Heavy metals in cultured oysters (Saccostrea glomerata) and clams (Meretrix lyrata) from the northern coastal area of Vietnam

Mar Pollut Bull. 2022 Nov;184:114140. doi: 10.1016/j.marpolbul.2022.114140. Epub 2022 Sep 21.


Oysters and clams are abundant and popularly consumed seafood in Viet Nam. These bivalves were proved to be suitable bioindicators to assess the heavy metal accumulation in the aquatic environment. The study is to investigate heavy metals such as As, Cd, Hg and Pb in the cultured oysters Saccostrea glomerata and clams Meretrix lyrata collected in VanDon - Quang Ninh, and CatBa - Hai Phong. The results showed that the metal heavy concentrations in the oysters Saccostrea glomerata and clams Meretrix lyrata presented in the order of As > Cd > Pb > Hg. The most polluted concentration with As among four heavy metals studied in six sampling sites was 2.81 ± 1.07 and 1.6 ± 0.62 mg/kg wet weight for clams and oysters, respectively. Investigated heavy metals in cultured oysters and clams indicated potential risks for human health in future by assessment of the heavy metals.

Keywords: Bivalve; Clam; Heavy metals; Meretrix lyrata; Oyster; Saccostrea glomerata.

MeSH terms

  • Animals
  • Bivalvia*
  • Cadmium
  • Environmental Biomarkers
  • Environmental Monitoring
  • Humans
  • Lead
  • Mercury*
  • Metals, Heavy* / analysis
  • Ostreidae*
  • Vietnam
  • Water Pollutants, Chemical* / analysis


  • Cadmium
  • Environmental Biomarkers
  • Lead
  • Water Pollutants, Chemical
  • Metals, Heavy
  • Mercury