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The results of laboratory modeling of transformations of the ionic forms of Hg and Cu are discussed. The processes considered include the formation of organic and inorganic complexes, sorption on mineral suspension and bottom sediment. A peak in the concentration of organic complex of metals is found to exist. Published data are used to study the physicochemical mechanism of metal transformations in the water–bottom sediment system and to develop a mathematical model of these processes. An explanation is given to the metal concentration peak, which forms in water as a result of the competition between complex formation and sorption processes. Comparison of the experimental and model curves allowed the evaluation of the kinetic coefficients of the complex formation and sorption stages. 相似文献
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The sorption kinetics of heavy metal ions by organic suspension is considered in the case of a volley of wastewater into a channel flow. The characteristic time scales of the major kinetic stages of ionic sorption are estimated by using a model of matter sorption by particulate matter involving macrokinetic parameters and field data. The sorption on organic suspension and iron hydroxides is virtually instantaneous, whereas the characteristic time of sorption on clay particles is of the order of hours and days. A concept of sorption capacity of natural water is introduced. This capacity depends on the concentration of the sorbing suspension and the distribution coefficient of the dissolved forms of substances that can be sorbed, in particular, heavy metals. When the sorption capacity is small or sorption kinetics is slow, the dilution of wastewater becomes the main mechanism reducing the concentration of metal ionic forms. 相似文献
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Kocharyan A. G. Venitsianov E. V. Safronova N. S. Seren'kaya E. P. 《Water Resources》2003,30(4):404-412
Seasonal dynamics of total concentrations and the main forms of occurrence of heavy metals (HM) in the water mass and bottom deposits (BD) are studied in the Priplotinnyi (Near-dam) Pool of the Kuibyshev Reservoir. In the near-bottom and interstitial waters, heavy metals are mostly found in the form of complex compounds with organic and mineral ligands; the proportions of these complexes and the dominant form in the above media change from season to season. The hard skeleton of bottom deposits contains a large store of heavy metals that can be a source of the secondary pollution of water masses. 相似文献
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Water Resources - The notion of diffuse pollution process in water bodies of different dimensions is formulated. An algorithm is given for calculating the average annual volume of the export of... 相似文献
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Water Resources - The role of diffuse pollution of water bodies in the formation of water quality in them is characterized. Some features of diffuse pollution, which are of importance for managing... 相似文献
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Ways to improve methods of developing designs for solving environmental problems of river basins (river systems and drainage areas) subject to considerable anthropogenic load are considered. The Ural Economic Region and the Moskva River basin are used as examples. 相似文献
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Danilov-Danilyan V. I. Polyanin V. O. Fashchevskaya T. B. Kirpichnikova N. V. Kozlova M. A. Venitsianov E. V. 《Water Resources》2020,47(5):691-701
Water Resources - Regularities in the formation of diffuse pollution of water bodies are discussed as their understanding is required for the development of an adequate water-protection strategy.... 相似文献
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