Browsing by Author "Amu OO"

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    Human health risk evaluation of sodium and ironic elements variability in ground water: A case study of Abuja North, Nigeria
    (2022) Amu OO; Amu EO; Igibah EC; Agashua LO
    Harmful substance tends to come into water bodies through geodesic and human-induced sources, therefore persistent drinking water monitoring schemes are crucial. The goal of this paper was to estimate the human health threat posed through high sodium and iron accumulation in borehole water used for both consumption and domestic activities. As this will help in the prevention of water-related sicknesses and maintenance of good health for human being that rely on water to survive. Specially, rural region need to be enlightened about biochemistry of the mineral elements ingested, since excessive intake of some minerals can upset homeostatic balance and cause toxic side effects. For instance, excess sodium ingestion ensuing from daily intake of saline origins is associated with high blood pressure, while excess iron intake can stimulate liver impairment or brain damage which connected to aging and protein-misfolding neurodegenerative ailments. More importantly, when an individual suffering from a chronic sickness take prescriptions with water of unknown quality as human being believes that groundwater possess safe water quality, the health situation becomes worst. In this paper, iron accumulation in borehole water varied at distinct sites, span between 0.01 mg/L and 2.95 mg/L with a mean value of 1.02 mg/L whereas that of sodium range from 55.98 mg/L to 515.45 mg/L with mean value of 260.19 mg/L. The Hierarchical cluster scrutiny revealed three common clusters wherein the samplings could be grouped. The non-carcinogenic threat was calculated and the Total Threat Index above 1.0 for sodium ingestion in the scrutinized sites was gotten from all locations.
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    Hydro-geochemical autographs, attribute indicators and health threat evaluation of Fluoride and Ironic elements variability in ground water in Abuja North-central Nigeria
    (2022) Igibah EC; Amu OO; Agashua LO; Adetayo OA
    Tap water from twenty-five houses using private water sources, in an area of ironic and fluoride mineralization (Abuja, Nigeria), was evaluated so to ascertain the extent of conformity with chemical clean water quality criterions, and how this is inspired through householder water treatment resolutions. The percentage of analyses surpassing water quality criteria were high, with 67% of tap water samples above one or more chemical criterions. The greatest exceedances for health-established criterions were iron (44%) and fluoride (40%). The concentration of iron in borehole water varied at different sites, between 0.01 mg/L and 2.95 mg/L with an average value of 1.02 mg/L while that of fluoride ranged from 0.47 mg/L to 1.84 mg/L with an average value of 1.28 mg/L. The Hierarchical cluster analysis revealed three common clusters in which the samples may be grouped. The carcinogenic threat was calculated with defined procedures by USEPA considering ingesting and dermal pathways. The CDI values for iron and fluoride varied from 6.80E-04 to 0.20 and 8.33E-02 to 0.12 for children, while adults’ index was 9.17E-04 to 1.56E-02 and 5.56E-02 to 1.44E-02, respectively. For Total Threat Index (TTI), adults and children are below 1.0 for both iron and fluoride in all the examined locations.
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    Mechanical behaviour of composite produced with quarry dust and rice husk ash for sustainable building applications
    (2022) Taiwo LA; Obianyo II; Omoniyi AO; Onwualu AP; Soboyejo AB; Amu OO
    Over the years, the cost and environmental issues with the utilization of conventional building materials such as cement and river sand for housing projects kept increasing with the increase in the human population. This has led researchers to explore alternative building materials that are affordable and sustainable. This study is aimed at developing a sustainable composite using quarry dust (QD) and rice husk ash (RHA). Different percentages of QD and RHA (5%, 10%, 15%, 20% and 25% wt/wt) were used for the partial replacement of river sand and cement respectively to produce non-conventional composite samples and conventional composite samples were produced using cement and river sand. The produced composites were moulded into block samples and cured at different curing ages (7, 14, 21, 28 and 56 days). Compressive strength results of the block samples were obtained using a Universal testing machine. The compressive strength of the samples increased with an increase in the curing age. The bulk density of non-conventional composite samples was found to be lower than that of conventional composite samples. The failure pattern of the conventional composite samples showed several localized shear surfaces/multiple cracks while that of non-conventional composite samples indicated delamination of outer surfaces. The study indicates that QD and RHA could be used for partial replacement of river sand and cement respectively in developing sustainable building materials.