Gel Processes in the Lake Ladoga Basinon the Medical
Environmental Situation in the Territoriesof the Catchment Basin of the Lake
V. A. Rumyantsev, Sh. R. Pozdnyakov, and L. N. Kryukov*
Institute of Limnology, Russian Academy of Sciences, St. Petersburg, Russia
e-mail: rum.ran@mail.ru; tbgmaster@mail.ru; lake@limno.org.ru
Received September 10, 2015
Abstract—This article contains the experimental results of studying the dynamics of sol–gel processes in
freshwater bodies of the Lake Ladoga basin. A set of specific profiles of the distribution of potentially hazardous
nanoparticles and nanosized metal associates in water ecosystems of the Ladoga basin was obtained for the first
time with account for standards on the content of metals in surface waters, the geochemical traits of the catch-
ment basin territories, and hydrodynamic and seasonal changes. The ecosystem of Lake Ladoga is characterized
by an expressed specificity of the inherent sol–gel processes; most likely, this is an important cause of morbidity
among the population of St. Petersburg, the Republic of Karelia, and Novgorod oblast.
Analysis of nanoscale measurements shows that the spectrum of water dispersion is unique for each tributary
of Lake Ladoga and, hence, can serve as an identification feature.
Keywords: Ladoga, lake, catchment basin, sol–gel, nanoparticle, metal, morbidity.
DOI: 10.1134/S1019331616010032
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