Features of heavy metals accumulation in water, bottom sediments and fish muscles in the Amur middle reaches

The article deals with the study of heavy metals distribution and accumulation in the Amur River system: water - suspended matter - bottom sediment - fish. The seasonal dynamics investigation has shown maximum concentrations of Zn, Cu and Pb in the water in April, and in the bottom sediment - in May and October. A distribution of Cd in the water is equal to that in the suspended matter, while most of Zn, Cu and Pb concentrate in the suspended matter. The Cu quantity in fish muscular tissue doesn't exceed the PDC for food substance, but the excess of Cd and Zn was detected at some species.