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A treatment method for radioactive waste resin

A technology of radioactive waste resin and treatment method, applied in radioactive purification, nuclear engineering and other directions, can solve the problems of high cost, high current intensity, high concentration of silver nitrate and nitric acid, poor treatment effect, etc., to achieve the safety of degradation products and facilitate the final disposal. , the effect of saving processing costs

Inactive Publication Date: 2018-06-15
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These studies have achieved good results in the treatment of liquid organic waste, but there are still many problems in the application of Ag-EMO to the treatment of radioactive waste resin, and the treatment effect is poor.
Xing Haifei et al [4] Regarding the research on Ag-EMO system degradation resin, the optimal current intensity used is 7A, AgNO 3 The concentration is 0.5mol / L, HNO 3 The concentration is 8mol / L, the current intensity, silver nitrate and nitric acid concentration used are all too high, the cost is high, there is a certain difficulty in operation, and the reusability of the system is not considered, which is not conducive to the degradation of radioactive waste resin by the Ag-EMO system engineering practice

Method used

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  • A treatment method for radioactive waste resin
  • A treatment method for radioactive waste resin
  • A treatment method for radioactive waste resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] like figure 1 As shown, the cathode and anode chambers of the electrolytic cell 1 are separated by Nafion membrane 7, a platinum electrode is inserted in the anode chamber as the anode electrode 3, and HNO is added 3 and Ag + 120mL of the mixed solution, in which HNO 3 Concentration is 8mol / L, Ag + The concentration is 0.2mol / L, put 2g of macroporous strongly acidic ion exchange resin into it, connect the anode to the positive pole of the power supply 9, place the anode chamber 2 on the magnetic stirrer 4 to ensure that the resin is evenly dispersed; in the cathode chamber 6 Put the gasket 8 down, add 120mL of 8mol / L HNO to the cathode chamber 3 The solution is continuously fed with air, inserted into the platinum electrode as the cathode 5, connected to the negative pole of the power supply, and continuously aerated, using a DC regulated power supply to provide a stable current, and the current density is controlled at 250mA / cm 2 , the temperature was 25°C, and the...

Embodiment 2

[0028] Separate the cathode and anode chambers of the electrolytic cell with Nafion membrane, insert a platinum electrode in the anode chamber as the anode electrode, and add HNO 3 and Ag +120mL of the mixed solution, in which HNO 3 Concentration is 8mol / L, Ag + The concentration is 0.2mol / L, put 2g of macroporous strongly acidic ion exchange resin into it, connect the anode to the positive pole of the power supply, place the anode chamber on a magnetic stirrer to ensure that the resin is evenly dispersed; put a pad under the cathode chamber sheet, add 120mL of 8mol / L HNO to the cathode chamber 3 The solution is continuously fed with air, a platinum electrode is inserted as a cathode, connected to the negative pole of the power supply, and continuously aerated, and a DC regulated power supply is used to provide a stable current, and the current density is controlled at 250mA / cm 2 , the temperature was 25°C, and the reaction time was 6 hours. The remaining resin in the anode...

Embodiment 3

[0030] Separate the cathode and anode chambers of the electrolytic cell with Nafion membrane, insert a platinum electrode in the anode chamber as the anode electrode, and add HNO 3 and Ag + 140mL of the mixed solution, in which HNO 3 Concentration is 7mol / L, Ag + The concentration is 0.2mol / L, put 1.5g of macroporous strongly acidic ion exchange resin into it, connect the anode to the positive pole of the power supply, place the anode chamber on a magnetic stirrer; add 140mL of 7mol / L ion exchange resin to the cathode chamber HNO 3 The solution is continuously fed with air, a platinum electrode is inserted as a cathode, connected to the negative electrode of the power supply, and continuously aerated, and a DC regulated power supply is used to provide a stable current, and the current density is controlled at 200mA / cm 2 , the temperature was 25°C, and after 2.5 hours of reaction, the remaining resin in the anode chamber was washed and dried, and the resin degradation rate w...

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Abstract

The invention provides a treatment method for radioactive waste resin. The method mainly comprises the steps of: separating an anode chamber and a cathode chamber of an electrolytic cell via a fluoride proton membrane and adding a mixed solution of HNO3 and a silver compound as anode liquid; adding an HNO3 solution into the cathode chamber as cathode liquid; placing radioactive waste resin in theanode chamber; connecting a platinum electrode or carbon electrode to the anode of a power supply as the anode; connecting an inert electrode made of the same material as that for the anode to the cathode of the power supply as the cathode; soaking the cathode and the anode into the cathode liquid and the anode liquid; turning on the DC stabilized power supply, performing treatment for 0.5-6h witha current density of 50-500 mA / cm<2> and a temperature of 20-65 DEG C, turning off the power supply, and filtering, separating, washing and drying resin in the anode chamber. 4-8 batches of radioactive waste rein can be treated without changing the anode and cathode liquid. The method can transform and decompose resin from solid particles to liquid phase low molecular weight organic matter and realize partial mineralization at a low Ag+ and HNO3 concentration and current density, thereby facilitating subsequent treatment.

Description

technical field [0001] The invention relates to a treatment method of organic waste, especially a treatment method of radioactive waste resin. Background technique [0002] As the energy crisis continues to intensify, new energy that replaces traditional energy is becoming more and more important. Among many technologies for developing new energy, nuclear technology is relatively mature. Nuclear energy has brought huge economic and social benefits to mankind. , There will often be a large amount of waste water containing radionuclides. Ion exchange technology has become one of the most important methods for treating radioactive wastewater due to its low cost and excellent adsorption performance. However, when the resin adsorption reaches saturation, it must be replaced, which makes the amount of radioactive resin gradually increase. After a series of changes such as radiation, pyrolysis, and biodegradation, waste resin will produce H 2 , NH 3 、CH 4 The presence of flamma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/30
CPCG21F9/30
Inventor 孙奇娜李佳玮陈龑斐徐计张庆瑞
Owner YANSHAN UNIV
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