The influence of processes occurring during deposition of port’s sediments in the gulf of Gdansk on the way of bounding metals in the sediments
Journal Title: Biuletyn Instytutu Morskiego - Year 2016, Vol 31, Issue 1
Abstract
The aim of the work was to investigate the influence of processes occurring during deposition of port sediments in dump sites on the bonding of metals in the sediment. About toxicity of polluted sediments are deciding not only concentration of macro- and micro- elements but, also the chemical forms in which they exist. These forms have considerable influence on their assimilation of different trophic levels (including human). The results of the carried out investigations indicated that the concentration of the trace metals ware decreasing in sediments deposited on the dumping sites. Grain size analysis demonstrated a significant decrease of clay fraction in sediments from the dumping site by comparison with the depositing sediments. The sequential analysis proved that the percentage of the particular forms of the metals (especially Pb and Cd) was changing in the sediments deposited in the dumping site. The changes of salinity, mechanical mixing during excavation, oxygen concentration may result in freeing the labile forms into the water column, especially the exchangeable and carbonate forms, which are loosely connected with the sediment, and these conditions may be sufficient to release these forms.
Authors and Affiliations
Grażyna Dembska, Grażyna Pazikowska -Sapota, Katarzyna Galer –Tatarowicz, Łukasz Zegarowski, Barbara Aftanas
Keywords
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- EP ID EP78761
- DOI 10.5604/12307424.1196268
- Views 114
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