Advanced Journal of Environmental Science and Technology

Advanced Journal of Environmental Science and Technology ISSN 2756-3251, Vol. 15 (11), pp. 001-010, November, 2024. Available online at www.internationalscholarsjournals.org © International Scholars Journals

Full Length Research Paper

Speciation of Metals in Sediments of Aiba Reservoir, Iwo, Nigeria: Implications for Aquatic Ecosystem Health

Godwin Oladele Olutona*, Olapeju Gifty Aribisala and Emmanuel Adewuni Akintunde

Department of Chemistry and Industrial Chemistry, Bowen University, P.M.B. 284, Iwo, Nigeria.

Accepted 14 June, 2024

The species and total mean metal concentrations of some potentially environmental toxic metals (manganese (Mn), iron (Fe), copper (Cu), zinc (Zn), and lead (Pb)) in the sediments of Aiba reservoir were examined. The total mean value were in the order of Fe > Mn > Zn > Cu > Pb. The metal concentrations (mean ± standard deviation (SD) in µg/g dry weight) were Mn, 28 ± 0.88; Fe, 42.03 ± 1.11; Cu, 5.82 ± 0.21; Zn, 11.91 ± 0.37; and Pb, 0.44 ± 0.02. Some physico-chemical parameters of the bottom sediments were also measured and their average levels and range are pH, 6.2 to 6.6; conductivity, 104 5 µScm-1 (50 to 170 µScm-1); water absorbency, 54.66 ± 2.17 (50 to 63.3). The speciation result revealed that high levels of these metals studied (Mn, Fe, Cu, Zn, and Pb) were associated with exchangeable and carbonate bound fractions, pointing out that they are in potentially available forms and may pose serious problems to the reservoir ecosystem.

Key words: Bottom sediments, speciation, Aiba reservoir, metals.