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Free Content Food safety aspects of toxic element accumulation in fish from wastewater-fed ponds in Hanoi, Vietnam

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Summary Objective 

To evaluate the food safety of fish from production systems in Hanoi feed with domestic and industrial wastewater with respect to the potentially toxic elements such as arsenic (As), cadmium (Cd) and lead (Pb). Methods 

Common carp (Cyprinus carpio), silver carp (Hypophthalmichthys molitrix) and tilapia (Oreochromis niloticus) were sampled from wastewater-fed ponds, and total concentrations of As, Cd and Pb were determined in skin, liver and muscle. Results 

Arsenic, Cd and Pd concentrations were generally low and for many samples below the detection limit. The highest concentrations of Cd and Pb were found in the liver of tilapia, and the highest As concentration in the skin of tilapia. Maximum concentrations in muscle tissue were 0.120, 0.079 and 0.082 mg/kg fresh weight (f.w.) for As, Cd and Pb, respectively. Consumption of fish with maximum muscle tissue concentration will result in a human intake corresponding to 6.2%, 8.7% and 2.5% of the tolerable intake of these elements set by Codex Alimentarious Commission. Conclusion 

The consumption of common carp, silver carp and tilapia produced in wastewater-fed ponds of Hanoi seems not to constitute a food safety problem with respect to As, Cd and Pb.
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Keywords: Cyprinus carpio; Hanoi; Hypophthalmichthys molitrix; Oreochromis niloticus; arsenic; cadmium; lead; wastewater

Document Type: Research Article

Affiliations: 1:  Department of Natural Sciences, Faculty of Life Sciences, University of Copenhagen, Copenhagen, Denmark 2:  Environmental Health Department, National Institute of Occupational and Environmental Health, Ministry of Health, Hanoi, Vietnam 3:  Department of Veterinary Pathobiology, Faculty of Life Sciences, University of Copenhagen, Copenhagen, Denmark

Publication date: 2007-12-01

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