http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/142 2026-05-02T23:19:25Z 2026-05-02T23:19:25Z Ibrahim, M. Tsafe, A. I. Gungshik, J. R. Abdulkarim, A. M. Zhikpe, Y. B. Bisiriyu, M. T. http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/27693 2024-04-30T16:34:57Z 2024-04-04T00:00:00Z

Title: Assessment of Foliose Epiphytic Lichen (Parmelia sulcata) as Bioindicators of Atmospheric Trace Metals Pollution in Lapai Metropolis, Niger State Authors: Ibrahim, M.; Tsafe, A. I.; Gungshik, J. R.; Abdulkarim, A. M.; Zhikpe, Y. B.; Bisiriyu, M. T. Abstract: The levels of atmospheric trace metals were determined using foliose epiphytic lichens (Parmelia sulcata) samples collected in eight (8) different locations within the residential areas and two control locations outside the residential area of Lapai town in Lapai local government of Niger State. A stratified random sampling technique was adopted and the analysis of the samples with atomic absorption spectrophotometer (AAS) gives the concentration (mg/kg) range of the metals as follows; 1.123-7.837 for Fe, 4.579-6.62 for Pb, 0.210-2.152 for Cr, 0.491-1.171 g for Ni, 0.018-0.983 for Cd, 0.057-1.471 g Zn, 0.198-1.287 for Mn, and 0.098-2.583 for Cu but Selenium was not detected in all the samples. The levels of some of these metals were slightly higher than the recommended USEPA (1993) limits but lower than FEPA (1991) limits. However, the distribution of these metals was not uniform across the samples, though their level was still at the background and very low compared to the reports on similar studies from industrialized areas of South-south and South-west Nigeria and other European countries. The variation in concentration of these metals at p≤0.05 indicates their source is mainly anthropogenic in origin. Epiphytic lichens validate the cost-effectiveness of this method for evaluating, assessing, and identifying depositional sources of the metals in the environment. The study revealed the atmospheric trace metal concentration of the area under study to be at a threshold level and hence the environment is still very safe from atmospheric trace metal pollution.

2024-04-04T00:00:00Z Alheri, A. Ago, M. A. Jamila, U. A. Anyanwu, S. K. Bisiriyu, M. T Aisha, K. U. http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/27692 2024-04-30T16:22:18Z 2024-01-16T00:00:00Z

Title: Production of biodiesel from Balanite aegyptiaca seed oil using chemical-activated catalyst produced from coconut shell Authors: Alheri, A.; Ago, M. A.; Jamila, U. A.; Anyanwu, S. K.; Bisiriyu, M. T; Aisha, K. U. Abstract: Heterogeneous catalyst produced from coconut waste shell (CWS) via chemical activation was utilized for biodiesel production from Balanite aegyptiaca seed oil. The effects of impregnation ratios (2 – 10 g/cm3), activation temperatures (500 – 900 oC) and time (1 – 3 h) on the yield of catalyst were investigated. The chemical-activated catalyst produced from coconut shell was characterized by Scanning Electron Microscopy (SEM) and Fourier Transform Infra-Red (FT-IR) spectroscopy. The biodiesel was further characterized using GC-MS. The heterogeneous catalyst produced by chemical activation under the following optimum conditions: activation temperature (800 oC), impregnation ratio (3:6g/cm3), and reaction time (1 h) was of high yield. SEM images showed a highly porous characteristic, with lots of cavities and strands on the surface. The optimum conditions to achieve maximum yield of the biodiesel (82.9%) were reaction temperature (40 oC), methanol/oil molar ratios (9:1 cm3), catalyst concentration (1.0 g/cm3) and reaction time (60 min). The fuel properties of biodiesel produced by chemical activation catalyst were: kinematic viscosity (5.70 mm2/s), specific gravity (0.86), pour point (9 oC), flash point (185 oC), cloud point (9 oC), colour 1.0 and cetane number 62. The GC-MS analysis demonstrated the presence of decanoic acid methyl ester, hexadecanoic acid, methyl ester, 4-hexenoic acid methyl ester and pentadecanoic acid methyl ester. The study showed that chemically produced heterogeneous catalyst from coconut waste shell can be used for the production of biodiesel.

2024-01-16T00:00:00Z Mathew, J. T. Adetunji, C. O. Inobeme, A. Musah, M. Shaba, E. Y. Azeh, Y. Francis, A. O. Mamman, A. http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/27438 2024-04-25T05:08:01Z 2022-01-01T00:00:00Z

Title: Organic Compounds in Atmospheric Aerosols Authors: Mathew, J. T.; Adetunji, C. O.; Inobeme, A.; Musah, M.; Shaba, E. Y.; Azeh, Y.; Francis, A. O.; Mamman, A. Abstract: Organic compounds in the atmospheric aerosols and suspended particulate matter (PM) are a vital component of the atmosphere. Most of these compounds are volatile which affects their transport and distribution in the atmosphere. The presence of these compounds has become an issue of serious concern in recent times due to their toxic impact on human health and the environment at large, and their indispensable role as a driving force for various environmental issues. Polyaromatic hydrocarbons, polychlorinated compounds and some other components have been proven to be mutagenic and carcinogenic. Organic aerosols have also been reported to significantly affect climate and visibility. This chapter critically reviews organic compounds in the atmospheric aerosol. It discusses the occurrence and sources of these compounds, classes of organic compounds in aerosols, their impact on the environment and human health, recent reports on their distribution and concentrations in atmospheric aerosols. An attempt is also made at highlighting the future trends in this regard. Description: Book

2022-01-01T00:00:00Z Shaba, E. Y. Jacob, J. O. Tijani, J. O. Suleiman, M. A. T http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/27437 2024-04-25T05:02:02Z 2021-01-01T00:00:00Z

Title: Effect of Calcination Temperature on the Crystallite Size and Morphology of Zinc Oxide/Polivynl Nano-Composite Synthesized Via Sol-gel method. Authors: Shaba, E. Y.; Jacob, J. O.; Tijani, J. O.; Suleiman, M. A. T Abstract: ZnO/ polyvinyl pyrrolidone nanocomposites were synthesized from zinc nitrite (as a precursor) and polyvinyl pyrrolidone as a stabilizing by sol-gel method at pH of 11 and ambient synthetic temperature. The synthesized ZnO/polyvinyl pyrrolidone (ZnO/PVP) nanocomposites were subjected to different calcination temperatures (ambient 300°C, 500 °C, and 700 °C). The synthesized ZnO/ polyvinyl pyrrolidone nanocomposites were characterized by X-ray diffraction (XRD), High resolution Scanning electron microscopy (HRSEM), Energy-dispersive X-ray spectroscopy (EDS), and X-Ray Photoelectron Spectroscopy (XPS). The XRD results revealed the crystallite size calculated using the Scherrer equation was 160.96 nm, 10.74 nm, 13.33 nm, and 16.52 for the ambient, 300°C, 500 °C, and 700 °C respectively. The result indicates the synthesis of the hexagonal wurtzite structure of ZnO. The HRSEM shows spherical structures of the nanocomposites. It is observed that at a low temperature, the stoichiometric ratio between Zn and O atoms has a significant deviation from the perfect ratio of 1:1and becomes optimized as the temperature increases as sown by the EDS result. Description: book

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