AI Article Synopsis
- Manzala Lake was analyzed to evaluate heavy metal concentrations and their ecological risks in local fish species.
- The study found that the mercury, arsenic, lead, and cadmium levels in fish muscles exceeded recommended limits, with African catfish showing the highest concentrations.
- The research indicated significant health risks associated with consuming these fish due to high toxicity values, necessitating stricter hygiene practices to reduce contamination and ensure safety.
Article Abstract
Manzala Lake was sampled to assess the concentrations and possible ecological risks of heavy metals. The mean heavy metal levels in the muscles of Nile tilapia, Flathead grey mullets and African catfish were 0.01, 0.15 and 0.29 mg/kg, respectively, for mercury; 3.16, 4.25 and 4.74 mg/kg for arsenic; 1.01, 0.87 and 0.95 mg/kg for lead; and 0.05, 0.12 and 0.06 mg/kg for cadmium. The levels of heavy metals exceeded their maximum permissible limits in most samples. The EDIs of some metals were higher than their PTDIs or BMDLs. The THQs and TTHQs from metal intake were >1 for Hg and Cd. In addition, the TCR values of As in all fish species were higher than 1.0 × 10 indicating a potential health risks from consumption of fish species which need strict hygienic procedures to prevent fish contamination with heavy metals and ensure that their levels did not exceed the maximum permissible limits.
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| http://dx.doi.org/10.1016/j.marpolbul.2024.116391 | DOI Listing |
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