Differential Accumulation of HeavyMetals in Soft Tissues of Three Bivalvian Species from the SonghuaRiver near Harbin (China)
2020
Concentrations of heavy metals (HM) in water, bottom sediments
and soft tissues of native bivalves were determined to indicate
the level of anthropogenic pressure on the Songhua River near Harbin,
China. It was found that concentrations of six HM (Cd, Cr, Cu, Mn,
Pb, Zn) ranged from 0.001 to 0.007 (mg/L) in water and from 0.07
to 5617.13 (mg/kg) in bottom sediments. At the study site of the
river exposed to severe anthropogenic pollution, different bivalves
exhibited different rates of HM accumulation in their soft tissues.
The bioconcentration factors (BCF) were calculated for each metal
and proved to be significantly different in the tissues studied
(gills and hepatopancreas). The obtained data confirmed the existence
of inter-species differences in metal accumulation in tissues of
the native bivalves. This approach can be useful both in comparative physiological
studies of the Bivalvia and in choosing optimal indicator organisms
to assess anthropogenic pollution of natural waters of Northern
China and the Russian Far East.
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