Browsing by Author "Aleku, L.D."

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    Effects of Landuse Activities on Groundwater Suitability for Irrigation Purposes in Lafia Municipal, North Central Nigeria
    (Department of Geology and Minning, Nasarawa State University Keffi, 2019-03-08) Aleku, L.D.; Obrike, Stephen E.; Anuda, G.K.; Umbugadu, A.A.
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    Hydro-geochemical characterization and water quality appraisal of groundwater in areas adjoining primordial landfills in the Maastrichtian Lafia Formation, Middle Benue Trough
    (Department of Geology and Minning, Nasarawa State University Keffi, 2012-07-06) Obrike, Stephen E.; Aleku, L.D.; Anuda, G.K.
    This study assessed the groundwater quality in areas adjoining primordial landfills in Lafia town and its suitability for drinking purposes. Physico-chemical properties of twenty groundwater samples collected from boreholes, unlined and lined hand-dug wells at twenty different locations around three dumpsites were analysed for the appraisal of the water quality. Results of measured physical parameters show pH values in the range of 5.13–7.30, electrical conductivity (EC) values as between 89 and 7754 µS/cm and total dissolved solids (TDS) values that ranges from 59.63 to 5195 mg/L. The major cation and anions have mean concentrations in the order Ca2+ > Na+ > K+ > Mg2+ and SO42− > HCO3− > Cl− > CO3−. The Piper plot reveals three dominant water types (Ca–Cl–SO4, Ca–Na–HCO3−, and Na–Cl–SO4). Heavy metal pollution assessment reveals relatively higher modified heavy metal index (m-HMI) values for wells of close proximity to the landfills. The water quality index (WQI) classification reveals 35% of the groundwater sampled locations have water categorized as unsuitable for drinking purposes, 30% of the groundwater samples categorized as very poor and 25% of the groundwater samples classified as poor. While groundwater categorized as good to excellent constituted only 10% of the total groundwater samples analysed.
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    Stream Sediments Investigation of Heavy Metals at Nasarawa State University Keffi, Part of Keffi Sheet 208 NE, Central Nigeria
    (Department of Geology and Minning, Nasarawa State University Keffi, 2018-06-05) Mamza, C.B.; Jatau, B.S.; Ancho, M.I.; Aleku, L.D.
    Stream sediments investigation was carried out at Nasarawa State University Keffi and its environs, part of Keffi Sheet 208 NE, Central Nigeria. The Basement Complex rocks of the area consist of biotite gneiss, granitic gneiss and schist. Structures such as joints, veins and foliations were observed, trending mostly in NE-SW and NNW-SSE directions. Fifteen (15) stream sediments were sampled systematically (500 m interval) at a depth of 15cm along three (3) stream channels and analysed for heavy metals. Results obtained revealed the following trend of ranges: Fe 20.44-318.17 mg/l, Cu 0.02-0.24 mg/l, Zn 0.06-1.13 mg/l, As 0.00-1.81 mg/l and Pb 0.00-0.58 mg/l; with mean values of 156.58 mg/l, 0.10 mg/l, 0.30 mg/l, 0.37 mg/l and 0.19 mg/l respectively. The high relative abundance of Fe, Zn, Pb, Cu and As in the soil could be due to weathering of the host or underlying rocks. Also, these metals could be leached from the soil and other anthropogenic sources which could include; indiscriminate disposal of chemicals/waste water around the Entrepreneurship Development Centre (EDC), sewage sludge emanating from the old cotton company located in Angwan Lambu, chemicals from the fertilizer warehouse in Angwan Lambu and farms located uphill. The dominance of heavy metals in the sediments samples is in an order of Fe>Zn>As>Cu>Pb, Fe>As>Zn>Cu>Pb and Fe>Pb>Zn>Cu along the channels of stream 1, 2 and 3 respectively