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. 2022 Aug 16;194(10):675.
doi: 10.1007/s10661-022-10326-y.

Evaluation of water pollution monitoring for heavy metal contamination: A case study of Agodi Reservoir, Oyo State, Nigeria

Ajibare A O  1 , Ogungbile P O  2 , Ayeku P O  3
Affiliations

Evaluation of water pollution monitoring for heavy metal contamination: A case study of Agodi Reservoir, Oyo State, Nigeria

Ajibare A O et al. Environ Monit Assess. .

Abstract

Heavy metals affect the suitability of aquatic environment for all purposes; hence, this study evaluated heavy metal contamination in Agodi Reservoir Oyo State, Nigeria. Atomic Absorption Spectrophotometry was used to determine heavy metal concentrations. Heavy Metal Pollution Index (HPI), Water Quality Index (WQI), Pollution Index (PI), Comprehensive Pollution Index (CPI), Contamination Index (CI), Single-Factor Pollution Index (SFPI), Heavy metal Evaluation Index (HEI), and Human Health Risk Assessments (HRA) were used to determine the extent of heavy metal pollution and their impact on the aquatic environment. The order of heavy metal concentrations in both wet and dry seasons was Fe > Mn > Zn > Cu > Cd > Ni > Cr > Pb > Co and Mn > Fe > Zn > Cu > Co > Ni > Cd > Cr > Pb, respectively. WQI for both wet (3182.6) and dry (3649.5) seasons classified the reservoir as "unsuitable for aquatic life." Also, the CPI rated the reservoir to be "severely polluted" in both dry (311.2) and wet (268.7) seasons. Similarly, HEI (951.3 and 2059.7) and Cd (942.3 and 2050.7) rated the reservoir as "highly polluted" in wet and dry seasons, respectively. The Hazard Quotient (HQ ingestion) was in the order of Mn > Cu > Cd > Zn > Fe > Co > Ni > Cr > Pb in the dry season while the order was Cu > Mn > Cd > Fe > Zn > Ni > Pb > Co > Cr in the wet season. The HQ ingestion revealed that Cr (0.00), Ni (0.33; 022), and Pb (0.00; 0.06) were the only metals with HQ values lesser than 1 (HQ < 1) while the values of HQ (dermal) were less 1 (HQ < 1) indicating that there was no health risk in association with the domestic use of the water. The pollution level of the reservoir means that urgent attention is needed from different agencies for the conservation, management, and sustainable development of the reservoir.

Keywords: Aquatic pollution; Ecotoxicology; Freshwater; Health risk assessments; Water Quality Index.

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References

    1. Adekunle, L. V., Sridhar, M. K. C., Ajayi, A. A., et al. (2004). An assessment of the health and social economic implications of sachet water in Ibadan, Nigeria: A public health challenge. African Journal of Biomedical Research, 7, 5–8.
    1. Adewuyi G. O., Etchie, A. T., & Etchie T. O. (2014). Health risk assessment of exposure to metals in a Nigerian water supply, human and ecological risk assessment: An International Journal, 20(1), 29–44. https://doi.org/10.1080/10807039.2012.691407
    1. Ajayi, A. A., Sridhar, M. K. C., Adekunle, L. V., et al. (2008). Quality of packaged water sold in Ibadan, Nigeria. African Journal of Biomedical Research, 11, 251–258.
    1. Alatise, I. O., & Schrauzer, G. N. (2010). A contributing cause of the current breast cancer epidemic in Nigerian women. Biological Trace Element Research, 136(2), 127–139. - DOI
    1. Ameh, E. G. (2013). Geo-statistics and heavy metal indexing of surface water around Okaba coal mines, Kogi State. Nigeria. Asian Journal of Environmental Science, 8(1), 1–8.

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