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Health risk assessment of pesticide residue in freshly harvested Vigna subterranea (Bambara nut) in Nsukka South Eastern Nigeria

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Abstract

Two species of freshly harvested Bambara nut were analyzed for organophosphate and organochlorine pesticide residue using GC-FID and GC-ECD. The risk associated with the consumption of the Bambara nut was evaluated using the health risk index (HRI) and the probable cancer risk (PCR). A maximum of thirteen (13) organochlorines and eight (8) organophosphate pesticides were determined from both species respectively. The results revealed that almost all the quantified pesticides exceeded their respective FAO maximum residue levels (MRLs). The health risk index (HRI) values of the organochlorines and organophosphates were below 1 in adults indicating little or no risk to adults. While the HRI of the organophosphates and a few values in the organochlorines were above 1 in children indicating that organophosphate pesticides in the freshly harvested white and mixed Bambara nut could pose a great health risk to children within these areas. The Hierarchical Cluster Dendrogram indicated similar sources of the assessed organochlorine and organophosphate pesticides.

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Authors and Affiliations

  1. Department of Pure and Industrial Chemistry, University of Nigeria, Nsukka, Nigeria

    Vivian Chinekwu Onwujiogu, Hillary Onyeka Abugu & Chukwuma O. B. Okoye

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  1. Vivian Chinekwu Onwujiogu
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  2. Hillary Onyeka Abugu
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  3. Chukwuma O. B. Okoye
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Correspondence to Hillary Onyeka Abugu.

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Onwujiogu, V.C., Abugu, H.O. & Okoye, C.O.B. Health risk assessment of pesticide residue in freshly harvested Vigna subterranea (Bambara nut) in Nsukka South Eastern Nigeria. Environ Monit Assess 194, 536 (2022). https://doi.org/10.1007/s10661-022-10201-w

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