Scientific publications

In results of investigations of chemical composition of lake sediments of the White Sea watershed within the Kola Peninsula the increase of concentrations of chalkophilous elements (Hg, Cd, Pb and As) in all investigated water reservoirs was established without dependence from whether they subject to air loading or accept sewage waters of the industrial enterprises. These elements last decades have got the status of global polluting elements. Thickness of the polluted sediment layer depends on sedimentation rate and ranges from 1 up to 15 cm. The increase of Pb content occurs from the end of XIX century to the beginning of industrial activity on the Kola Peninsula. The initial stage of Рb accumulation can be connected with transition of the polluted air masses from the industrial Europe. The appreciable increase of Cd concentration is dated 30-40 of XX century and the increased accumulation of this element occurs in the superficial layer. The increased concentrations of chalkophilous elements in sediments of the largest lake of Kola Peninsula Imandra are noticed in the top 10 cm layer. Excess of the contents in modern sediment layers сompared to background concentrations consists 7, 5, 7 and 4 times for Hg, Cd, Pb and As respectively.