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2022, № 2 (50) |
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SOIL SCIENCE
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Savich V.I., Sorokin A.E., Sedykh V.A., Rashkovich V.N. |
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Kinetics of soil contamination with heavy metals |
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The paper shows that the rate of soil contamination with heavy metals depends on a combination of soil properties: humus content, cation absorption capacity, granulometric composition of soils. The rate of absorption of heavy metals in soils depended on the position of the soils in the catena. On ordinary chernozems for plateaus and slopes, the content of mobile forms of lead was estimated by the equation: Pb = 20.1 - 0.02 N cm, where H is the depth of the layer r = -0.72, for the accumulative relief of the beam Rb = 27.4 - 0.14 N cm, r = -0.86.
The rate of accumulation of heavy metals in soils differs for gross and mobile forms of compounds, for short-term and long-term forecasts. Thus, the change in the content of mobile forms of lead in chernozems was estimated by the equation: Y = 0.143t + 1.42; R2 = 0.6; for cadmium, Y = 0.003t + 0.0003; R2 = 0.9. For the short-term forecast, Rb = 0.143t + 1.42, R2 = 0.63; for the medium-term forecast, Rb = 0.417t + 1.7; R2 = 0.71.
It is proved that when making forecasts of soil pollution with heavy metals, it is necessary to take into account the combination of soil properties, the position of the relief, the forecast period - the growing season, a number of years.
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