FUW TRENDS IN SCIENCE & TECHNOLOGY JOURNAL
(A Peer Review Journal)
e–ISSN: 2408–5162; p–ISSN: 2048–5170
keywords: Heavy metals, vegetables, risk, Bayara–Bauchi.
Health risk index of chromium (Cr), cadmium (Cd)lead (Pb), copper (Cu), and zinc (Zn) have been determined on two vegetable samples (Hibiscus cannabinus and Sesamumradiatum), grown in Bayara–Bauchi. The levels of the heavy metals in the soil where the vegetables were grown were also determined. Atomic absorption spectrometer was used to estimate as well as evaluate the level of these heavy metals in the vegetables and soil. This study include the measurement of transfer factor (TF), daily dietary intake (DDI), daily intake of metal (DIM), health risk index (HIR) and target hazard quotient (THQ). The mean concentration of Cd, Cr, Pb, Cu, and Zn in Hibiscus cannabinuswere 3.05±0.01, 0.78±0.01, 0.12±0.01, 3.55±0.02 and 21.88±0.01 mg/kg, were 3.0±0.00,0.55±0.02, ND, 0.22±0.01 , and 24.17±0.00 mg/kg in Sesamumradiatum and in the soil were 2.62±0.02, 6.50±0.01, ND, 1.67±0.02 and 26.55±0.03 mg/kg, respectively. All the values obtained were below the permissible limit recommended by WHO/FAO except for Cd in both Hibiscus cannabinus and Sesamumradiatum. It is concluded that these vegetables are safe for public consumption as they do not contain the amount of the heavy metals that would constitute danger of metal poisoning. The HRI and THQ ≥1 indicated that there is potential health risk associated with Cd. Precautionary measures should be taken to avoid bioaccumulation and biotransformation of the heavy metals.
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