Distribution of Heavy Metals in Lake Seliger Bottom Deposits     

Kosov  V. I.  Kosova  I. V.  Levinskii  V. V.  Ivanov  G. N.  Khil'chenko  A. I. 《Water Resources》2004,31(1):46-54

The distribution of some microelements in the surface and stratified layers of bottom sediments in Lake Seliger is studied. Data on the bottom deposit pollution by heavy metals is used to determine the anthropogenic load on the lake ecosystem. Cd, Zn, and Pb are shown to rapidly accumulate in thick (>1 m) bottom deposits that have formed during the period of lake existence. The concentrations of Cd and Zn are shown to correlate with the organic matter in thick bottom deposits.  相似文献   

Concentrations of Heavy Metals in the Upper Volga Bottom Deposits     

Kosov  V. I.  Ivanov  G. N.  Levinskii  V. V.  Ezhov  E. V. 《Water Resources》2001,28(4):407-412

The distribution of heavy metals in the Volga bottom deposits is studied. According to the degree of pollution with heavy metals, three stretches are singled out within the river reach under consideration. A drastic increase in Cu and Cd concentrations in bottom deposits is established. A close statistical correlation between Cu and Pb accumulation and the organic matter content of bottom deposits is revealed.  相似文献   

Interaction of Cr(III) with the humus acids of soil,water, and bottom sediments     

I. Ya. Koshcheeva  S. D. Khushvakhtova  V. V. Levinskii  V. N. Danilova  Yu. V. Kholin 《Geochemistry International》2007,45(2):178-184

The interaction of Cr(III) with humus acids [fulvic (FA) and humic (HA) acids] was studied in the systems Cr(III)-FA, Cr(III)-HA, and Cr(III)-FA-HA. Chromium(III) reacts with FA extracted from the headwaters of the Moscow River and from the Krapivenka River (a tributary of Lake Seliger) to form a highly soluble high-molecular-weight Cr(III)-hydroxofulvate complexes with \(\bar \beta _{11} \) = 1.93 × 10⁶ and 5.70 × 10⁶, respectively. Humic acids extracted from peat in the Tver area and the sapropel of Lake Seliger behave as complexing sorbents with conditional affinity constants logβ = 3.78 and 3.23 for Cr(III) sorption at HA sites in the peat and sapropel, respectively. In the three-component system Cr(III)-FA-HA, the Cr(III) distribution coefficient between solution and precipitate is controlled by the pH value and FA content in the solution and decreases by 1–1.5 orders of magnitude with increasing fulvic acid content.  相似文献