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A comparative study of heavy metal exposure risk from the consumption of some common species of cultured and captured fishes of Bangladesh

Mohammad Ruzlan Habib, Md Mozammel Hoque, Jamil Kabir, Shirin Akhter, M. Safiur Rahman, Janie Moore, Yeasmin Nahar Jolly
Journal of food composition and analysis 2022 v.108 pp. 104455
carcinogenicity, comparative study, energy-dispersive X-ray analysis, fish, fish consumption, food composition, food intoxication, heavy metals, markets, risk, rivers, spectrometers, Bangladesh
Food toxicity and health risks due to heavy metals exposure through fish consumption have become a major concern for this present era. Since, both cultured and captured fishes are largely consumed in Bangladesh, a comparison of heavy metals between those fishes are must. Seven sample species were collected from a tributary of the Meghna River at Lakhai Kheyaghat, Habiganj, Bangladesh and fish market of Dhaka, Bangladesh. Energy Dispersive X-Ray Fluorescence (EDXRF) Spectrometer were used to measure the metal concentrations. The sequence of metal concentration in the flesh of fishes was Fe > Zn > Cu > Pb>Hg for both fish categories with mean concentrations (mg kg⁻¹) of 69.8 ± 7.5 > 56.42 ± 8.59 > 19.52 ± 2.63 > 0.44 ± 0.18 > 0.39 ± 0.04 respectively for cultured fishes (n = 21). Statistically, mean Cu, Zn, and Pb concentrations from captured fishes flesh samples were not significantly different from cultured fishes (p > 0.05) when analyzed with non-parametric Kruskal-Wallis test. Pb carcinogenicity from the cultured fishes was measured a value of 2.5E-05 for children exceeding the prescribed limit by 25 times which indicates a substantial risk for lifelong exposure. Summarizing the results, the Toxicity Scores (TS) has shown substantial rate of possibility for study area inhabitants to be exposed to heavy metals through heavy metal contaminated fish consumption, specially cultured fishes.