Londono

Londono - A theoretical approach in the correlation of...

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Introduction It is known from mercury to be human health and environmental harmful. Also is known that due to bioaccumulation fate and transport of mercury is matter of concern. Results in the food chain shown 0.18, 6.57, and 7.88 for mercury concentration factors (upper level food chain and soil concentration relationship) of each fragments of the soil–plant–the herbivorous insect–the carnivorous insect food chain [1]. In all the levels mercury is the most largely biomagnified. Mercury is also emanated from anthropogenic and natural sources, and goes through the atmosphere where is transformed to other oxidized chemical species (HgII) and then precipitated by wet or dry deposition. In the environment the movement and distribution of the mercury is in increasing consensus on many scales, but not all, of the detailed of the mercury in the environment (Brosset and Lord, 1991). Soil is one of the most important receptors of the atmospheric mercury, where its transformation is not well known. Therefore, soil and mercury interactions are important to be comprehensive in a well approach of site remediation, mercury fate and transport and ecological and human risk assessment. Is for that reason, the purpose of this paper is to explore a theoretical approach of the correlation of mercury concentration and soil moisture. Soil moisture is an important variable of the water cycle in soil; it determines the vegetation access to water and the nutrients within it. Water is the most important solvent in soil, where humic and fulvic acids, nutrients, and also pollutants are transported and diffused. So water is a ubiquitous substance in the homosphere that transport most of the elements in nature. In the other hand, mercury kinetics in soil is not well known as well as soil organic composition. For that reason, a necessary approach to understand soil moisture and mercury correlation, and this result with the hydrologic cycle could let us think in a further approach of how the vegetation could be affected or altered in time base on mercury concentrations Development of soil mass balance equations for mercury Currently model run by EPA is a good source to interpret the relationship between soil and mercury concentration. The IEM-2M watershed model calculates surface soil concentrations, including dissolved, sorbed, and gas phases, as illustrated in Figure 6 [7]. The model budget in soil accounts the contaminant that enters at soil via wet and dry deposition, and diffusion of vapor phase. The dissipation process in the soil is mainly carried out by volatilization, runoff in the soil surface, leaching in the soil horizon, and erosion of particulate phase from the soil surface. We have to realize that the dynamics in the flux of mercury is not a function of the ecosystem type. Results in flux
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This note was uploaded on 07/09/2011 for the course CWR 5104C taught by Professor Miralles during the Spring '11 term at FIU.

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