Перевод названия: RADIONUCLIDES AND HEAVY METALS IN BOTTOM SEDIMENTS OF THE YENISEI RIVER: SPATIAL DISTRIBUTION AND CHRONOLOGY OF THEIR ACCUMULATION
Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций
Конференция: Радиоактивность и радиоактивные элементы в среде обитания человека; Томск; Томск
Год издания: 2016
Аннотация: For decades, the Yenisei River has received artificial radionuclides and heavy metals from the Mining-and-Chemical Combine (MCC) ROSATOM and industrial facilities of the city of Krasnoyarsk. Bottom sediments (BS) of the River accumulate radionuclides and heavy metals from water. Sediment layers located downstream of the MCC discharПоказать полностьюge point contain a wide range of artificial radionuclides: Eu isotopes, 137Cs, 60Co, and transuranium elements. The vertical distribution of radionuclides in bottom sediments is rather complex, with a number of extrema. Different radioisotope methods have been used to calculate sedimentation rates in several regions of the Yenisei River and date the maxima of radionuclide concentrations. In addition to artificial radionuclides, heavy metal concentrations have also been determined in the layers of sediments of the Yenisei River. For the metals studied, no significant concentration increases or consistent effects of industrial facilities on the chemical composition of bottom sediments have been revealed. In some parts of the River, Cd and Ni concentrations were higher than their threshold values, above which these metals may adversely affect the biota. Downstream of Krasnoyarsk, U and Th concentrations were increased. Thus, in some parts of the Yenisei River, aquatic organisms may be subjected to the joint adverse effects of contaminants, under increased concentrations of both radionuclides and heavy metals in bottom sediments.
Журнал: Радиоактивность и радиоактивные элементы в среде обитания человека
Номера страниц: 198-200
Издатель: Общество с ограниченной ответственностью "СТТ"