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Processing method of radioactive waste liquid containing uranium

A radioactive waste liquid and treatment method technology, which is applied in the field of low radioactive waste liquid treatment, can solve the problems of difficulty in removing radioactive elements, increasing the storage area and storage cost of radioactive waste, increasing manpower and operating costs, and achieving low cost and step-by-step Simple and effective in reducing environmental pollution

Inactive Publication Date: 2013-02-13
GUILIN UNIV OF ELECTRONIC TECH
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AI Technical Summary

Problems solved by technology

Due to the fine colloidal particles of ferric hydroxide, usually less than 10 μm in size, it is very difficult to completely remove radioactive elements by filtering ferric hydroxide sol
In order to make the content of radioactive elements in the waste liquid lower than the safe value, it is necessary to repeat the above method, which will not only increase manpower and operating costs, but also increase the storage area and storage cost of radioactive waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] Will U 3 o 8 Soluble in dilute nitric acid, and prepare a solution containing 10ppm of U element as a standard solution. The measured radioactivity of this standard solution is 6.962×10 2 mmBq / cc. Adjust the pH value of the radioactive waste liquid for daily inspection to 7.0, filter it, and use it as a test liquid, and the measured radiation dose is 5.262×10 2 mmBq / cc.

[0014] Take 100ml of the above standard solution, add 4g of ferric chloride, stir evenly, and use it as No. A solution. Take 100ml of the above test solution and add 4g of ferric chloride, stir evenly, and use it as No. C solution. Add sodium hydroxide solution to liquid A and liquid C respectively, adjust pH=5.0, then add 0.5 g of persimmon tannin, stir for 1 hour, and filter. The U element content in the filtrate was measured, the U content of the A No. liquid filtrate was 1.6%, and the U element content of the C No. liquid was 2.1%. It can be seen that the U element in the waste liquid has ...

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PUM

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Abstract

The invention discloses a processing method of radioactive waste liquid containing uranium. The processing method includes: an iron ion solution or a ferrous ion solution is added in the waste liquid containing radioactive substance uranium, pH value is controlled by an alkaline solution, ferric hydroxide or ferrous hydroxide colloid is generated to enable the radioactive element uranium and the colloid to form coprecipitation, astringent persimmon tannin is added to enable the colloid to form large-particle precipitation, and filtration is performed. The processing method of the radioactive waste liquid containing the uranium has strong purifying capacity for the waste liquid containing the radioactive substance uranium, and enables content of the radioactive element uranium in the waste liquid to be zero after processing.

Description

technical field [0001] The invention relates to the treatment of low-radioactive waste liquid, in particular to a treatment method for radioactive waste liquid containing uranium (U) element. Background technique [0002] The waste liquid containing radioactive elements is easy to pollute the environment. If it is not disposed of in time, it will cause harm to the environment and human beings. Uranium (U) is a natural radioactive element. Low-concentration U-containing wastewater includes mine water of U, scientific research of nuclear industry uranium mining and metallurgy, wastewater discharged from production, wastewater discharged from nuclear power plants, etc. [1-2] . The existing treatment method of waste liquid containing radioactive elements such as U mainly adopts the co-precipitation method of radioactive elements and ferric hydroxide [2] . The main steps include: adding ferric chloride solution to waste liquid containing radioactive elements, stirring evenly, ...

Claims

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Application Information

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IPC IPC(8): G21F9/20
Inventor 王仲民戴培邦周治德刘二伟李桂银周怀营
Owner GUILIN UNIV OF ELECTRONIC TECH
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