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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/12357

Title: Human health risks from metals and metalloid via consumption of food animals near gold mines in Tarkwa, Ghana: Estimation of the daily intakes and target hazard quotients (THQs)
Authors: Bortey-Sam, Nesta
Nakayama, Shouta M.M.
Ikenaka, Yoshinori
Akoto, Osei
Baidoo, Elvis
Yohannes, Yared Beyene
Mizukawa, Hazuki
Ishizuka, Mayumi
Keywords: Offal
Estimated daily intake
Target hazard quotient
Issue Date: Oct-2014
Publisher: Ecotoxicology and Environmental Safety
Citation: Ecotoxicology and Environmental Safety
Abstract: Heavy metal and metalloid contamination in food resulting from mining is of major concern due to the potential risk involved. Food consumption is the most likely route of human exposure to metals. This study was therefore to assess metals in different organs and different animal species near gold mines used for human consumption (free-range chicken, goat and sheep) in Tarkwa, Ghana, and to estimate the daily intake and health risk. The concentrations of Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Cd, and Pb were measured with an inductively coupled plasma-mass spectrometer and Hg analysis was done using the mercury analyzer. Principal component analysis of the results showed a clear separation between chicken, grouped on one side, and the ruminants clustered on another side in both offal and muscle. Interestingly, As, Cd, Hg, Mn and Pb made one cluster in the offal of chicken. Chicken muscle also showed similar distribution with As, Hg and Pb clustered together. The daily intake of metals (μg/kg body weight/ day) were in the following ranges; As [0.002 (kidneys of goat and sheep)–0.19 (chicken gizzard)], Cd [0.003 (chicken muscle)–0.55 (chicken liver)], Hg [0.002 (goat muscle)–0.29 (chicken liver)], Pb [0.01 (muscles and kidneys of goat and sheep)–0.96 (chicken gizzard)] and Mn [0.13 (goat kidney)–8.92 (sheep liver)]. From the results, daily intakes of As, Cd, Hg, Pb and Mn in these food animals were low compared to the provisional tolerable daily intake guidelines. The THQs although less than one, indicated that contributions of chicken gizzard and liver to toxic metal exposure in adults and especially children could be significant.
Description: This article is published in Ecotoxicology and Environmental Safety and also available at http://dx.doi.org/10.1016/j.ecoenv.2014.09.008
URI: 10.1016/j.ecoenv.2014.09.008 0147-6513
Appears in Collections:College of Science

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