A cleaning agent for removing radioactive contaminants and its use

Abstract

The application discloses a cleaning agent for removing radioactive pollutants and belongs to the technical field of special decontaminants. The cleaning agent is composed of the following components and in the following mass percentages: 5-20% of a surfactant, 10-30% of a chelating agent, 0.3-2% of a natural product with a radiation prevention function, and 48-85% of deionized water. The cleaning agent for removing radioactive pollutants prepared by the application has the performance of removing radioactive metal ions, strong decontamination performance, good biological safety, and is suitable for the body surface and has the characteristics of mildness and no irritation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of special detergents, and particularly relates to a cleaning agent for removing radioactive contaminants. BACKGROUND

[0002] With the continuous development of nuclear power construction, the demand for decontamination of nuclear power industry in China is gradually increasing. In daily operations, workers in the nuclear industry are easily contaminated by radioactive nuclides on their clothes and body surfaces. After the body surface is contaminated by radioactive nuclides, the radioactive nuclides may even enter the blood through the skin. Before leaving the post, the workers need to use special bathing products for cleaning, and only after passing the inspection can they leave; as for the clothes worn by the workers, they also need to use professional detergent products for cleaning, and only after determining that there is no radioactive nuclide can they be worn again.

[0003] In the prior art, the methods that can effectively remove radioactive nuclides include: (1) decontamination gel method, using a spraying device to spray the gel on the surface of the equipment to be decontaminated, and after a certain action time, the gel coating is removed by washing to achieve decontamination; (2) oxidation decontamination foam technology, using foam to carry cleaning agents, and through spraying, bubbling or foaming, the radioactive contaminated equipment and components are decontaminated; (3) mechanical-physical method, using sandblasting and high-pressure water washing. However, these methods are not suitable for daily body surface and clothes cleaning of workers in the nuclear industry. At present, there is still no special cleaning agent for daily body surface and clothes cleaning of workers in the nuclear industry on the market in China.

[0004] Chinese patent CN110452779A discloses a textile surface adhesion contaminated nuclide cleaning agent and a preparation method thereof. The raw material composition of the cleaning agent comprises 12-18wt% of a composite surfactant, 15-20wt% of a complexing agent, 8-14wt% of an enzyme preparation, 5-8wt% of an enzyme stabilizer, a pH adjuster and the balance of water. The disadvantages of the patent technology are that the product has a high alkalinity, the pH value is as high as 9.0-9.6, and it is not suitable as a cleaning agent for cleaning the body surface of workers, and the enzyme preparation and enzyme stabilizer are easy to lose activity in an alkaline environment for a long time, resulting in a decrease in decontamination power. Therefore, the shelf life of this cleaning agent is relatively short.

[0005] Chinese patent CN115215829A discloses a preparation method of a green plant tannin type radionuclide decontamination surfactant, comprising: preparing a tannin solution, obtaining an amine group tannin by Mannich reaction, then grafting a hydrophobic long chain by acylation reaction to obtain a tannin-based surfactant solution; adjusting the pH of the solution to 1-2 with 6M HCl, removing the supernatant after standing, layering and centrifugation, washing with a solvent to remove water-soluble substances, and then removing byproducts oleic acid in the synthetic product by organic solvent extraction. The solid after extraction is freeze-dried to obtain the green plant tannin type radionuclide decontamination surfactant. The patent technology extracts tannin type surfactant from green plants, has the advantages of high safety, easy biodegradation, environmental friendliness, etc., but has the disadvantage of complex process flow and generation of a large amount of waste organic reagents, waste organic solvents, waste acid and byproduct oleic acid during the preparation process. SUMMARY

[0006] The purpose of the present application is to provide a cleaning agent for removing radioactive contaminants to solve the problem of lack of special decontamination surfactant for removing radionuclides on the current domestic market, and the problem of high alkalinity of the cleaning agent product obtained by the preparation method provided in the prior art, which is not suitable as a cleaning agent for cleaning the body surface of workers in the nuclear industry, or the problem of complex preparation process, production of a large amount of waste organic reagents, waste organic solvents, waste acid and byproduct oleic acid. Based on years of research in the field of cleaning agents, the inventors selected natural products with radiation protection effect, salt-tolerant surfactants and chelating agents with super strong chelating effect as main raw materials, used deionized water as solvent, and obtained a cleaning agent for removing radioactive contaminants through a simple preparation process.

[0007] The detailed technical solutions of the present application are as follows:

[0008] A cleaning agent for removing radioactive contaminants, characterized in that the composition and mass percentage content of each component of the cleaning agent are: 5-20% of a surfactant, 10-30% of a chelating agent, 0.3-2% of a natural product, and the balance is deionized water; the natural product is one or more of soy isoflavones, resveratrol, tea polyphenols, vitamin E, tremella polysaccharide, gallic acid, procyanidin, astaxanthin and lavender essential oil.

[0009] Preferably, the surfactant is one or more of modified oil ethoxylate sulfonate SNS-80, alcohol ether carboxylate AEC-9Na, sodium dodecyl diphenyl ether disulfonate 2A1, isomeric alkyl glycoside IC-06, and fatty alcohol polyalkoxy ether LX-1509. More preferably, the surfactant is a mixture of any two of modified oil ethoxylate sulfonate SNS-80, fatty alcohol polyalkoxy ether LX-1509, alcohol ether carboxylate AEC-9Na, and isomeric alkyl glycoside IC-06 in a mass ratio of 1-3:1. More preferably, the surfactant is a mixture of sodium dodecyl diphenyl ether disulfonate 2A1, fatty alcohol polyalkoxy ether LX-1509, and isomeric alkyl glycoside IC-06 in a mass ratio of 11:8:3.

[0010] Preferably, the chelating agent is one or more of tartaric acid, gluconic acid, glutamic acid diacetic acid tetrasodium GLDA, diethylene triamine pentaacetic acid sodium DTPA, and methyl glycine diacetic acid trisodium MGDA. More preferably, the chelating agent is a mixture of any two of tartaric acid, gluconic acid, glutamic acid diacetic acid tetrasodium GLDA, diethylene triamine pentaacetic acid sodium DTPA, and methyl glycine diacetic acid trisodium MGDA in a mass ratio of 3-9:2-11. More preferably, the chelating agent is a mixture of methyl glycine diacetic acid trisodium MGDA, diethylene triamine pentaacetic acid sodium DTPA, and glutamic acid diacetic acid tetrasodium GLDA in a mass ratio of 11:5:8.

[0011] Preferably, the natural product is a mixture of any two of soy isoflavones, proanthocyanidins, vitamin E, resveratrol E, gallic acid, tea polyphenols, and soy isoflavones E in a mass ratio of 4-10:8-12.

[0012] Preferably, the natural product is a mixture of vitamin E, soy isoflavones, tremella polysaccharide, and lavender essential oil in a mass ratio of 3:7:2:10.

[0013] The preparation method of the cleaning agent for removing radioactive contaminants according to the present application comprises the following steps:

[0014] (1) The production equipment is cleaned and disinfected, and each component is weighed according to the formula proportion of 5-20% of salt-tolerant surfactant, 10-30% of chelating agent, 0.3-2% of natural product with radiation protection effect, and the rest of deionized water.

[0015] (2) A certain concentration of salt-tolerant surfactant solution is prepared under room temperature conditions with an appropriate amount of deionized water.

[0016] (3) In the salt-tolerant surfactant solution obtained in step (2), a chelating agent and a natural product with radiation protection effect are sequentially added, the stirring rate is set to 300-800 rpm, and uniform stirring is performed to obtain a cleaning agent for removing radionuclides.

[0017] The cleaning agent for removing radioactive contaminants provided by the present application can be applied in the field of nuclear industry as a special detergent, a special cleaning agent, a special bathing product or a special bathing product additive.

[0018] Compared with the prior art, the technical effect of the cleaning agent for removing radioactive contaminants disclosed by the present application is that:

[0019] (1) The cleaning agent for removing radioactive contaminants provided by the present application is suitable for directly removing radiation ions adhered to the human body surface, and the content of the chelating agent in the formula is small, which does not irritate the human skin. At the same time, the selected natural product in the formula also has a moisturizing function, which can maintain and protect the normal barrier function of the skin, prevent the evaporation of skin moisture, keep the stratum corneum of the body surface at a reasonable water content, and improve the phenomena such as peeling, tightness and dry lines on the skin surface, so it can be used as a cleaning product for workers in the field of nuclear energy industry, such as a detergent, a cleaning agent, a special bathing product and a special bathing product additive.

[0020] (2) The cleaning agent for removing radioactive contaminants provided by the present application can be obtained by simple mixing and stirring, and has the advantages of less formula components, simple preparation method, mild preparation conditions, no waste organic reagents, waste organic solvents, waste acids and by-products generated in the preparation process, high product yield and low energy consumption.

[0021] (3) In the formula of the cleaning agent for removing radioactive contaminants provided by the present application, the composite surfactant directly affects the decontamination effect and the stability of the cleaning agent. After adding an appropriate amount of natural product and chelating agent, the synergistic effect between the natural product with radiation protection effect and the chelating agent not only enhances the decontamination effect of the cleaning agent, but also achieves a decontamination efficiency of more than 86% for the three national standard contaminated cloths, and can efficiently remove radiation ions while achieving decontamination, thereby having the dual effects of decontamination and radionuclide removal.

[0022] (4) The cleaning agent for removing radioactive contaminants provided by the present application has a high decontamination effect under the premise of a small amount of chelating agent in the formula, high system stability, solves the problem of excessive content of chelating agent / complexing agent in the formula of the existing detergent, which causes the system to be unstable and prone to stratification, and is more convenient for storage and transportation. DETAILED DESCRIPTION

[0023] Now, various exemplary embodiments of the present application will be described in detail. It should be understood that the detailed description is not to be considered limited to the present application, but is intended to be illustrative of certain aspects, features and embodiments of the present application.

[0024] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. In addition, where particular ranges of values are given, understand that each intervening value, to the upper or lower limit of the ranges is also specifically included. The upper and lower limits of these intervening values are also specifically included within the scope of the present application. The stated ranges of values are only meant to serve as a threshold for each variable. These ranges are not meant to exclude other values outside the stated ranges.

[0025] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Although any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present application, the preferred methods and materials are described. All patents, patent applications, publications, and descriptions mentioned herein are incorporated by reference to the extent allowed by law. In the case of conflict between the description herein and the incorporated material, the description herein shall control.

[0026] In the description of the present application, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, those skilled in the art will recognize that the present application can be practiced without the specific details given herein. Other implementations of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. Therefore, the scope of the present application is not intended to be limited by the description contained herein.

[0027] As used herein, the terms "comprises", "comprising", "includes", "including", "has", "having", "contains", "containing", or variations thereof, are intended to be open-ended terms that mean including, but not limited to.

[0028] Example 1

[0029] A cleaning agent for removing radioactive contaminants, consisting of the following components in mass percentage:

[0030] A. Surfactant: modified oil ethoxylate sulfonate SNS-8010%;

[0031] B. Chelating agent: tartaric acid and gluconic acid 30%, mass ratio of tartaric acid to gluconic acid is 3:2;

[0032] C. Natural product: vitamin E 0.3%;

[0033] D. Deionized water: added to 100%.

[0034] The preparation method of the cleaning agent for removing radioactive contaminants is as follows:

[0035] S1. Clean and disinfect the production equipment used, and weigh each component according to the mass percentage above;

[0036] S2. Dissolve modified oil ethoxylate sulfonate SNS-80 in deionized water, stir uniformly at room temperature to obtain a surfactant solution;

[0037] S3. Add tartaric acid and gluconic acid to the solution obtained in S2, stir uniformly at a stirring rate of 300-800 rpm to obtain a uniform, stable and transparent solution, then add natural product vitamin E, stir uniformly at the aforementioned stirring rate to obtain a uniform, transparent high-salt-tolerant surfactant system.

[0038] Example 2

[0039] The product formula differs from that of Example 1 in that the chelating agent is replaced by a mixture of tartaric acid and sodium diethylene triamine pentaacetate (DTPA) at a mass ratio of 3:7, the content of the chelating agent is 10%, and the reduced part is added to 100% by deionized water. The cleaner preparation method is referred to Example 1.

[0040] Example 3

[0041] The product formula differs from that of Example 1 in that the natural product is replaced by vitamin E 0.8% and resveratrol E 1.2%, the types and contents of surfactants and chelating agents are the same as those in Example 1, and the balance is deionized water. The cleaner preparation method is referred to Example 1.

[0042] Example 4

[0043] The product formula differs from that of Example 3 in that the surfactant is replaced by modified oil ethoxylate sulfonate SNS-80 10% and fatty alcohol polyalkoxy ether LX-1509 10%, which indicates that the content of active agent is increased, and the amount of deionized water is correspondingly reduced. The cleaner preparation method is referred to Example 1.

[0044] Example 5

[0045] The product formula differs from that of Example 1 in that the surfactant is replaced by alcohol ether carboxylate AEC-9Na 10% and isomeric alkyl glycoside IC-065%; the chelating agent is replaced by glutamic acid diacetate tetrasodium GLDA 15%; the natural product is replaced by soybean isoflavone 1% and gallic acid 0.6%, and the balance is deionized water. The cleaner preparation method is referred to Example 1.

[0046] Example 6

[0047] The product formula differs from Example 5 in that the chelating agent is replaced by tetrasodium glutamate diacetate GLDA 9% and trisodium methylglycinate diacetate MGDA 11%; the natural product is replaced by soy isoflavones 1% and procyanidins 0.8%; the surfactant is alcohol ether carboxylate AEC-9Na 10% and isomeric alkyl glycoside IC-06 5%; and the balance is deionized water. The cleaner is prepared according to Example 1.

[0048] Example 7

[0049] The product formula differs from Example 5 in that the natural product is replaced by tea polyphenols 0.4% and soy isoflavones E 0.6%; the surfactant is alcohol ether carboxylate AEC-9Na 10% and isomeric alkyl glycoside IC-06 5%; the chelating agent is tetrasodium glutamate diacetate GLDA 15%; and the balance is deionized water. The cleaner is prepared according to Example 1.

[0050] Example 8

[0051] The product formula differs from Example 5 in that the surfactant is replaced by sodium dodecyl diphenyl ether disulfonate 2A1 11%, fatty alcohol polyalkoxy ether LX-150 98%, and isomeric alkyl glycoside IC-06 3%; the natural product is tea polyphenols 0.4% and soy isoflavones E 0.6%; the chelating agent is tetrasodium glutamate diacetate GLDA 15%; and the balance is deionized water. The cleaner is prepared according to Example 1.

[0052] Example 9

[0053] The product formula differs from Example 8 in that the chelating agent is replaced by trisodium methylglycinate diacetate MGDA 11%, sodium diethylene triamine pentaacetate DTPA 5%, and tetrasodium glutamate diacetate GLDA 8%; the surfactant is sodium dodecyl diphenyl ether disulfonate 2A1 11%, fatty alcohol polyalkoxy ether LX-150 98%, and isomeric alkyl glycoside IC-06 3%; the natural product is tea polyphenols 0.4% and soy isoflavones E 0.6%; and the balance is deionized water. The cleaner is prepared according to Example 1.

[0054] Example 10

[0055] The product formula differs from Example 9 in that the natural product is replaced by vitamin E 0.3%, soy isoflavones 0.7%, tremella polysaccharide 0.2%, and lavender essential oil 1%; the chelating agent is trisodium methylglycinate diacetate MGDA 11%, sodium diethylene triamine pentaacetate DTPA 5%, and tetrasodium glutamate diacetate GLDA 8%; the surfactant is sodium dodecyl diphenyl ether disulfonate 2A1 11%, fatty alcohol polyalkoxy ether LX-150 98%, and isomeric alkyl glycoside IC-06 3%; and the balance is deionized water. The cleaner is prepared according to Example 1.

[0056] Comparative Example 1

[0057] The difference from Example 1 is that no natural product ingredient is added in the formula, and the reduced mass fraction is supplemented by deionized water to make the sum of the components in the cleaner 100%. The cleaner preparation method refers to Example 1.

[0058] Comparative Example 2

[0059] The difference from Example 1 is that no chelating agent ingredient is added in the formula, and the reduced mass fraction is supplemented by deionized water to make the sum of the components in the cleaner 100%. The cleaner preparation method refers to Example 1.

[0060] Comparative Example 3

[0061] The difference from Example 1 is that no chelating agent and natural product ingredients are added in the formula, and the reduced mass fraction is supplemented by deionized water to make the sum of the components in the cleaner 100%. The cleaner preparation method refers to Example 1.

[0062] The technical effects of several radionuclide-containing cleaning agents prepared in Examples 1-10 of the present application are further illustrated in Examples 11-13 below. The three national standard soiled cloths (sebum soiled cloth, product code: JB-01; protein soiled cloth, product code: JB-02; carbon black soiled cloth, product code: JB-03) and standard laundry liquid in the following examples were purchased from Zhongqing Inspection and Certification Co., Ltd., New Zealand rabbits (11 males) were purchased from Xi'an Deluopu Biomedical Co., Ltd., and the radiation contaminant samples were taken from the China Institute for Radiation Protection.

[0063] Example 11

[0064] The decontamination power of several radionuclide-removing cleaning agents prepared in Examples 1-10 was detected using the three national standard soiled cloths, and the detection was based on GB / T131742008 "Determination of Decontamination Power and Circulating Washing Performance of Detergents for Clothing". The specific detection process and method are as follows:

[0065] S1, Sample preparation: prepare 250 ppm washing water according to GB / T131742008, in which the molar ratio of calcium and magnesium ions is 3:2. The test solution of the example is prepared into a 0.1% solution with 250 ppm washing water.

[0066] S2, detergency detection: with sebum stained cloth, protein stained cloth, carbon black stained cloth three kinds of national standard stained cloth as evaluation stained cloth, using Beijing Kangguang optical instrument Co., Ltd. WSD3U fluorescence whiteness meter to measure the whiteness value of three kinds of stained cloth before washing. The vertical decontamination machine is used to complete 3 times of washing, the washing time is 20 min, the washing temperature is (30±0.5) ℃ and (5±1) ℃, the stirring speed is 120 r / min, after washing, the three kinds of stained cloth are rinsed, dried, and the whiteness value of the three kinds of stained cloth after washing is measured by WSD3U fluorescence whiteness meter. The whiteness difference ratio ΔW is calculated as follows formula (1):

[0067]

[0068] In formula (1), W1 is the whiteness value before washing of the stained cloth using the standard laundry liquid; W2 is the whiteness value after washing of the stained cloth using the standard laundry liquid; W3 is the whiteness value before washing of the stained cloth using the example to be tested liquid; W4 is the whiteness value after washing of the stained cloth using the example to be tested liquid

[0069] S3, detection result judgment: taking ΔW as the detection index, when ΔW value is less than 1, it indicates that the decontamination ability of the to-be-tested liquid is less than that of the standard laundry liquid; when ΔW value is greater than 1, it indicates that the decontamination ability of the to-be-tested liquid is greater than that of the standard laundry liquid, and the greater the ΔW value, the stronger the decontamination ability of the to-be-tested liquid. When ΔW≥1.10, it indicates that the to-be-tested liquid has good washing and decontamination performance.

[0070] The experimental results are shown in Table 1.

[0071] Table 1 decontamination effect on three kinds of international stained cloth

[0072] Model JB-01 JB-02 JB-03 JB-04 JB-05 JB-06 JB-07 JB- 1 1.01 1.10 1.13 2 1.03 1.11 1.15 3 1.05 1.18 1.18 4 1.14 1.35 1.28 5 1.10 1.28 1.25 6 1.08 1.01 0.99 7 1.10 1.04 1.12 8 1.11 1.25 1.08 9 1.18 1.26 1.10 10 1.25 1.37 1.28

[0073] From Table 1, it can be seen that after the cleaning agent prepared by examples 1 to 10 is used to wash the sebum stained cloth (JB-01), the protein stained cloth (JB-02) and the carbon black stained cloth (JB-03), the whiteness difference ratio ΔW of the three kinds of stained cloth after washing in each example is greater than 1, which indicates that the decontamination ability of the cleaning agent for removing radionuclides provided by the application is greater than that of the standard laundry liquid, and the addition of chelating agent and natural product in the formula can improve the decontamination effect of the cleaning agent. Especially, the decontamination effect of example 10 which is compounded by adding multiple components is the best, because the components play a synergistic effect.

[0074] Example 12

[0075] The embodiment is to test the skin irritation performance of several radionuclide-containing cleaning agents prepared in Examples 1-10 and Comparative Example 1. The test subjects are 11 male New Zealand rabbits. The test is performed according to GB / T21604-2008 "Chemical Acute Skin Irritation and Corrosion Test Method". The specific test process and method are as follows:

[0076] S1, sample preparation and test subject skin preparation: 0.5 g of each of the 11 cleaning agents prepared in Examples 1-10 and Comparative Example 1 is weighed, then added with deionized water for proper wetting, and sequentially numbered as 1-11 according to the order of examples. The test subjects are sequentially numbered as 1-11 (i.e., Examples 1-10 correspond to numbers 1-10, and Comparative Example 1 corresponds to number 11). 24 hours before the test, the test subjects are prepared for skin (i.e., the fur on both sides of the dorsal spine of the 11 New Zealand rabbits is removed without damaging the epidermis), and the fur removal range is about 3 cm x 3 cm.

[0077] S2, skin irritation test: the prepared skin of the 11 rabbits is roughly divided into two halves, then 0.5 g of each of the cleaning agent samples 1-11 prepared in step S1 is directly applied to one side of the prepared skin according to the order, and the other side of the skin is not treated as a blank control. Then, gauze is covered and fixed with a non-irritating bandage, and applied for 4 hours.

[0078] S3, test result observation and analysis: after the test is completed, the remaining test subjects are removed with warm water, and the skin reaction at the application site is observed 24 hours, 48 hours and 72 hours after the test subjects are removed, respectively, and the irritation reaction score is calculated. The average score of each animal is calculated, scored according to Table 2, and the skin irritation intensity is determined according to Table 3, and the irritation intensity is graded according to the skin irritation intensity grading standard. Each observation of the application site skin has no erythema and edema formation, and is scored and recorded according to the skin irritation reaction scoring standard, and the calculation formula is as follows formula (2), and the statistical results are shown in Table 4.

[0079]

[0080] Table 2 Skin irritation scoring standard

[0081]

[0082] Table 3 Skin irritation intensity grading standard

[0083]

[0084]

[0085] Table 4 Acute skin irritation / corrosion test result record table

[0086]

[0087] As shown in Table 4, at the observation time points, none of the test animals 1-10 exhibited erythema or edema, nor did they show any skin irritation or corrosion symptoms. After 24h, 48h, and 72h of removal of the test substance, the mean skin irritation response score for each animal was 0. According to the GB-T21604-2008 skin irritation intensity grading standard, this indicates non-irritation. In Comparative Example 1, test animal 11 showed mild erythema at 72h. Compared with other examples, the addition of natural products ensured the safe and anti-allergic properties of the skin surface.

[0088] Example 13

[0089] This embodiment describes the cleaning agents prepared in Examples 1-10 and Comparative Examples 1-3 for the treatment of radionuclides. 137 The removal effect of Cs, etc., and the specific detection process and methods are as follows:

[0090] S1. Sample preparation method: Prepare samples containing radioactive nuclides separately. 137 The Cs contaminant solution was prepared to a concentration of 1163.6 Bq / ml.

[0091] S2. Immerse hair and white cotton cloth in a solution containing radiation ions, and test the concentration of radiation ions in the hair and white cotton cloth after being contaminated by the radiation ion-contaminated solution. The specific detection method is as follows:

[0092] The weight of each group of hair samples was 1.000g ± 0.050g, and the background radiation element concentration was recorded. The hair was then placed in a conical flask containing the contaminating solution, and the radiation element concentration of the hair after contamination was recorded. After shaking to remove the contaminant, the hair was washed and dried, and the residual radiation element concentration was recorded. This process was repeated three times.

[0093] The cotton cloth was fixed in the locator, and the background radiation element concentration was recorded. After adding the contaminating solution, the cloth was dried, and the radiation element concentration of the contaminated cloth was recorded. Then, in a beaker containing a 7.5 g / L sample solution from the example, the locator was fixed using a cage stirrer, stirred to remove contaminants, cleaned, and dried. The radiation element concentration of residual hair after cleaning was recorded. This process was repeated three times.

[0094] S3. Decontamination Rate Calculation: Based on the difference between the radiation element concentration after decontamination and the radiation element concentration before decontamination, the decontamination rate is further calculated, the average decontamination rate is calculated, and finally, the low-dose values ​​are removed, and the average decontamination rate is taken. The experimental results are shown in Table 5.

[0095] Table 5 shows the results of decontamination of radioactive elements.

[0096]

[0097]

[0098]

[0099] As can be seen from Table 5, by comparing Examples 1-10 with Comparative Examples 1-3, it is found that the synergistic effect of adding chelating agents and natural products in the decontamination cleaning agent formula of the present application can significantly improve the decontamination effect on radiation ions. Among them, the decontamination effect is enhanced with the increase of the added natural product ingredients in Examples 3 and 4; the decontamination effect of GLDA in Example 5 is better than that of the chelating agents added in Examples 1-4; in Examples 6-10, multiple chelating agents and natural product ingredients are added, and at the same time, compared with Comparative Examples 1-3, it is shown that the higher the content of chelating agents and natural product ingredients, the better the decontamination effect.

Claims

1. A cleaning agent for removing radioactive contaminants, characterized in that, The cleaning agent comprises the following components and their mass percentage content: surfactant 5-20%, chelating agent 10-30%, natural product 0.3-2%, and the balance being deionized water; The surfactant is a mixture of sodium dodecyl diphenyl ether disulfonate 2A1, fatty alcohol polyalkoxy ether LX-1509 and isomeric alkyl glycoside IC-06 in a mass ratio of 11:8:

3. The chelating agent is a mixture of trisodium methylglycine diacetate, sodium diethylenetriaminepentaacetate, and tetrasodium glutamate diacetate in a mass ratio of 11:5:

8. The natural product is a mixture of vitamin E, soy isoflavones, tremella polysaccharide and lavender essential oil in a mass ratio of 3:7:2:

10.

2. The application of the cleaning agent for removing radioactive contaminants as described in claim 1 in the nuclear industry as a special detergent, special stain remover, special bath product or special bath product additive.

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