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A treatment method for radionuclide-containing pollutants

A technology for radionuclides and pollutants is applied in the field of treatment of pollutants containing radionuclides, which can solve the problems of difficulty in popularization and application, and achieve the effect of shortening treatment time, reducing treatment cost and good flocculation effect.

Active Publication Date: 2015-09-09
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

preparation example Construction

[0028] Preparation of artificial seawater: Add 10% sodium chloride and 1.3% magnesium chloride to tap water.

[0029] Preparation of simulated polluted water: Add one or more of cesium chloride, strontium chloride and potassium iodate to tap water, seawater or artificial seawater to make the concentrations 1mg / L, 8mg / L and 10mg / L respectively.

[0030] The standard solutions used in the experiment were 1.0mg / L cesium chloride artificial seawater solution, 1.0mg / L strontium chloride artificial seawater solution and 0.4mg / L potassium iodate artificial seawater solution.

Embodiment 1

[0032] Preparation of simulated polluted water: Add cesium chloride, strontium chloride and potassium iodate to seawater to make the concentrations 1mg / L, 8mg / L and 10mg / L respectively.

[0033] Add 2% sodium carbonate, 2% zeolite and 0.05% flocculant to the simulated polluted water according to the mass percentage and stir for 10 minutes, use ICP-MS to measure the strontium in the supernatant water

[0034] (Sr), iodine (I), cesium (Cs) concentration. Measurement results: Sr removal rate was 92.7%, I removal rate was 26.1%, and Cs removal rate was 89.8%. Then adjust the pH value of the upper layer of clear water to 4 to 5, add 0.1% hydrogen peroxide and 0.5% of 10% ferric chloride aqueous solution according to the mass percentage in the upper layer of clear water in the above treatment 1, stir for 10 minutes, and measure in the same way Concentrations of Sr, I, and Cs in the upper clear water. The measurement results: Sr removal rate was 93.3%, I removal rate was 68.8%, and...

Embodiment 2

[0036] Preparation of simulated polluted water: Add cesium chloride, strontium chloride and potassium iodate to seawater to make the concentrations 1mg / L, 8mg / L and 10mg / L respectively.

[0037] Add 0.5% sodium carbonate, 1.6% zeolite and 0.05% flocculant into the simulated polluted water according to the mass fraction and stir for 15 minutes. Then add 1% sodium carbonate, 1% zeolite, 0.2% calcium chloride and 0.05% flocculant in the supernatant water according to the mass fraction, and stir for 15 minutes. Then, add 0.5% 10% ferric chloride aqueous solution according to the mass fraction to the supernatant water, adjust the pH value to 4-5, add 0.5% zeolite and 0.05% flocculant, and stir for 5 minutes. Finally, ICP-MS was used to measure the concentrations of Sr, I, and Cs in the supernatant water. Measurement results: Sr removal rate was 90.9%, I removal rate was 97.2%, and Cs removal rate was 99.3%.

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Abstract

The invention provides a treatment method for radionuclide-containing pollutants. Firstly, if the pollutants are liquid or particles with the size less than 70 microns, the method comprises the steps of adding zeolite, a flocculant, and a coagulant aid in the liquid state pollutants, adjusting the PH value, stirring the mixture for 5-60 minutes, separating solids and liquid, obtaining supernate, and repeating the above-mentioned steps many times until obtained supernate meets requirements. Secondly, if the pollutants are particles with the size greater than 70 microns, the method comprises the steps of cleaning the pollutants with a cleaning fluid, separating solids and liquid and treating the obtained liquid substance with the method mentioned in the first part. Thirdly, if the pollutants are large-area solid pollutants, the method comprises the steps of applying livering cleaning liquid on the solid pollutants, standing the pollutants on the condition of exclusion of water, performing rinsing, collecting the cleaning agent on the solid pollutants and performing treating with the method mentioned in the first part. The method can effectively remove radionuclide in solids, particles, powder and waste water, is good in treatment effect, and can reduce the cost consumed in the radionuclide removing process, shorten the treatment time and reduce the treatment cost.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a treatment method for pollutants containing 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] At present, the treatment of sewage containing radionuclides is mostly carried out by ion exchange. This method can deal with a variety of ions, but the treatment time is long, and it is not suitable for the treatment of large amounts of sewage. For the treatment of sewage, especially radioactive nuclide The treatment of raw sewage has brought great inconvenience. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/10G21F9/06
CPCG21F9/06G21F9/10G21F9/28
Inventor 苏敏
Owner 武汉网绿环境技术咨询有限公司
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