A kind of nuclide decontamination liquid and its preparation method and application

Abstract

The invention relates to the technical field of decontamination liquid, in particular to a nuclide decontamination liquid and its preparation method and application. The nuclide decontamination solution is composed of the following components in weight percentage: 0.3-6% of pentasodium diethylenetriaminepentaacetate, 0.1-5% of auxiliary chelating agent, 0.1-2% of buffering agent, and 0.1-2% of adsorbent , 1-10% surfactant, 0.1-1% preservative, 0.1-1% defoamer, 0.1-1% acid-base regulator, 0.1-2% stabilizer, water balance. The invention has the advantages of high decontamination efficiency, wide application range, strong environmental adaptability and long storage time.

Description

technical field [0001] The invention relates to the technical field of decontamination liquid, in particular to a nuclide decontamination liquid and its preparation method and application. Background technique [0002] Radioactive pollution refers to the occurrence of radioactive substances or rays that exceed national standards on the surface or inside of materials, human bodies, and environmental media in places due to human activities. With the rapid development of science and technology and economy, nuclear energy is widely used in energy, military, medical, testing and other fields. When people are engaged in various nuclear-related practical activities, wounds such as cuts, stab wounds, explosion injuries, and burns may occur. Various body surface wounds are in a radioactively polluted environment, and wounds may be contaminated by radioactive substances. After the radioactive material enters the human body through the wound, it will transfer to tissues such as blood,...

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Problems solved by technology

However, EDTA-Na 2 , carboxymethyl chitosan and sodium alginate have limited solubility in water, solids will precipitate at low temperatures, and the environmental adaptability is poor

Moreover, when sodium alginate and carboxymethyl chitosan are used together, it will affect their respective solubility, reduce the solubility of both at the same time, increase the viscosity of the solution, reduce the fluidity of the decontaminant, and make it difficult to wash the wound. large amount of radioactive residue

Moreover, the decontaminant contains a large amount of polysaccharides, and is in a neutral environment, so it is not easy to store for a long time, and it is easy to deteriorate

[0006] Chinese patent application CN110483694A discloses a novel hydrogel for radionuclide contamination and decontamination, its preparation method and application. The novel hydrogel comprises the following components in terms of mass percentage: 15.07%-48.65% acrylamide, 0.14 %-0.47% sodium alginate, 0.04%-0.12% diethyltriaminepentaacetic acid calcium sodium salt, 0.03%-0.11% ammonium persulfate and 50%-85% water; The pure physical interaction between molecular segments and between macromolecules and small molecules cross-links into a three-dimensional network structure. The content of sodium alginate, diethyltriaminepentaacetic acid calcium sodium salt and ammonium persulfate is too small to form a chemical structure. The above chelation adsorption is purely physical filtration, so the decontamination effect is poor

Moreover, this patent application needs to make polymer components into hydrogels, and the preparation process of the products is complicated, mainly relying on the three-dimensional network structure and adhesion effect of acrylamide hydrogels to adsorb radionuclides, because the viscosity of hydrogels is relatively high. High, so it is impossible to enter the gaps with small spacing for the adsorption of radionuclides, and the adsorbed hydrogel cannot be eluted from the gaps smoothly, resulting in low overall decontamination efficiency, application range and environmental adaptability Need to be improved, and the storage time is short

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