Effect of organic suspended solids and their sedimentation on the surrounding sea area.

A study of sediment contamination was made in one of the 23 specific designated important ports in Japan, the inner part of which had been used as wood pool. The study focused on the relationship between contaminants and organic matter in terms of ignition loss and the impact of the wood pool on the port area. Organic matter exists in the form of suspended solids and deposits. Sediment samples were taken from the mouths of the rivers feeding into Shimizu Port, from the wood pool and from Shimizu Port. Samples within Shimizu Port showed that as the ignition loss decreased with distance from the wood pool, other properties including the concentrations of trace metals, ignition loss and sulfide content also decreased with the distance. In conclusion, Shimizu Port seems to function as a buffer area between the wood pool and Suruga Bay.

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