Migration of elements

Ground water flow results in continuous change in its surrounding environment, in migration of elements in their composition and thereby 

The element migration distance and rate depend on their capability to pass into mobile natural solvents and migrate in them. In order to emphasize differences between elements in their migration mobility was introduced a concept of their migration ability. However, so far the substance of this term is ambiguous. 

Under such broader concept the migration ability of elements includes, first, their capability to pass from rock into mobile solvents and remain in them at the environment change, second, properties and mobility of the solvents-transporters. 

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The extraction by 1N NCI yields 5-10% of total heavy metal content. In case of Fe and Mn, these values are even higher. The maximum contents of mobile fractions of trace elements are monitored in the upper horizon. Thus, the role of evapotranspiration barrier in biogeochemical migration of elements in Dry Desert ecosystems pays a very important role in pollutants exposure. 

Goldberg, I.S. 1998. Vertical migration of elements from mineral deposits. Journal of Geochemical Exploration, 61, 191-202. 

Glagoleva, M.A., 1959. Forms of migration of elements in river waters. In K poznaniyu diageneza osadkov (On an Understanding of the Diagenesis of Sediments). Izd. Akad, Nauk S.S.S.R., Moscow, pp. 5-28 (in Russian). 

Kontorovich, A.E., 1968. Forms of migration of elements in the rivers of the humid zone. In Geokhimiya osadochnykh porod i rud (Geochemistry of Sedimentary Rocks and Ores). Izd. Nauka, Moscow, pp. 88-101 (in Russian). 

Eichholz GG, Petelka MF, Kury RL. 1988. Migration of elemental mercury through soil from simulated burial sites. Water Res 22(1) 15-20. 

Role of biogeochemical processes in aqueous migration of elements in Steppe ecosystems... 

Discuss the soil compartment of Tropical Rain Forest ecosystems. Note the common principles of biogeochemical migration of elements in these soils. 

The ecosystems of Madagascar Island are represented by wet tropical forests located on the eastern slope with very acid low fertility soils and by savannas in the western slopes with Cambisols. So the biogeochemical migration of elements in western ecosystems is restricted, whereas that in the eastern tropical forest is reinforced by very intensive type of biogeochemical cycling (Cb is 0.1-0.2). 

We will consider the natural biogeochemical provinces (see Chapter 6), new-formed biogeochemical provinces owed to anthropogenic influence and the migration of elements in food wehs for various multi-scale regions of the Worlds. 

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