Determination of metal popular fishes in Bach Dang estuary, Hai Phong city

Abstract

This article presents the research results on the content of the macronutrients Magnesium (Mg), iron (Fe), zinc (Zn), copper (Cu), Manganese (Mn), Arsenic (As), Cadmium (Cd), mercury (Hg) in 3 fish species: The white sardine (Escualosa thoracata), phoenix-tailed anchovy (Coilia mystus) and Sea Mullet (Mugil cephalus) based on samples collected in 2020 from the Bach Dang estuary in Hai Phong. The analysis results showed that the metal content in fish samples in the area ranged from 854.19 to 1718.01 mg/kg dry weight for Mg; Fe from 32.60 to 167.89 mg/kg dry weight; Zn from 26.33 to 108.47 mg/kg dry weight; Mn from 0.92 to 25.46 mg/kg dry weight; Cu from 1.63 to 9.33 mg/kg dry weight; As from 0.56 to 13.11 mg/kg dry weight; Hg from 0.00 to 0.40 mg/kg dry weight; Cd from
0.01 to 0.10 mg/kg dry weight. The concentrations of metal elements in the three fish species fall within the limits specified by QCVN 8-2:2011/BYT, as well as the limits set by the European Commission (EC) in 2006 and the guidelines established by the Food and Agriculture Organization of the United Nations/World Health Organization (FAO/WHO) (1989). The correlation analysed samples showed a significant correlation between Fe-Cu, Zn-Cu, Hg-Cd. Coilia mystus accumulate high concentrations of Mn, Mg, Hg, Cd; Escualosa thoracata accumulate high concentrations of Fe, Zn, Cu; Mugil cephalus accumulates low levels of metal As.