Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 20, Issue 3, 2018; Page No.(701-707)

HUMAN HEALTH RISK ASSESSMENTS OF HEAVY METAL CONTAMINATION THROUGH CONSUMPTION OF PERIOPHTHALMUS PAPILIO, ELEOTRIS SENEGALENSIS, HANNOICHTHYS AFRICANA AND HOPLOBATRACHUS OCCIPITALIS FROM BENIN RIVER, KOKO, NIGERIA

IDOLOR, JEFIA JOHN AND EDEMA, CLARKSON UDUN

Abstract

Human health risk assessments of heavy metal contamination through consumption of mudskipper (Periophthalmus papilio), rough mudfish (Eleotris senegalensis), smooth mudfish (Hannoichthys africana) and aquatic tiger frog (Hoplobatrachus occipitalis) in Benin River was studied. Assessment of heavy metal (Cadmium, Chromium, Copper, Iron, Lead, Manganese, Nickel, Vanadium and Zinc) concentrations in whole tissues of fish and frog were determined using Atomic Absorption Spectrophotometer (AAS). The levels of heavy metals in whole tissues of E. senegalensis, H. africana and P. papilio in decreasing order was Fe > Zn > Mn > Cu > Pb > Cr > Cd, while the heavy metal levels for H. occipitalis was Fe > Zn > Mn > Cu >Cr > Pb > Cd > V > Ni. There was no significant difference (P > 0.05) between means of heavy metal levels in the species across the three stations. The estimated daily intake (EDI) of metals in the fishes and aquatic tiger frog were within the reference oral doses. The results showed that there was no potential health risk (HRI < 1) and no adverse health effects (TTHQ < 1) associated with the consumption of fish and frog from the Benin River.

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