Dynamics of the revenues of lead, zinc and copper from soil in the infiltration water of lysimeters
Currently, due to the active anthropogenic impact on landscape components, soil and adjacent media are contaminated. For heavy metal contaminated lands in the Nonchernozem zone of the Russian Federation, a comprehensive soil contamination (up to 5 MAC), there are phyto-technologies, excluding the use of chemical ameliorants. For the successful application of these technologies, it is necessary to clarify the nature of the behavior of heavy metals in the system «soil - drainage (groundwater) water». The article on the basis of a three year lysimetric experience shows the dynamics of revenues of lead, zinc and copper for the infiltration of water lysimeters on medium loamy gray forest and sod-podzolic sandy loam soils. In the spring lysimetry made sulphate of zinc, sulphate of copper, acetate of lead-acid batterie. Calculation of doses of zinc and copper 5 MAC, and lead 3.5 MAC produced on the basis of the atomic weight of the elements. Culture reagent was selected tetraploid varieties of perennial ryegrass VIC 66, which ensures high productivity on contaminated soils. The aim of the study was to determine the dynamics of migration of heavy metals entering the soil surface into infiltration (groundwater) waters. In the next three years, in the spring and collected samples of infiltration water lysimeters to understand the content of lead, zinc, and copper. According to the analysis, the dynamics of heavy metals inflow into infiltration waters under perennial grasses (raygrass) was made. It was found that the introduction of heavy metals into the soil causes an increase in their concentration in infiltration waters in the next two years. However, the concentration in the infiltration water lysimeters lead, zinc, copper significantly below the MAC values in the water of drinking and cultural-domestic water use. For the third year the concentration of lead, zinc and copper decreases and stabilizes at initial values.