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Cleaning agent for removing radionuclides and using method of cleaning agent

A radionuclide and cleaning agent technology, which is applied in the direction of radioactive purification, detergent composition, chemical instruments and methods, etc., can solve the problems that are difficult to be popularized and applied, and achieve the effect of good removal effect, wide source of raw materials, and convenient use

Inactive Publication Date: 2015-07-22
武汉网绿环境技术咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of the organism itself by many conditions, it is difficult to be popularized and applied.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Cleaning liquid composition: A component is 98% formic acid 10%, 25% ammonia water 30%, the balance is water; B component is 99% ferrous sulfate, the addition amount is 40% of the total mass of A component The amount of active agent added is 3% of the total mass of component A.

[0029] Mix a certain amount of radioactively contaminated soil (the specific activity of radioactivity is 50780cpm) with the cleaning solution at a ratio of 1:2.5, add 1M ammonium formate solution to adjust the pH to 6, and stir for 30 minutes at 50°C, and then filter Repeat the treatment once according to the above method, centrifuge, filter and dry the soil, use a NaI scintillation counter to measure the soil radioactivity as 17823cpm, according to the formula:

[0030] Removal rate = (specific activity before treatment - specific activity after treatment) / specific activity before treatment to calculate the removal rate is 64.9%.

Embodiment 2

[0032] Cleaning liquid composition: A component is 98% formic acid 20%, 25% ammonia water 40%, the balance is water; B component is 99% sodium carbonate, and the addition amount is 40% and 99% of the total mass of A component The added amount of sodium sulfate is 5% of the total mass of component A, 3% of 99% potassium sulfate, and 3% of surfactant.

[0033] Mix a certain amount of radioactively contaminated soil (the specific activity of radioactivity is 900cpm) with the cleaning solution at a ratio of 1:2.5, add 1M ammonium formate solution to adjust the pH to 6.5, stir at 100°C for 30 minutes, and centrifuge and filter Dry the soil, use the NaI scintillation counter to measure the soil radioactivity as 445cpm, according to the formula:

[0034] Removal rate = (specific activity before treatment - specific activity after treatment) / specific activity before treatment to calculate the removal rate is 50.5%.

Embodiment 3

[0036] Cleaning liquid composition: A component is 98% formic acid 60%, 25% ammonia water 30%, the balance is water; B component is 99% sodium sulfate, and the addition amount is 8% and 99% of the total mass of A component The addition of zinc sulfate is 50% of the total mass of component A, the addition of 99% calcium hydroxide is 8% of the total mass of component A, the addition of 99% potassium sulfate is 5% of the total mass of component A, the surface The amount of active agent added is 8% of the total mass of component A.

[0037] Mix a certain amount of radioactively contaminated soil (the specific activity of radioactivity is 885cpm) with the cleaning solution at a ratio of 1:2.5, add 1M ammonium formate solution to adjust the pH to 6, stir at 120°C for 30 minutes, and centrifuge and filter Dry the soil, use the NaI scintillation counter to measure the soil radioactivity as 328cpm, according to the formula:

[0038] Removal rate = (specific activity before treatment -...

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PUM

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Abstract

The invention discloses a cleaning agent for removing radionuclides and a using method of the cleaning agent. The cleaning agent is formed by mixing two components A and B, wherein the component A comprises substances in percentage by mass as follows: 5%-80% of 98% formic acid, 20%-70% of 25% ammonia water and the balance of water; the component B is any one or more of 99% ferrous sulfate, 99% sodium carbonate, 99% sodium sulfate, 99% zinc sulfate, 99% calcium hydroxide, 99% potassium sulfate and a surfactant. The cleaning agent is simple in composition, wide in raw material source, low in cost, convenient to use, good in removing effect on the radionuclides and capable of quickly treating a large quantity of radionuclide pollutants and reducing the treatment cost.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a cleaning agent for removing radionuclides. Background technique [0002] At present, the wide application of nuclear technology in many fields such as energy, scientific research, medical treatment, industry, agriculture, military affairs, transportation, medical care and health has brought about increasing nuclear pollution problems. These radioactive wastes pose great potential threats to the environment and public health. Disposing of these radioactive wastes has become a global problem. [0003] Traditional treatment methods, such as mechanical cleaning with surfactants, ion exchange resins, membrane separation and acid leaching, have the disadvantages of high infrastructure investment, high treatment costs, unsatisfactory treatment effects, and easy to cause secondary pollution. Many questions. Removing radionuclides from the environment is very difficult. For a large area ...

Claims

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Application Information

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IPC IPC(8): C11D10/02G21F9/30
Inventor 苏敏
Owner 武汉网绿环境技术咨询有限公司
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