Technogenic halogenesis of oil-contaminated soils of floodplain ecosystems under conditions of humid soil formation and its environmental consequences
M.V. Nosova, V.P. Seredina
Section: Monitoring of natural and anthropogenically disturbed areas
The content and patterns of spatial distribution of readily soluble salts of technogenic origin in the soils of oil-contaminated
floodplain ecosystems of Western Siberia within the middle taiga subzone (Tomsk region) are considered. Peculiarities of
technogenic salinization – halogenesis processes that arise as a result of the operation of oilfield technological facilities (field
pipelines), are not typical for humid soil formation conditions and consist in the appearance of specific compounds of toxic salts
and signs of soil salinization. It is revealed that salinization leads to deterioration of soil fertility and the creation of adverse
conditions for the growth and development of plants. In the studied soils, technogenic salts are represented by compounds
of the toxic salts NaCl, Na2
SO4
, MgCl2
. The maximum amount of salts is recorded in the upper horizons of soils. Soils have
medium salinization (at the epicenter), and weak salinization (impact zone, pollution boundary) with a sulfate type of salinity
according to cationic composition, sodium type – according to anionic. The detected changes make it possible to assess the
ecological state of oil-contaminated soils in areas prone to excessive moisture (Western Siberia) as unsatisfactory, and to develop
a set of scientific recommendations for the implementation of the biological stage of remediation of floodplain soils. One of the
scientifically based methods may be the use of rolled biomats at the final stage of biological soil remediation. This material is
able to retain seeds of oil-resistant herbs, which are usually washed out by the rain from the soil, by creating a plant layer that
is mature in density and area, and also isolates plants from the negative effects of toxic salts formed as a result of pollution.
ISSN 1995-4301
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