Abstract
Heavy metal concentrations and other physical and chemical properties were studied so as to assess the heavy metal accumulation process in the sediments of a hypereutrophic lake, Lake Teganuma, Japan. The accumulations were most evident near the inflow inlets of two main inflow rivers in Kaminuma (the west part of Lake Teganuma) with the significant Zn accumulation. Except for Fe, the vertical distributions of heavy metals showed the highest concentrations in the surface 10 cm and decreased gradually with the sediment depth. The high concentrations in the upper layer was caused by an increase in the non-residual fractions. The large influx of heavy metal to Lake Teganuma seems to be due to the domestic effluents via the two rivers in last decades.
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