Mercury accumulation in bivalve molluscs in hydroecosystem of Red River estuary (Vietnam)

The article presents analysis of mercury content in different tissues such as gills, mantle, hepatopancreas and body (leg) 4 species bivalve molluscs the estuary Red River Vietnam. studies were carried out 2016–2021 during main hydrological seasons (during summer flood winter low water) at 37 stations delta estuarine coast River. There are shown dependences mollusc on age parameters (length mass tissues) pollutant dissolved, suspended forms near-bottom water layers bottom sediments. varies whithin 0,023 ± 0,001 to 0,459 0,007 mg/kg wet weight. highest was found 
 Austriella corrugata, lowest - leg Lutraria rhynchaena. Significant close positive correlations registered between concentrations layer sediments (r from 0.68 0.92, p < 0.05). All studied classified macroconcentrators water; corrugata can actively accumulate not only water, but also Bivalve be used an object biomonitoring when studying distribution