Department of Geology, University of Ibadan, Ibadan, Nigeria


  • Original Article   
    Enrichment of trace elements in urban soils and sediments in a typical sedimentary environment; Onitsha metropolis southeastern Nigeria
    Author(s): Timothy Iyobosa Asowata* and Akinade Shaddrach Olatunji

    This study was carried out to evaluate the concentration, spatial distribution, and fate of potentially harmful elements in soils and sediments in Onitsha metropolis [N=162]. The samples were air-dried, sieved and digested with Aqua regia prior to elemental analysis using ICP-MS. Five [5] potentially harmful elements [Pb, Zn, As, Cd, and Mn] were selected for geoenvironmental assessment. A five-step sequential extraction was carried out to ascertain the fate of these selected elements in the soils and sediments. Elemental concentrations revealed that Pb ranged from 7.2 ppm-2026.0 ppm; Zn, 3.0 ppm-8395.0 ppm; As, 0.5 ppm -27.3 ppm, Cd, Undetected-10.3 ppm and Mn, 10.0 ppm -2127.0 ppm. Elevated concentrations of these elements were found in soils when compared to the sediments. The result also revealed that there was a marked variation between the metal concentrations in the topsoil c.. Read More»
    DOI: 10.14303/2591-7641.1000015