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P. A. Lozovik A. K. Morozov M. B. Zobkov T. A. Dukhovicheva L. A. Osipova 《Water Resources》2007,34(2):204-216
A relationship between indirect chemical indices of organic matter content of surface waters and light absorption in the visible and ultraviolet ranges is discussed. The allochthonous and autochthonous types of organic matter are found to essentially differ in the rate of light absorption. Techniques are proposed for the calculation of the concentrations of allochthonous and autochthonous organic matter by the integral rate of light consumption in the visible region and the bichromate oxidability of water, as well as by three indirect indices: chemical oxygen demand, permanganate oxidability, and water color index. The mean concentrations of allochthonous and autochthonous organic matter in large lakes (Ladoga, Onega, and Baikal) and in rivers and smaller water bodies in Karelia (>300 water objects) are analyzed. Allochthonous organic matter was found to predominate in most surface waters of Karelia (>80%), while allochthonous organic matter predominates only in lakes with a small specific catchment area (supposedly, <5) and in highly eutrophic lakes. 相似文献
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Lozovik P. A. Zobkova M. V. Ryzhakov A. V. Zobkov M. B. Efremova T. A. Sabylina A. V. Efremova T. V. 《Doklady Earth Sciences》2017,477(2):1510-1514
Using adsorption of organic matter (OM) on diethylaminoethyl cellulose (DEAE-cellulose) in the dynamic mode, OM is divided into autochthonous and allochthonous. Based on the experiments on BOD kinetics and OM division into components, the kinetic parameters of autochthonous and allochthonous OM transformation are established for the first time (kaut = 0.013, kall = 0.0013 day–1 at t =20°C). The activation parameters of transformation for autochthonous OM (ΔH# = 75.6 kJ/mol, ΔS# =–116.5 J/(mol K), and ΔG# = 108.3 J/mol) and allochthonous OM (ΔH# = 66.1 kJ/mol, ΔS# =–149.1 J/(mol K), and ΔG# = 108.0 J/mol) are calculated by the Arrhenius equation.
相似文献3.
M. B. Zobkov 《Water Resources》2012,39(1):90-97
A method was developed for the search of anomalies in water chemistry with the use of desirability functions. The method allows
one to assess, in automatic mode, the degree of deviation of water chemistry from regional averages derived from field observation
data in unpolluted water bodies in the region. The method was used to identify anomalous deviations of water ionic composition
and N forms from regional averages for some water bodies in the Republic of Karelia (the Kenti River system, water bodies
of Zaonezhskii Peninsula, Onega Lake), caused by both anthropogenic effect and specific natural conditions of water chemistry
formation. 相似文献
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The results of studies of water chemistry carried out in the water body in 1965–2009 are presented. This period features a considerable industrial and agricultural rise in the lake drainage basin, followed by a decline since the 1990s, manifesting themselves in the dynamics of some hydrochemical characteristics of water bodies. The multipurpose use of Onega Lake is shown to cause its pollution and eutrophication. The results of studies are used to evaluate the major components of the external load onto the lake and trends in variations of chemical characteristics under the effect of natural and anthropogenic factors. 相似文献
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Water Resources - External water exchange of bays of the lakes Onega (Kondopoga and Petrozavodsk bays) and Ladoga (Hiidenselkä Bay), considering the exchange with the lake water, was assessed... 相似文献
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