International Journal of Chemical Studies
Vol. 5, Issue 2 (2017)
Chemical speciation dynamics and bio-availability quantification of trace metals distribution in non-detrital sediments phase of Cross River Estuary, Nigeria
Author(s): IE Ekpo and C Obi
Abstract: This study describes the chemical speciation of Hg, Cr, Co, Ni, V and Mn in non-detrital phase of surface sediments from Cross River Estuary of South East Niger Delta, Nigeria. The physicochemical properties like pH, electrical conductivity and reduction-oxidation potential of sediments from ten sampling points were investigated to determine the bio-available species of these trace metals as well as its toxicity. The total concentration of these trace metals were determined by means of Atomic Absorption Spectrophotometer (AAS). The results obtained revealed a mean concentration of the trace metals in the sequence of: Hg (0.01) mg/kg < Cr (0.098 ± 0.024) mg/kg < Co (0.204 ± 0.027) mg/kg < Ni (0.467 ± 0.0930) mg/kg < V (0.53 ± 0.069) mg/kg < Mn (1.40 ± 0.41) mg/kg. The pH, electrical conductivity and reduction-oxidation potential values of 5.15 ± 0.48, 120.11 ± 87.23 µScm-1 and 34.30 ± 13.78 mV, respectively revealed that the sediments were acidic and toxic in nature. This study is useful to investigate the complete impact of these trace metals in the environment.
Pages: 08-13 | 1031 Views 30 Downloads
How to cite this article:
IE Ekpo, C Obi. Chemical speciation dynamics and bio-availability quantification of trace metals distribution in non-detrital sediments phase of Cross River Estuary, Nigeria. Int J Chem Stud 2017;5(2):08-13.