Method of protecting land from heavy metal pollution

FIELD: environmental protection.

SUBSTANCE: method comprises land ploughing, sowing of perennial herbs, which are natural accumulators of heavy metals and naturally growing on given area or in given locality, and finally cutting and utilization of overground part of plants. Preferred perennial herb is Austrian absinth (Artemisia austriaca). In case of iron salt pollution, cutting is executed during the end of vegetation period and, in case of other heavy metal pollution, in the beginning of vegetation period.

EFFECT: enabled biological protection of land from heavy metal pollution.

2 ex

 

The invention relates to the field of environmental protection, in particular protection of soil from pollution with heavy metals.

There is a method of creating a protective coating on the as of the USSR №1541234 (publ. 07.02.90), comprising coating the surface of the protected object chopped crop residues in combination with chemical fibers.

The known method has a large volume and does not protect the soil from the ingress of heavy metals.

Closest to the present invention is a method of remediation of soils contaminated with oil, RF patent No. 2038363 (publ. 27.06.95), including tillage, fertilizer application and sowing of seeds of annual and perennial herbaceous plants.

This method is not inherent shortcomings of the previous one, however, clear the soil contaminated with oil.

The aim of the invention is the use of terrestrial vascular plants growing naturally in the forest-steppe and steppe zones, in particular wormwood (Artemisia austriaca), as biosecurity soil from pollution with heavy metals.

To achieve the mentioned technical result in the proposed method, including the plowing and the sowing of perennial herbaceous plants for planting use seeds of plants that are natural accumulators of heavy metals and naturally growing on Dan the territory or in the area, make mowing and disposal of ground parts of herbaceous plants during their growing season, and as plant use species Artemisia austriaca (wormwood Austrian), and harvest produce when soil contamination with salts of iron at the end of the vegetation period, when the contamination of other heavy metals in the beginning of the vegetation period.

Distinctive features of the proposed method is that for sowing use seeds of plants that are natural accumulators of heavy metals and naturally growing in the same area or in the area, make mowing and disposal of ground parts of herbaceous plants during their growing season, and as plant use species Artemisia austriaca (wormwood Austrian), and harvest produce when soil contamination with salts of iron at the end of the vegetation period, when the contamination of other heavy metals in the beginning of the vegetation period.

This allows the use of higher plants (Artemisia Austrian) as a natural accumulator of heavy metals, reducing the contents of Cu, Zn, Pb, Ni, Co, Cr, Mn, Fe in the soil areas of sanitary protection zones of industrial enterprises.

In the three studies were collected and analyzed more than 300 samples of herbaceous plants. It is found that the maximum amount of Fe in the studied p is saniah observed at the end of the vegetation period (August), and the content of Cu, Zn, Pb, Ni, Co, Cr and Mn is the maximum at the beginning of the vegetation period (may)and then gradually decreases.

The method is as follows. On-site contaminated with heavy metals or exposed to pollution due to industrial emissions, produce plowing and sowing species Artemisia austriaca. Then for areas susceptible to contamination with salts of iron, hold the cut surface part of herbaceous plants at the end of the vegetation period, i.e. in the month of August, and for all other of the above metals in the beginning of the vegetation period (may), because at this time, the content of these metals reaches a maximum. Then hold the disposal of cut grass or by disposal at great depth in the territory, is not susceptible to contamination by heavy metals, or exportation to the territory, where there is a scarcity of this metal in the soil.

Example 1. The sowing seeds of Artemisia conducted in the month of August once, because the plant is perennial. To reduce the content of iron in the soil harvest produce for the next year in July-August, because at this time a number of specified metal in the plant as possible. The beveled part of the plant are buried on the territory where the amount of Fe in the soil does not exceed the norm, or the soil is depleted them. If not is bademosi mowing and disposal repeat a few years.

Example 2. Unlike example 1 to reduce the content in the soil Cu, Mn, Pb, Ni, Co, Cr and Zn harvest produce in may - early June, because at this time the quantity of these metals in plants as possible.

The proposed method is most effective can be used to create a sanitary-protective zones of ferrous and non-ferrous metallurgy of the steppe zone of the Urals, to protect against contamination of soils near businesses and degradation of steppe landscapes.

Method of protection of soil from pollution with heavy metals, including plowing, seeding, perennial herbaceous plants that are natural accumulators of heavy metals and naturally growing in the same area or in the area, make mowing and disposal of ground parts of herbaceous plants during their growing season, characterized in that as perennial plants use a type of wormwood Austrian (Artemisia austriaca), harvest produce when soil contamination with salts of iron at the end of the vegetation period, and by contamination of other metals at the beginning of the growing season.



 

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SUBSTANCE: claimed method includes steeping of plant seeds, which is capable of contaminant extraction from soil in composition based on bioactive substances of Chlorella Vulgaris for 15-18 hours. Then seeds are partially dried and cropped in contaminated soils. In 7-10 days after springing all soil area is treated with bioactive composition remained after seed steeping in form of aqueous solution in water/bioactive substance ratio of 15:1.

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3 cl, 2 tbl

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2 tbl, 16 ex

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3 tbl, 2 ex

FIELD: biotechnology, industrial microbiology.

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3 tbl, 2 ex

FIELD: biotechnology, industrial microbiology.

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3 tbl, 2 ex

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1 dwg

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16 cl, 1 dwg, 3 tbl, 2 ex

FIELD: environmental pollution control.

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16 cl, 1 dwg, 3 tbl, 2 ex

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5 cl, 2 dwg, 1 tbl

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2 ex

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2 ex

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3 cl, 5 tbl, 3 ex

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13 cl, 7 dwg, 2 tbl, 3 ex

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2 cl, 2 ex

FIELD: environmental pollution control.

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16 cl, 1 dwg, 3 tbl, 2 ex

FIELD: environmental pollution control.

SUBSTANCE: invention relates to industrial process of detoxifying sea and lagoon sediments or grounds polluted by stable organic trace pollutants (e.g., dioxins and furans, polychlorobiphenyls, aromatic polycyclic hydrocarbons) and inorganic trace pollutants (e.g., Hg, Cr, Cu, Zn, Pb, As, Cd, etc.). Detoxification process comprises following stages: (i) thermal desorption of organic pollutants in trace amounts from mud or ground and removal of volatile metals from furnace operated at 300 to 700єC to form first gaseous stream containing removed organic pollutants and volatile metals and stream consisting of remaining solids; and (ii) extracting heavy metals from the stream of remaining solids with the aid of inorganic acids or chelating compounds, in one or more steps, to produce chemically dissolved above-indicated heavy metals and essentially detoxified mud or ground having characteristics allowing thus treated mud or ground to be returned to their original place.

EFFECT: achieved complete detoxification with minimum environmental harm.

16 cl, 1 dwg, 3 tbl, 2 ex

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