbers were 348.48, 360.69 and 368.78, respectively. The corresponding 𝑓𝑅𝑒 values were 4407.89, 4502.67, and 4571.15, respectively. The 𝑁𝑢𝐺 values at 𝑅𝑒 = 1.5 × 104 for 𝑒⁄𝐷 = 0.02, 0.025 & 0.03 were 1.36, 1.46 and 1.52, respectively. The 𝑓𝑅𝑒𝐺 values at 𝑅𝑒 = 3.0 × 104 for 𝑒⁄𝐷 (0.02, 0.025, and 0.03) were 3.16, 3.22 and 3.27, respectively. The corrugated converging pipe enhanced 𝑁𝑢 compared with a smooth pipe for all the pipe configurations considered, as revealed by 𝑁𝑢𝐺 > 1.Item Optimisation of laccase production by Curvularia verruculosa UDY through solid-state fermentation using response surface methodology(Discovery, 2026-04-07) Fasiku, Samuel Adedayo; Oladunni, Atilade Amos; Fasiku, Taiwo Bukola; Ernest, Godswill Uduak; Adeogun, Opeyemi Janet; Afolabi, Femi JohnsonLaccases are multicopper oxidase enzymes with significant industrial and environmental applications, including bioremediation, textile dye degradation, and biosensor development. This study aimed to optimise laccase production under solid-state fermentation using Response Surface Methodology (RSM) and to utilise the produced laccase for dye decolourisation. The laccase-producing fungus was molecularly identified. Parameters, including incubation period, pH, substrate concentration, inoculum size, and carbon sources, were optimised using RSM. The model equation was generated using Design Expert, and the model's statistical significance was evaluated using analysis of variance (ANOVA). Laccase was quantified using 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) as a substrate. The effect of environmental conditions on laccase activity was determined, and the enzyme was used to decolourise dyes. The laccase-producing fungus was identified as Curvularia verruculosa UDY (accession number PV669996). The optimum laccase yield (735 µU/L) was observed with sugarcane bagasse as the substrate on a basal medium containing a glucose carbon source, at an initial pH of 3, with an inoculum size of 2 fungal plugs, over a fermentation period of 10.5 days. All cations tested enhanced laccase activity, with Mn²⁺ producing the greatest stimulation (1056 µU/mL). At various pH levels, the highest laccase activity (898 µU/mL) of C. verruculosa UDY was observed at pH 9.5, while activity at different temperatures peaked (943 µU/mL) at 60°C after 40 min. Laccase decolourised Congo red by 22% within 2 hours. The production of laccase by C. verruculosa UDY through solid-state fermentation was optimised. Cations, pH, temperature, and time affected laccase activity, and the produced laccase decolourised dyes, which could promote the utilisation of agrowastes for industrial enzyme production as well as laccase decolourisation application in the textile industry.Item Study of Optical and Electrical Properties of Carbon Nanotubes (CNTS) Thin Film Deposited by Spray Pyrolysis Method for Optoelectronics Application(Dutse Journal of Pure and Applied Sciences, 2025-09) Oluwasusi, T V; Gurku, U M; Alayande, S O; Babalola, V A; Fasiku, Taiwo Bukola; Eneye, J; Sarki, M U; Idris, M M; Mundi, A A; Aribisala, A; Adeleye, M OCarbon nanotubes (CNTs) are novel material with exceptional optoelectronics properties. CNTs thin films have been used in many different applications. Despite its vast potential, particularly as a promising alternative to indium tin oxide (ITO) and silicon in transparent conducting films, research on CNT thin film remains surprisingly limited. This study creates CNT thin films at 0.1 M and 0.2 M concentration using the spray pyrolysis technique. This technique was used due to its low cost and its ease of use. The optical and electrical characteristics of CNTs thin films created on the sodalime glass substrates at 350 oC were studied in relation to precursor concentration. Ultraviolent Spectrophotometer (UV) and Four-Point Probe Technique characterized the thin films. With rising precursor concentration, CNTs thin films' optical band gap energy decrease. With rise in precursor concentration, the films' transmittance and electrical conductivity grow. The result of the study concludes that concentration has effect on the optical and electrical properties of CNTs thin films and that the high electrical conductivity, high transmittance, low absorbance and low optical band gap energy of the films makes it useful in optoelectronics devices.Item The influence of corrugation amplitude on entropy production of turbulent flow in outward corrugated converging pipes(Discovery, 2026-03-18) Fasiku, Taiwo Bukola; Awodunmila, Ayobami JeremiahThis study investigated the entropy production rate of turbulent distilled water flowing through three corrugated converging pipes of various corrugation amplitudes. The impact of the corrugation amplitude (0.02 ≤ 𝑒⁄𝐷 ≤ 0.03) and Reynolds number (0.5 × 104 ≤ 𝑅𝑒 ≤ 4.0 × 104) on entropy production rate (EPR) and Bejan number were examined. The finite volume method was utilised to solve the governing equations and the turbulent model (SST 𝑘 − 𝜔 model), taking into account the boundary conditions stated in the ANSYS Fluent. The findings showed that increasing the corrugation amplitude and Reynolds number reduces the thermal entropy production rate, 𝑆𝑡ℎ𝑒𝑟, compared to a straight pipe. On the contrary, as the aforementioned parameters increase the viscous entropy production, 𝑆𝑣𝑖𝑠𝑐, increases. Therefore, using corrugated converging pipe with enhance corrugation amplitude reduces the entropy production rate compared to a straight pipe.