Title of article :
Chalcophile elements Hg, Cd, Pb, As in Lake Umbozero, Murmansk Region, Russia
Author/Authors :
Dauvalter، V A نويسنده Institute of North Industrial Ecology Problems, Kola Science Centre, Russian Academy of Sciences, 14a Fersman St., Apatity, Murmansk Region, 184209, Russia , , Kashulin، N A نويسنده Institute of North Industrial Ecology Problems, Kola Science Centre, Russian Academy of Sciences, 14a Fersman St., Apatity, Murmansk Region, 184209, Russia , , Lehto، J نويسنده Laboratory of Radiochemistry, Department of Chemistry, P.O. Box 55, FI-00014 University of Helsinki, Finland , , Jernstr?m، J نويسنده Radiation Research Department, Ris? National Laboratory for Sustainable Energy, Technical University of Denmark - DTU, P.O.Box 49, DK-4000 Roskilde, Denmark ,
Abstract :
Investigations of Lake Umbozero, the second largest and the deepest lake of the
Murmansk Region, were carried out to detect and define biogeochemical patterns of distribution of
the chalcophile elements (Hg, Cd, Pb, As) in water, sediments and organs and tissues of whitefishes.
Lake Umbozero is affected by emissions and effluents from mining and metallurgical enterprises of
the Murmansk Region, as well as air pollution of a global character. Surface and near-bottom maxima
were found in the distributions of Pb and Cd in the water column. These two maxima appear to be
associated with the cyclical growth of phytoplankton in surface water layers and with sedimentation
of lifeless organisms and suspended particles in near-bottom layers. Average concentrations of Pb
and Cd in the water column were more than the average value for water of lakes of the taiga zone.
Pollution of Lake Umbozero led to higher concentrations of heavy metals in upper layers of sediments
as compared to deeper layers. Among heavy metals, the highest factors of contamination were
found for Cd and Pb. Pollution of the lake by chalcophile elements has also resulted in their
accumulation in organs and tissues of whitefish. Values for concentration factors greater than unity
were found for Cd in kidney (5.8) and for Hg in kidney, liver and muscle (3.6, 3.3 and 2.2, respectively)
of whitefish.
