Institute of the Industrial Ecology Problems of the North of the Kola Science Center of the Russian Academy of Sciences

T. T. Gorbacheva, Senior Researcher, e-mail: gorbacheva@inep.ksc.ru

In the course of recultivation works an estimation of restoration possibility of ecological functions of soils, their abilities to self-cleaning are based on the pattern of water migration of wide range of elements on disturbed territory. Such research is inseparable from an estimation of geochemical barriers functioning efficiency. The subjects of this research were the plots of technogenic barren formed in spruce and pine sparse (7 and 10 km from a pollution source accordingly) and subjected to industrial complex “Severonikel” influence. The purpose of this work was to estimate an efficiency of technogenic geochemical barrier functioning in technogenic barren ground. For the characteristic of spatial and time variability of soil waters content the monthly data concerning to the concentration of separate elements in soil waters during 1999–2009 was used. Lyzimetry method of soil waters research, applied in this work, allows to carry out long-term monitoring investigations in the conditions of undisturbed structure of soil profile. According to mass flow calculation concerning to heavy metals (Cu, Ni, Co, Cr, Cd, Pb, Zn) recognized to 1 and 2 classes of danger in soil, their migration factors in technogenic barren were calculated. Parallel account of proton loading as such as organic matter and sulfates-ions migration estimates were made. It was concluded about retaining of barrier functions of technogenic barren ground. Due to high factors of pollutants migration after snow melting it was recommended to carry out recultivation works during the autumn as more reasonable. Results of this work can be used to estimate a suitability of technogenic geochemical barriers for the screen layer creation in the course of recultivation.

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