The electrokinetic method of cleaning soil from radioactive and toxic substances and device for its implementation

 

(57) Abstract:

The invention relates to the purification of natural and man-made materials contaminated with radioactive and toxic substances. Technical result: improved productivity, efficiency, security, reliability, implementation, speed cleaning of soil, the level of separation of polluting the soil of substances, preventing the formation of secondary liquid waste and the expansion of the scope in terms of method, as well as the simplification of the structure, productivity, reliability and performance of the device. The essence of the invention: in areas of cleared ground create two cathode cavity and located between the anode cavity, placed in cavities in the electrolyte and bring to them the positive and negative potentials of the DC voltage. Then remove the electrolyte and the gas phase of the anode cavity and serves them in the cathode cavity. Then remove the electrolyte and the gas phase of the cathode cavity and enter the electrolyte in the anode cavity. Implement the mixture withdrawn from the cathode cavities electrolyte and gas phase separation of the mixture of the gas phase from a mixture of electrolytes and remove the separated mixture of the gas phase. thou electrolyte is carried out in a continuous mode to achieve the necessary degree of purification of the soil. The device includes two cathode node and located between the anode node, dividing the capacity of the vacuum pump, transporting the pump, site cleanup, corrective capacity, peristaltic dosing pump and a constant current source. 2 C. p. F.-ly, 4 Il.

The proposed method and device relate to the field of environmental protection, in particular to the purification of natural and man-made materials and the most effective can be used when cleaning clay soils containing radioactive and toxic substances.

The known method of cleaning soils contaminated with radioactive and toxic substances (1), comprising mixing the soil with water and abrasive material, mixing the resulting suspension, the Department cleared of soil and abrasive material from the aqueous phase and the release of radioactive and toxic substances from the aqueous phase.

The disadvantages of this method are:

- it increased the duration of the implementation, due to its multi-stage and periodicity;

its limited scope, due to the fact that the known method is not applicable in cases when it is necessary to preserve the integrity of the structure is S="ptx2">

A device for cleaning soils contaminated with radioactive and toxic substances (1), which is rotating around the horizontal axis of the hollow drum with a ratio of length to diameter of 0.8 - 1.2.

The disadvantages of the known devices are:

its lower performance, due to the periodicity of its work;

the low reliability due to the presence in the structure of its design mobile nodes, which can be damaged due to exposure to mechanical loads.

The known method electrokinetic cleaning of soils from polluting its substances (2), based on the phenomenon of electroosmosis and including the creation located at a distance from each other areas of cleared ground, the anode and cathode compartments, the initial filling of the anode and cathode cavities electrolytes, creating a pressure difference between anode and cathode cavities, leading to electrolyte anode and cathode cavities of positive and negative voltage potentials of the constant current, constant during the whole process of removing electrolyte from the anode and cathode compartments, the selection of the output electroelasticity known method is its limited scope, due to the possibility of its use only for the purification of unsaturated soils with good permeability.

A device for electrokinetic cleaning of soils from polluting its substances (2) containing anode node, consisting of equipped with inlet and outlet nozzles of the cylindrical body, the upper part of which is made of polyvinyl chloride (PVC) and has a hole, and the bottom of a porous ceramic material. Within the cylindrical body of the anode node is the electrolyte with the immersed anode, his discharge port sequentially connected to the pump, the purification unit and the inlet manifold, and its opening the upper part of the cylindrical body of the anode node is connected to vacuumised node; a cathode Assembly comprising fitted with inlet and outlet nozzles of the cylindrical body, the upper part of which is made of PVC and has a hole, and the bottom of a porous ceramic material. Within the cylindrical body is immersed in the electrolyte with him cathode, its exhaust pipe is connected in series with the pump, the purification unit and the inlet pipe, and his opening the upper part of the cylinder is United with the positive terminal to the anode, negative to the cathode.

The disadvantages of the known devices are:

his reduced performance due to:

a) the frequency of his work, due to the need periodic replacing it in the cathode, with limited time resource;

b) a reduction in the work process number extracted from the cleaned soil polluting its substances, because of the increasing value of the total resistance between the cathode and anode nodes due to the fact that on the surface of the cathode is the deposition of sparingly soluble compounds with low electrical conductivity;

its reduced efficiency due to a lower average coefficient of cleaning soil from contaminating its substances, due to the cylindrical shape of the working surface of the anode and cathode nodes that do not provide uniform distribution density of the electromagnetic field between them.

The closest to the technical nature of the claimed method is a method electrokinetic cleaning of soil from contaminating its substances (3), based on the principle of electrolysis and includes:

- establishment located on the distance and;

- adding electrolytes to the working concentrations desorbers ions and acidity in the anode and cathode cavities and wrap them positive and negative potentials of the DC voltage;

removal of electrolyte from the cathode cavities;

- the selection of the electrolyte withdrawn from the cathode cavities of pollutants to the ground;

- adjustment of the acidity of electrolyte withdrawn from the cathode cavities to pH = 3 and the flow of electrolytes with adjusted acidity in the cathode cavity;

The disadvantages of this method are:

his reduced performance due to a reduction in the process of implementing a number extracted from the cleaned soil polluting its substances, due to the increase in the total electrical resistance between the anode and cathode cavities due to the accumulation in the electrolyte cathode cavities of insoluble hydroxides of aluminum, iron, calcium, magnesium, etc. having low electrical conductivity;

its reduced efficiency, as well as the formation of secondary liquid waste associated with the need for periodic replacement of the spent electrolyte anode cavity on a new electrolyte;

- the need to preserve the integrity of the internal structure of the cleaned soil, which can chemically break down as a result of increasing acidity in the electrolyte of the anode cavity and contact with the cleaned substrate;

is it a high risk of implementation, due to the explosion and fire due to the fact that in the processing chain, the accumulation of produced gaseous hydrogen and oxygen;

- reducing the degree and speed cleanup of soil in the process of implementation of the method by reducing the concentration in the electrolyte of the anode cavity desorbers ions migrating from him in the treated soil and providing desorption from soil particles polluting its substance;

its low reliability, due to the fact that as a result of increasing gas pressure in the anode and cathode cavities (due to the formation of gaseous oxygen and hydrogen) can occur extrusion of these electrolytes in the treated soil;

the low degree of selection polluting the soil substances, because the above selection is made only from the electrolyte of the cathode cavities.

The closest to the technical nature of the claimed device is a device for electrokinetic cleaning of soil from contaminating its substances (3), which contains formirovanija PVC tubular housing, which is microporous tubular membrane (separator), which is located inside the electrolyte, the cathode, is made of stainless steel and located in the electrolyte inside the microporous tubular membrane, and a layer of fine-grained rocks or sand, located around a perforated PVC tubular casing;

- anode node, consisting of the supplied inlet pipe perforated PVC tubular housing in which is located the microporous tubular membrane, which is located inside the electrolyte, the anode, is made of conductive material and located flush with the outer surface of the perforated PVC tubular casing, a layer of carbon felt, situated around a perforated PVC tubular housing and the anode, and a layer of fine-grained rocks or sand, located around the layer of carbon felt;

- the intermediate tank, transporting the pump, site cleanup, corrective capacity and a constant current source, and the anode node is located between the cathode nodes, an outlet of each of the cathode nodes sequentially connected to bcom the same cathode node, the anode is connected to positive and the cathode to the negative pole of the DC source.

The disadvantages of the known devices are:

is it the increased complexity due to the increased structural complexity of the anode and cathode nodes;

his reduced performance caused by the use of the structure of the anode node of carbon felt, which does not allow (due to oxidation) to work with high current densities (>20 a/m2);

his work insecurity due to risk of chemical damage to the elements of the anode node due to the increase in the process of acid used in the electrolyte, due to the absence in the composition of the known device structural elements, provided his update;

its reduced efficiency due to decrease in the process of purification coefficient of soil from contaminating its substances due to:

(a) no part of the known device structural elements, through which you could update the electrolyte in the anode node;

b) cylindrical working surfaces of the anode and cathode nodes that do not provide as well as the methods and devices can be simultaneously used for cleanup of soil, contaminated with toxic substances, and for treatment of soils contaminated with radioactive substances, because the physico-chemical processes that are implemented in them, no matter whether polluting the soil substances radioactive or non-radioactive.

The advantages of the proposed method are increased productivity, efficiency, safety and reliability of implementation, as well as increasing the degree and speed cleanup of soil, the level of separation of polluting the soil of substances, preventing the formation of secondary liquid waste and the expansion of the scope.

The advantages of the inventive device are simplified design, improved performance, and increased reliability and efficiency of its work. These benefits in terms of method are provided due to the fact that the inventive method includes:

- establishment located at a distance from each other areas of cleared ground of the two cathode cavity and located between the anode cavity;

- adding electrolytes to the working concentrations desorbers ions and acidity in the anode and cathode cavities and wrap-electrolyte anode and cathode polonium electrolyte anode and cathode cavities positive and negative potentials of the DC voltage excretion of electrolyte and gas phase of the anode cavity and the flow in the cathode cavity, the excretion of electrolytes and gas phases of the cathode cavities together with submitted to them by the electrolyte and the gas phase in the anode cavity, and an introduction to the anode cavity of the electrolyte with the working concentrations desorbers ions and acidity;

the mixture withdrawn from the cathode cavities electrolyte, a mixture withdrawn from the cathode cavities of the gas phase, their separation from each other and removing the separated gas mixture of phases;

purification of the separated mixture of electrolytes from polluting the soil substances;

- adjustment of the concentration desorbers ions and acidity in the purified mixture of electrolytes to their business values its introduction instead of the electrolyte with the working concentrations desorbers ions and acidity in the anode cavity and the above-mentioned circulation of the mixture of electrolytes in continuous mode to achieve the necessary degree of purification of the ground;

and the pressure in the anode and cathode cavities are kept lower than atmospheric, as electrolytes, placed in the anode and cathode cavities, use the same electrolyte and adjusting the concentration desorbers ions and acidity to carry out their work units comprising from 0.01 to 5 mol/l and pH < 3.

Atlam anode and cathode cavities of positive and negative voltage potentials of the constant current from the anode cavity deduce the electrolyte and the gas phase and serves them in the cathode cavity, the electrolyte from the cathode cavities bring together gas phases cathode cavities, and filed in the cathode cavity electrolyte and gas phase in the anode cavity, and in the anode cavity is injected electrolyte with working concentrations desorbers ions and acidity;

- before cleaning shall mixture withdrawn from the cathode cavities of electrolytes and the mixture withdrawn from the cathode cavities of the gas phase, their separation from each other and removing the separated gas mixture of phases;

cleaning withdrawn from the cathode cavities electrolytes from polluting the soil radioactive and toxic substances and the subsequent adjustment of the acidification is carried out in a mixture with the electrolyte supplied to the cathode cavity of the anode cavity to the working parameters of acidity that make up pH < 3;

simultaneously with the adjustment of the acidity of treated electrolytes are adjusted concentrations contained in them desorbers ions to working velikin components from 0.01 to 5.0 mol/l;

instead of the electrolyte with the working concentrations desorbers ions in the anode cavity is injected purified mixture of electrolytes corrected with acidity and concentration desorbers ions;

degree of cleaning of the substrate;

- pressure in the anode and cathode cavities are kept lower than atmospheric, and as an electrolyte placed in the anode and cathode cavities, use the same electrolyte.

These advantages of the device are provided due to the fact that the inventive device includes:

two cathode node, each of which consists of provided with inlet and outlet ends of the housing made of dielectric material with internal electrolyte and cathode plate, and a microporous membrane, the role of the flat side wall of the casing, and the microporous membrane and the cathode plate are parallel to each other, the lower part of the inlet pipe is located in the lower part of the body and is made in the form of a distribution manifold, and the lower portion of the exhaust pipe is located at the level of the surface of the electrolyte;

- anode node, consisting of equipped with inlet and outlet ends of the housing made of dielectric material, with internal electrolyte and the anode plate, and two microporous membranes, role located against each other flat side walls, and both the s in the lower part of the body and is made in the form of a distribution manifold, and the lower portion of the exhaust pipe is located at the level of the surface of the electrolyte;

separating capacity, equipped with a vacuum pump, transporting the pump, site cleanup, corrective capacity, peristaltic dosing pump and a constant current source;

and the outlet of the anode node is connected with the inlet pipe cathodic sites, exhaust pipes which are connected with the separation capacity of the transporting pump, site cleanup, corrective capacity, peristaltic dosing pump and the inlet manifold anode node, anode node is located between the cathode nodes, flat microporous membrane cathode nodes are located opposite the flat microporous membrane anode node and parallel to them, the anode is connected to positive and the cathode to the negative pole of the DC source.

Distinctive features of the proposed device is that:

it further comprises a peristaltic dosing pump and separation capacity, equipped with a vacuum pump;

the cathode and anode cathodic and anodic sites made plate;

- microporous membrane of each of the plate and cathode of each of the cathode nodes parallel to each other;

- anode node contains one microporous membrane, each of which performs the role of situated against each other flat side walls of the hull anode node, both the microporous membrane and the anode plate are parallel to each other;

- anodic Assembly further comprises an outlet, the lower part of which is located at the level of the surface of the electrolyte;

- the lower part of the outlet pipes, cathodic sites are located on level surfaces in these electrolytes;

- the lower part of the inlet connections of the cathode node and the anode of the node located at the bottom of their cases and made in the form of distribution headers;

- microporous membrane cathode nodes are located opposite the microporous membrane anode node and parallel to them;

- anode node to its exhaust pipe connected to the inlet pipe of the cathode assemblies;

- cathodic sites of their exhaust pipes are connected with transporting the pump through the separation vessel equipped with a vacuum pump;

- corrective capacity through the metering peristaltic pump connected with the inlet connection of the anode of the node.

ate or toxic substances, create two cathode and located between the anode cavity, in which place electrolytes (by setting in these cavities anodic and cathodic sites filled with electrolytes in them), and then to the electrolyte of the anode cavity down positive and electrolyte cathode cavities negative potential of the DC voltage, and as electrolytes used acidic, with pH < 3, an aqueous solution containing a salt of a mineral acid (ions which play the role of ion - desorbent) with a concentration of 0.01 to 5.0 mol/L.

As a result of all the above operations in the treated soil between the anode electrolyte and the cathode cavities leads to the formation of the electric field under the influence of which in the electrolyte cathode cavities are cations of rock-forming elements (cations of aluminum, calcium, magnesium, iron, etc.,) due to electrochemical processes in the electrolyte of the anode cavity, there is an increase in its acidity and the formation of gaseous oxygen and electrolyte cathode cavities - alkalinity and the formation of gaseous hydrogen. At the same time, the feedback desorbers ions included in electric desorption of the latter with soil particles, and desorbed radionuclides and toxic substances under the action of the electric field is also provided in the electrolyte cathode cavities.

Simultaneously with the announcement of the electrolyte of the anode cavity positive and electrolyte cathode cavities of the negative potential of the DC voltage, using a vacuum pump (through the cathode cavity) discharge of the electrolyte and the gas phase of the anode cavity, the flow in the cathode cavity, the output of the electrolyte and the gas phase cathode cavities and filed them in the electrolyte and the gas phase of the anode cavity and the input of the electrolyte with the working concentrations desorbers ions and acidity in the anode cavity. In the result, the absolute values of the pressures in the anode and cathode cavities is below atmospheric and maintained at this level during the whole period of implementation of the proposed method, which prevents extrusion of the electrolyte from the anode and cathode cavities in the treated soil, and due to the interaction extracted from the anode cavity of the electrolyte and electrolyte cathode cavities is mutual neutralization of the excess of the formed hydrogen cations and anions hydrooxide, LASS="ptx2">

Derived from the cathode cavities of the electrolyte and the gas phase are mutual mixing and separation from each other, which is removed from the production process of the proposed method a mixture of a gas phase containing explosive or flammable concentrations of hydrogen and oxygen, and separated the mixture of the electrolyte is fed to the purification (e.g. sorption, choosedialog and so on ) from those present in radioactive and toxic elements.

After separation of a mixture of electrolytes radioactive and toxic elements it is directed to the simultaneous correction therein desorbers ions to their working concentration comprising from 0.01 to 5.0 mol/l, and adjusting the pH operating pH < 3. Then the purified mixture of electrolytes corrected with composition instead of the electrolyte with the working concentration desorbers ions and acidity is introduced into the anode cavity, after which the above-mentioned circulation of the mixture of the electrolyte is carried out in a continuous mode to achieve the necessary degree of purification of the soil (up to their maximum allowable concentrations).

In the case of non-compliance with this condition in the process of implementing the claimed sposobem electrolytes, that will not provide greater economy and will lead to the formation of secondary liquid waste.

By adjustment of the composition occurs quantitative recovery of maintenance desorbers ions and acidity, and if the working concentration desorbers ions is less than 0.01 mol/l, it would be impossible to increase the degree and speed cleanup of the soil, and if it is greater than 5.0 mol/l, the cleaning of soil from radioactive and toxic substances will be accompanied by simultaneous pollution deformiruemymi ions whose concentrations in the soil is limited to their maximum permissible concentrations, and the pH value equal to or more than 3, possibly the formation of insoluble iron hydroxide.

From the foregoing it follows that the inventive method compared with the method most similar analogue has higher productivity, efficiency, safety, reliability, degree and speed of treatment of the soil, and the degree of allocation of polluting the soil substances and wider scope, and in the process of implementation of the method does not generate secondary liquid waste.

Test PicasaWeb also has industrial applicability.

The inventive device is illustrated in the drawings, is shown in Fig. 1 to 4.

In Fig. 1 is a flow diagram of the inventive device.

In Fig. 2 presents an image of the first cathode node.

In Fig. 3 shows the image of the anode node.

In Fig. 4 presents a second image of the cathode node.

The inventive device consists of a first cathode node 1, the anode node 2, the second cathode node 3, the separation tank 4, the vacuum pump 5, the transporting pump 6, the purification unit 7, the adjustment capacity 8, peristaltic dosing pump 9 and the constant current source 10.

The first cathode Assembly 1 consists of a housing 11 containing a microporous membrane 12, the plate of the cathode 13, the electrolyte 14, an inlet pipe 15 and the exhaust pipe 16.

Anodic Assembly 2 consists of a housing 17 containing microporous membrane 18 and the microporous membrane 19, the plate electrode 20, the electrolyte 21, an inlet pipe 22 and outlet pipe 23.

The second cathode Assembly 3 consists of a housing 24 containing a microporous membrane 25, the plate of the cathode 26, the electrolyte 27, an inlet pipe 28 and wipmanage soil in two located at a distance from each other cavities placed first cathode Assembly 1 and the second cathode Assembly 3, between which is placed the anode node 2, so that the microporous membrane 12 of the housing 11 of the first cathode node 1 would be opposite the microporous membrane 19 of the housing 17 of the anode node 2 and would be parallel, and the microporous membrane 25 of the housing 24 of the second cathode node 3 would be contrary microporous membrane 18 of the housing 17 of the anode node 2 and would be parallel to it, and the adjustment capacity of 8 fill in the electrolyte with the working concentration desorbers ions and acidity.

After that, the cathode plate 13 of the first cathode node 1, the plate cathode 26 of the second cathode node 3 and the anode plate 20 of the anode node 2 from the constant current source 10 serves both negative and positive potentials of the DC voltage, and the plate shape of the cathode and anode, the flat shape of the microporous membranes of the cathodic and anodic sites, and also above their mutual arrangement ensures the uniformity of the density distribution of the electromagnetic field between them.

Under the influence of the potential difference of the electrolyte ions 21-desorbent through microporous membranes 18 and 19 are received in the contaminated soil and replacing with its particles ELEH the 27 of the first and second cathode nodes 1 and 3, and while elements-pollutants in the electrolyte 14 and 27 of the first and second cathode nodes 1 and 3 are also still rock-forming elements of the soil.

Simultaneously, under the influence of electric current in the electrolyte 14 and 27 of the first and second cathode nodes 1 and 3, as well as in the electrolyte anode 21 of the host 2 is electrochemical decomposition of water, and a plate cathodes 13 and 26 is recovering hydrogen ion to a neutral state, and the hydrogen is transferred into the gas phase . As a result of this process in the electrolyte 14 and 27 produces an excess of hydroxyl ions, which leads to lower its acidity.

On the plate anode anode 20 of node 2 is the oxidation of hydroxyl ions with the formation of gaseous oxygen and water, resulting in the electrolyte 21 is formed of an excess of hydrogen ions, which leads to an increase in its acidity.

At the same time negative and positive potentials, the DC voltage at the plate of the cathodes 13 and 26 of the first and second cathode nodes 1 and 3, and plate anode anode 20 node 2 comprises a vacuum pump 5 of the separation tank 4 and the metering peristaltic acapella and the second cathode nodes 1 and 3 and the anode node 2 is below atmospheric, and between the anode node 2 and the first and second cathode nodes 1 and 3 there is a pressure difference that provides a supply of electrolyte anode 21 of the host 2, together with the gas phase through the outlet 23 in the electrolyte 14 and 27 of the first and second cathode nodes 1 and 3 through the inlet pipe 15 and 28, and the possibility of simultaneous excretion of electrolytes together with the gas phase is ensured by the fact that the lower part of the outlet pipes, the cathodic and anodic sites are located on level surfaces in these electrolytes. In addition, simultaneously with the metering peristaltic pump 9 in the anode node 2 of the corrective capacity 8 serves the electrolyte with the working concentration desorbers ions and acidity.

In the above first and second cathode nodes 1 and 3 is mutual neutralization of excess hydrogen ions of the electrolyte 21 and excess hydroxyl ions of the electrolyte 14 and 27 (2H++ OH----> H2O), and the arrangement of the lower parts of the intake pipes in the lower parts of the buildings of the cathodic and anodic sites and run them in the form of distribution headers provides on the one hand, the uniformity of the ion-desorb vremenno with this electrolyte 14 and 27 of the cathode nodes 1 and 3, together with their gas phases, and received in the cathode nodes 1 and 3, the electrolyte 21 and the gas phase anode node 2 under the influence of the vacuum pump 5 are received in the separation tank 4, where is the confusion, separation and removal of the mixture of the gas phase of the inventive device.

As the filling of the separation tank 4 a mixture of electrolytes, saturated elements-pollutants and rock-forming elements include the connected transporting the pump 6, the feed mixture of electrolytes on the purification unit 7, in which the selection and concentration of elements-pollutants.

Purified mixture of electrolytes from the purification unit 7 enters the corrective capacity of 8, with a recovery of its acidity to pH < 3 and the concentration of ions-desorbent (decrease which occurred as a result of their interaction with soil particles) to their working concentration of 0.01 to 5.0 mol/L.

After adjusting the pH and ion concentration-desorbent, a mixture of electrolytes from the adjustment capacity 8 dosing peristaltic pump 9, which provides uniformity in its filing, serves instead of the electrolyte with the working concentration desorbers ions and acidity in the anode the necessary degree of purification of the soil.

The design of the dosing peristaltic pump 9, along with the uniformity of the supply of the electrolyte also provides and maintaining a discharge in the first and second cathode nodes 1 and 3 and the anode node 2, preventing the possibility of leaks in them the gas phase and the mixture of excess electrolyte from the adjustment tank 8.

Anodic and cathodic sites in the inventive device, the construction is simpler than the similar nodes in the device closest analogue.

The proposed device has a higher performance, reliability and efficiency because the anode and cathode nodes can operate with current densities of more than 20 a/m2in the composition of the claimed device has structural elements that provide the update of the electrolyte, and the flat shape of the anode, cathode and microporous membranes in combination with their mutual parallel arrangement ensures the uniformity of the density distribution of the electric field strength between them.

Tests have shown the efficiency of the inventive device in an industrial environment, which allows to conclude that the device also has industrial applicability.

LITERATURE

1. C>3. International application WO 95/11095, MCI B 09 C 1/00, A 62 D 3/00, op. 27.04.95

1. The electrokinetic method of cleaning soil from radioactive and toxic waste, including the creation located at a distance from each other areas of cleared ground of the two cathode cavity and located between the anode cavity, placing electrolytes with working concentrations desorbers ions and acidity in the anode and cathode cavities and wrap them positive and negative potentials of the DC voltage, the removal of electrolyte from the cathode cavities, cleaning withdrawn from the cathode cavities electrolytes from polluting the soil radioactive and toxic substances and the subsequent adjustment of the pH of treated electrolytes to their working concentrations, characterized in that simultaneously with the announcement of electrolyte anode and cathode cavities of positive and negative voltage potentials of the constant current from the anode cavity deduce the electrolyte and the gas phase and serves them in the cathode cavity, the electrolyte from the cathode cavities bring together gas phases cathode cavities, and filed in the cathode cavity electrolyte and gas phase in the anode cavity, and before cleaning shall mixture withdrawn from the cathode cavities of electrolytes and the mixture withdrawn from the cathode cavities of the gas phase, their separation from each other and removing the separated mixture of the gas phase, cleanup withdrawn from the cathode cavities electrolytes from polluting the soil radioactive and toxic substances and the subsequent adjustment of the acidification is carried out in a mixture with the electrolyte supplied to the cathode cavity of the anode cavity to the working parameters of acidity that make up pH < 3, and simultaneously with the adjustment of the acidity of treated electrolytes are adjusted concentrations contained in them desorbers ion to the business units that comprise 0.01 to 5.0 mol/l, instead of the electrolyte with the working concentrations desorbers ions and acidity in the anode cavity serves purified mixture of electrolytes corrected with acidity and concentration desorbers ions, after which the specified circulation of the mixture of the electrolyte is carried out in a continuous mode to achieve the necessary degree of purification of the ground, the pressure in the anode and cathode cavities are kept lower than atmospheric, and as an electrolyte placed in the anode and cathode cavities, use the same electrolyte.

2. Device for electrokinetic cleaning of soil from radioactive and toxic the kami housing, made of dielectric material, which is located inside the electrolyte and the cathode, located in the electrolyte, and the microporous membrane, the anode node, consisting of provided with the inlet pipe body made of a dielectric material, which is located inside the electrolyte and the anode, located in the electrolyte, and a microporous membrane, transporting the pump, site cleanup, corrective capacity and a constant current source, and the anode node is located between the cathode nodes transporting the pump sequentially connected to the purification unit and the adjustment capacity, the anode is connected to positive and the cathode to the negative pole of the DC source, characterized in that the device further comprises a peristaltic dosing pump and separation capacity, equipped with a vacuum pump, the cathodes and the anode cathodic and anodic sites made plate, the microporous membrane of each of the cathode node performs the role of the flat side wall of the casing of the cathode node, and a microporous membrane plate and cathode of each of the cathode nodes parallel to each other, the anode node contains another microporous member what about the node, both microporous membrane and the anode plate are parallel to each other, the anode node further comprises an outlet, the lower portion of which is located on the surface level of the electrolyte, the lower part of the outlet pipes, the cathode nodes are located at surface level in these electrolytes, the lower part of the inlet connections of the cathode node and the anode of the node located at the bottom of their cases and made in the form of distribution headers, microporous membrane cathode nodes are located opposite the microporous membrane anode node and parallel to them, the anode node to its exhaust pipe connected to the inlet pipe of the cathode nodes, cathodic sites of their exhaust pipes are connected with transporting the pump through the separation vessel equipped with a vacuum pump, and corrective capacity through the metering peristaltic pump connected with the inlet connection of the anode of the site.

 

Same patents:
The invention relates to nuclear engineering and can be used for decontamination of contaminated metal surfaces of the equipment for nuclear power plants
The invention relates to the field of nuclear energy and atomic industry and is aimed at improving the environmental performance and manufacturability handling of fissile materials and fission products
The invention relates to the protection of the environment and is intended for processing of solid radioactive waste by fixation in stable solid media

The invention relates to the field of decontamination of metal surfaces of objects with radioactive deposits, for example, elements of nuclear reactors
The invention relates to the processing of radioactive wastes by converting them into the vitreous state
The invention relates to the processing of radioactive wastes by converting them into the vitreous state

The invention relates to techniques for cleaning and surface decontamination of equipment contaminated with radioactive substances, and can be used in carrying out various works at radiochemical plants

The invention relates to a method of processing material with natural radioactivity (MORE)

The invention relates to environmental protection, public utilities, and in particular to methods of wastewater treatment of municipal solid waste (MSW) and can be used mainly in the warm period (spring-summer-autumn) when the air temperature is not below 0o
The invention relates to a method of chemical treatment of soils contaminated with oil and oil products, and can be used in case of emergency spill of oil and petroleum products, cleaning fuel depots, for the treatment of contaminated land and oily wastewater sludge

The invention relates to the environment, specifically to the treatment of soil contaminated with petroleum substances

The invention relates to the recovery location of the contaminated heterogeneous soil
The invention relates to the protection of the environment, in particular for the remediation of soils contaminated with oil and oil products

The invention relates to the recovery of soils contaminated with hydrocarbons

The invention relates to the field of protection and restoration of the environment, more precisely to the technologies for the restoration of polluted technogenic products environmental objects, and more specifically the invention relates to humic concentrate, method thereof, and device for the electrochemical preparation of humic concentrate, method of water purification from inorganic, organic and microbiological impurities, method of dewatering a plastic media, fashion detoxification of organic compounds, the method of disposal of sewage sludge, the method of creating a soil from natural and artificial soils and restoration of properties and fertility of degraded soils, composting organic waste, the disposal method of precipitation water
The invention relates to chemical technology, namely the decontamination of polluted soil unsymmetrical dimethylhydrazine

Soil conditioner // 2122903
The invention relates to environmental technologies and is intended for the remediation of contaminated soils and their use in severe chemical and physical pressure

FIELD: environment protection.

SUBSTANCE: method involves introducing into soil contaminated with oil or oil products ameliorant, such as complex of aluminosilicate mineral and nitrogen-phosphate fertilizer; plowing soil to depth of at least 25-30 cm.

EFFECT: reduced soil recultivation time and decreased consumption nitrogen-phosphate additives.

2 ex

Up!