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Device and method for repairing caesium contaminated soil with cathode approximation method

A technology of polluted soil and cathode approach, which is applied in the restoration of polluted soil, etc., to achieve the effect of clean treatment process, no secondary pollution, and improved treatment effect

Active Publication Date: 2014-08-06
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there is no very mature technology in China for the treatment of cesium-contaminated soil

Method used

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  • Device and method for repairing caesium contaminated soil with cathode approximation method
  • Device and method for repairing caesium contaminated soil with cathode approximation method
  • Device and method for repairing caesium contaminated soil with cathode approximation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] according to figure 1 and figure 2The repair device is set, the material used for the cylinder of the soil sample chamber and the electrode chamber is plexiglass, and the thickness of the plexiglass is 1.5cm; two large hollow cylinders have the same center line, no top surface, and the bottom is coplanar and The same height; 8 primary anode chambers are inside the outer cylinder and tangent to the side of the outer cylinder, and the primary anode is installed at the center of the primary anode chamber; 4 secondary anode chambers are inside the inner cylinder and Tangent to the side of the inner cylinder, the secondary anode is at the center of the secondary anode chamber; 1 cathode chamber is installed at the center of the cylinder, the centerline of cathode chamber 1 is the same as the centerline of the cylinder, and the cathode is installed at At the center of the cathode chamber; all electrode chambers are the same height as the cylinder and have a coplanar base. ...

Embodiment 2

[0029] Utilize above-mentioned device, carry out the method for repairing cesium polluted soil by cathodic approximation method, comprise the following steps:

[0030] (1) According to figure 1 Install a circular device for repairing cesium-contaminated soil. The diameter of the bottom surface of the outer cylinder is 60cm, the diameter of the bottom surface of the inner cylinder is 30cm, and the height of the two cylinders is 20cm; 8 first-level anode chambers 2 (level 1) are evenly arranged on the inner surface of the outer cylinder. The center of the anode chamber is inserted into the primary anode 4), and 4 secondary cathode chambers 3 are evenly arranged on the inner surface of the inner cylinder (the center of the secondary anode chamber is inserted into the secondary cathode 5); the anode adopts a titanium electrode with a height of 20 cm and a diameter of 1 cm. The cathode adopts a stainless steel electrode with a height of 20cm and a diameter of 1cm; in order to allow...

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Abstract

The invention discloses a device and a method for repairing caesium contaminated soil with a cathode approximation method, belonging to the field of caesium contaminated environment repairing technology. The device comprises a soil sample chamber, an electrode chamber, an electrode, a power supply and a pipeline, wherein the soil sample chamber comprises two hollow cylinders which are concentric, have different radiuses and have the same height, the hollow cylinders are arranged inside and outside to form an inner chamber and an outer chamber, a plurality of first-level anode chambers are uniformly arranged on the inner side of the outer cylinder and are close to the chamber wall, a plurality of second-level anode chambers are uniformly arranged at the inner side of the inner cylinder and are close to the chamber wall, and a cathode chamber is arranged at the center of the cylinder. The treatment method comprises the steps of fixing the cathode, changing the anode along with electrokinetic remediation, and enabling contaminants to be approximated to the cathode continuously, so as to enrich the contaminants-caesium in the soil in a specific cathode zone, effectively transfer the contaminants-caesium to be out of the contaminated soil, and reduce the volume of the contaminated soil; and finally adsorbing adopting an adsorbing material and recycling.

Description

technical field [0001] The invention belongs to the technical field of cesium-contaminated environment restoration, and in particular relates to a device for repairing cesium-contaminated soil by a cathode approach method and a restoration method thereof. Background technique [0002] With the increasing military and civilian use of nuclear technology, radionuclides are widely used in industry, agriculture, energy, military, transportation, medical and health and other fields. The background value of radionuclides in soil, especially long-lived nuclides, has increasing trend. Cesium-137 is one of the important nuclides in radioactive dust and nuclear fuel waste. Its half-life is 30117 years, its migration speed is very slow, and it is basically concentrated in the surface soil. After this radioactive element pollutant enters the soil, it will endanger the stability of the ecosystem, affect the flora composition, population structure and survival of soil microorganisms, ente...

Claims

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Application Information

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IPC IPC(8): B09C1/00
Inventor 卢宏玮任丽霞何理张一梅
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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