Method of decontamination of contaminated pond clarifier

 

(57) Abstract:

The invention relates to a method for decontamination of radioactive liquids accumulated in reservoirs-pits, and having the possibility of contamination of surrounding areas as a result of tornadoes, heavy winds, and similar phenomena, with mineral substances. The method includes the purification of water by using a sorbent. The bottom of the reservoir is covered with clay, then gradually fill the reservoir sorbent - glauconitic sand, while the excess water away through beach wells, partially filled with glauconitic sand. The proposed method allows for a simple, reliable, cost-effective to neutralize contaminated reservoirs-pits, using natural materials - clay and glauconitic sand and existing monitoring wells. 1 C.p. f-crystals.

The invention relates to a method for decontamination of radioactive liquids accumulated in reservoirs-pits, and having the ability to infect the surrounding areas as a result of tornadoes, heavy winds, and similar phenomena, with mineral substances.

There is a method of decontamination of radioactive liquids, contamination which is not previse is s, at least 50% of the salt of barium and ferrocyanide of copper, and the process is conducted in a sulfate environment with a pH of less than 8 (p. USSR 468446, G 21 F 9/04, "Method of decontamination of radioactive liquids", publ. 25.04.75).

The drawback of this method is that the salts of barium, copper ferrocyanide require special training and pass through them contaminated water, which is impossible in the case of large volumes, for example in conditions of lake Karachay.

There is also known a method sorption of cesium from natural and industrial waters, selected as a prototype, using a porous composite material comprising vermiculite and propresidential with a degree of azetilirovanie 50-70% when the ratio of inorganic sorbent vermiculite and proprienitrile 15-85: 85-15 (p. RF 2065629, G 21 F 9/12, "Method for sorption of cesium from natural and industrial waters", publ. 20.08.96).

The disadvantage of this method is the need for special fabrication of the filter material, and therefore more expensive method of water treatment, especially if we are talking about large volumes of water.

The problem faced by the inventors is the creation of reliable, affordable, neurohormonal entrainment of water when the tornadoes, heavy wind and other natural phenomena and, therefore, exclude the possibility of radioactive contamination of the surrounding areas.

A method for disposal of contaminated pond clarifier, including the purification of water by using a sorbent, in which new is that the bottom of the reservoir is covered with clay, then gradually fill the reservoir glauconitic sand and excess water away through beach wells, partially filled with glauconitic sand.

The new method is that as onshore wells used for monitoring wells.

Neutralization of the reservoir tank, contaminated with radionuclides, such as lake Karachay involves lowering the water level, to prevent entrainment as a result of tornadoes, strong winds and the like, as well as simultaneous cleaning of the water that is provided by the use of the proposed method. A sufficient layer of clay laid on the bottom of the reservoir, does not allow water to go into the ground water serves as the castle, glauconitic sand, laid on a layer of clay is cheap natural sorbent radionuclides and, gradually filling the volume of the reservoir, acide knogo fill glauconitic sand, the water is directed to a system of sumps, where there was no longer dangerous for the environment water. On the shore of this pond clarifier there are monitoring wells, which can also be used for draining and cleaning of excess water from the reservoir tank.

When conducting a search of the patent and scientific and technical information was not found solutions containing a set of proposed features that allows us to conclude that the criteria of "novelty" and "inventive step".

The proposed method is as follows.

The bottom of the contaminated pond clarifier any known from the prior art method is covered with a layer of clay required for the formation of "clay castle". Then slowly fill the reservoir glauconitic sand (K, Na)(Fe, Al, Mg)2(SiAl)4ABOUT10(OH)2. When this happens, the sorption of radionuclides by glauconite, and partially purified water in the form of surplus flows into coastal wells, including monitoring, which also partially fill glauconitic sand. Tertiary treated borehole water is directed to a system of sumps.

Example.

The bottom of the lake Karachay, contaminated as a result of an accident at Mayak, Tony fill the lake tank glauconitic sand, while the excess water goes into coastal wells completed in 2 m glauconitic sand, and purified water in the sump. As onshore wells use and monitoring.

The proposed method allows for a simple, reliable, cost-effective to neutralize contaminated reservoirs-pits, using natural materials - clay and glauconitic sand and existing coastal monitoring wells.

1. Method of decontamination of contaminated pond clarifier, including the purification of water by using a sorbent, wherein the bottom of the reservoir is covered with clay, then gradually fill the reservoir sorbent - glauconitic sand and excess water away through beach wells, partially filled with glauconitic sand.

2. Method of decontamination of contaminated pond clarifier under item 1, characterized in that as onshore wells used for monitoring wells.

 

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