Manganese di(acetate)

Bioaccumulation: aquatic / sediment

Additional information

Manganese in water can be significantly bioconcentrated by aquatic biota at lower trophic levels. Bioconcentration factors (BCFs) of :

 

·        2.000-20.000 for marine and freshwater plants,

·        2.500- 6.300 for phytoplankton,

·        300- 5.500 for marine microalgae,

·        800 - 830 for interdial mussels and

·        35 -  930 for fish

 

have been estimated. Uptake of manganese by aquatic invertebrates and fish significantly increases with temperature and decreases with pH, whereas dissolved oxygen has no significant effect. Uptake of manganese has been found to increase with the decreasing salinity. Concentrations in seaweed range from 130-750 mg/kg dry weight, whereas concentrations in shellfish range from 3-660 mg/kg/dry weight; higher concentrations in shellfish are associated with manganese- rich sediment. Concentrations of manganese found in tissue of marine and freshwater fish tend to range from 0.2 to 19 mg/kg dry weight. Higher manganese concentrations- above 100 mg/kg dry weight-have been reported for fish in polluted surface waters

 

Manganese concentrations in river sediments ranged from 410-6,700mg/kg dry weight; sediment from an urban lake receiving inputs from industrial and residential areas, as well as windborne dust from old mine dumps, contained manganese at concentrations ranging up to 13.000 mg/kg dry weight. Sediment manganese concentrations of 100-1.000 mg/kg dry weight have been reported for interidal mudflats; similar total manganese values were found in the Northern Adriatic sea. Surface sediments in the Baltic sea contained manganese at mean concentrations of 3.550-8.960 mg/kg dry weight; the highest manganese concentration were thought to be due to ferromanganese concretions and riverine loads.