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Articles by I.B. Obioh
Total Records ( 2 ) for I.B. Obioh
  F.M. Adebiyi , F.S. Olise , O.K. Owoade , I.B. Obioh , T.R. Ajayi , H.B. Olaniyi and O.I. Asubiojo
  Ethylenediamine Tetra-acetic Acid (EDTA) extractable metals were determined in soils of bituminous sands occurrence area of Agbabu in southwestern Nigeria using Total reflection x-ray Fluorescence (TXRF) technique. Soil samples were collected at two different depths (0-50 and 50-100 cm) along a transverse line cutting across the main road in the study area. Fourteen metals; K, Ca, Ti, Mn, Fe, Ni, Cu, Zn, Rb, Sr, Ce, Eu, Au, Pb and Co were detected in all. However, Co, Pb and Ni were not detected in samples from 0-50 cm depths and Pb and Rb in some samples from 50-100 cm depths. The concentration, mean, range, standard deviation and correlation coefficients were calculated for the detected metals. Moderate correlations were found to exist between K, Ti, Ni, Zn, Rb and Sr; very high correlations between Ca, Cu Pb and Au in 0-50 cm depth samples. In the 50-100 cm depth samples, moderate correlations were observed between Ca, Cu and Zn; between Fe, Ti, Co and Ni. Pb was found to be highly correlated to Ca, Ti, Ni and Sr. This study provides a pre-exploration baseline data in the region and the need for the extension of such a baseline analysis to other environmental sensitive media-water resources, crops and local air quality in the region is emphasized.
  I.B. Obioh , F.S. Olise , O.K. Owoade and H.B. Olaniyi
  Total Reflection X-ray Fluorescence (TXRF) technique was used to analyze Suspended Particulate Matter (SPM) collected by gravimetric sampling along air corridors of motorways in Lagos and Ile-Ife, Nigeria. Up to 16 elements were identified and quantified. The Toxicity Potentials (TP) for SPM were high for all sampling sites in the two cities, except for a residential site in Ile-Ife whose TP value is 0.43. For lead (Pb), the TP values were high for all the sites in Lagos and low for all sites in Ile-Ife, except for one bus stop site in the latter city. Because of the health implication of high lead burden in the atmosphere there is need for improved management of the transport sector, possibly through the introduction of integrated transport system to reduce the current over-dependence on road transport as well as the need for gradual phase-out of leaded gasoline in Nigeria.
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