School of Biological Sciences

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Browsing School of Biological Sciences by Author "Ezejiofor, T. I. N."

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    Genotoxicity of hairdressing salon effluent using allium cepa
    (U. P., 2020) Okereke, J. N.; Dike, Ijere. N.; Ukaoma, A. A.; Ezejiofor, T. I. N.
    Genotoxicity of hairdressing salon effluent using Allium cepa was carried out using different concentrations of 12.5%, 25%, 50% and 100% of hairdressing salon effluent obtain from different outlets. The presence and concentrations of some heavy metals such as lead, Mercury, Zinc, Cadmium and Arsenic in the effluent were determined using Atomic Absorption Spectrophotometer (AAS). Chromosomal aberration assays were used to determine the mitotic index and chromosome aberration rate. There was an increase in the mitotic inhibition as the concentration increased whereas there was a decrease in the mitotic index, indicative of an inverse relationship shared by the two properties. The effluent induced chromosomal aberrations in the meristematic cells of the A. cepa root tip, and laggards were the most frequently recorded aberrations induced. Morphological abnormalities were also recorded in the roots of the Allium cepa. The genotoxic effects of hairdressing salon effluent on Allium cepa indicates that it contains toxic substances which may constitute environmental risks particularly on soils and plant crops planted near hairdressing salon facilities.
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    Underground water quality of rock mining in Ishiagu, Ebonyi State, Nigeria
    (2006-06) Obiekezie, S. O.; Okereke, J. N.; Anyalogbu, E.; Okorondu, S. F.; Ezejiofor, T. I. N.
    Physicochemical and bacteriological analysis of underground water of Crush Rock mining pit in Ishiagu, Ebonyi State Nigeria were carried out to determine the pollution level and the potability of the groundwater due to mining and human activities. The results were compared with standards for water pollution and World Health Organization for drinking water. The results showed that total dissolved solids (TDS), total alkalinity, calcium and sodium, which had concentration ranges of 126-986ppm, 200.18-615.55ppm, 7.8- 30.10ppm and 64-88ppm respectively, were above standards. However, the mean concentration of dissolved oxygen (DO) (1.2-3.20ppm) was below the standard. Other parameters measured were found to be within the permissible acceptable standard. Pseudomonas, Chromabacterium, Bacillius, Escherichia, Staphylococcus, Flavobacterium, Micrococcus, Citrobacter, and Achromobacter species were identified as the major bacteria isolated from the underground water. The study revealed that the underground water from Crush Rock mining pit in Ishiagu Ebonyi State, Nigeria require some chemical and physical treatment as it is unsafe for human consumption.