| Summary: | The chemical composition of the upper layer of sediments (0-1 cm) in the Kolvitsa and Knyazhaya estuaries and in the open part of Kandalaksha Bay is considered. It is shown that the silts are richer in Fe, C org, and heavy metals as compared with the sands. The highest concentrations of these elements are characteristic of the sediments from the zones of mixing of river and sea waters. The P, Zn, Cd, and Cu contents show strong correlations with Fe, whereas the Pb and Cu concentrations correlate with Corg. Very high Pb concentrations in the upper part of Kandalaksha Bay indicate technogenous pollution of the sediments. The lignin composition in the bottom sediments of Kandalaksha Bay is determined by its composition in soil and air suspensions. Vanillin and syringic structures prevail in the lignin molecular composition of the bottom sediments. Their sources are coniferous vegetation, soils, and mosses. The relations between selected types of phenol compounds point to the pollution of the bottom sediments with technogenous lignin. Lead and copper correlate well with the technogenous lignin Peer Reviewed
|
|---|