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Mar Pollut Bull. 2019 Aug;145:436-447. doi: 10.1016/j.marpolbul.2019.06.035. Epub 2019 Jun 22.

Bioaccumulation and heavy metal concentration in tissues of some commercial fishes from the Meghna River Estuary in Bangladesh and human health implications.

Author information

1
Department of Fisheries and Marine Science, Noakhali Science and Technology University, Bangladesh. Electronic address: sayeedrrahman@gmail.com.
2
National Agricultural technology Program Phase-II Project (NATP-02), Department of Fisheries, Bangladesh.
3
Department of Chemistry, National University, Bangladesh.
4
Department of Fisheries and Marine Science, Noakhali Science and Technology University, Bangladesh.
5
Forensic Science Laboratory, Rapid Action Battalions Headquarters, Dhaka 1229, Bangladesh.

Abstract

Despite the beneficial aspect of aquatic food's consumption, bioaccumulation of toxic metals in fish can enhance the health risk for the consumers. Heavy metals were measured from editable tissues of some commercial fish species like Latis calcarifer, Silonia silondia, Clupisoma garua, Planiliza subviridis, Otolithoides pama, Tenulosa ilisa, Rhinomugil corsula, and Aila coila in the Meghna river estuary in Noakhali district. Heavy metals such as As, Pb, Cd, Cu, and Cr were detected by ICP-MS, which were significantly different (p ≤ 0.01), and the hierarchy of all mean concentrations were: Cu (5.14 mg/kg) > Pb (3.79 mg/kg) > As (1.08 mg/kg) > Cr (0.78 mg/kg) > Cd (0.12 mg/kg). The mean concentration of Cu (6.62 mg/kg) imparted to the maximum level in L. calcarifer, which slightly exceeded the Bangladesh food safety guideline. The mean BAFs of the contaminants were found as: Pb (1042.29) > Cr (1036.47) > As (934.84) > Cd (832.77) > Cu (772). Further, L. calcarifer, S. silondia, C. garua, and P. subviridis showed the bioaccumulative status. To assess the health risk effects, estimated daily intake (EDI), target hazard quotient (THQ) and carcinogenic risk (CR) were conducted. THQs for both adult and children consumers were <1, indicating that, consumers would not experience the non-carcinogenic health effects. Although children were more susceptible than adults, CR for all the consumers was found in the acceptable range (10-6 to 10-4).

KEYWORDS:

Bangladesh; Bioaccumulation; Fish; Health risk; Heavy metals; Meghana river estuary

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