Iodine adsorbing material, preparation method and application thereof
By preparing honeycomb ceramics coated with copper-based microporous molecular sieves, the thermal stability and cost issues of iodine adsorption materials in existing technologies have been solved, achieving efficient and low-cost adsorption of radioactive iodine, which is suitable for the purification of gaseous radioactive iodine in nuclear fuel reprocessing and nuclear power plant accidents.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA INST FOR RADIATION PROTECTION
- Filing Date
- 2023-08-15
- Publication Date
- 2026-06-12
AI Technical Summary
In existing technologies, impregnated activated carbon and silver-coated silica gel have problems such as low auto-ignition temperature, easy deactivation due to aging, high cost, and easy deactivation upon exposure to light when purifying radioactive iodine, which limit their use in industrial applications.
A copper-based microporous molecular sieve coated with a honeycomb ceramic was used as an iodine adsorbent. The copper-based microporous molecular sieve with a three-dimensional microporous structure was prepared by mixing a synthetic template agent, liquid alkali, pseudoboehmite and silica sol, and then loaded onto the honeycomb ceramic to form an iodine adsorbent.
It improves the atomic utilization rate of iodine adsorption, reduces material costs, enhances thermal stability and acid resistance, can be stored in air, maintains the performance of highly efficient adsorption of radioactive iodine, and is suitable for high temperature and NO2 atmospheres.
Smart Images
Figure CN117138747B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of radioactive waste gas treatment technology, specifically relating to an iodine adsorption material, its preparation method, and its application. Background Technology
[0002] Nuclear fuel reprocessing and nuclear power plant accidents release large amounts of radionuclides. Radioactive iodine and radioactive organic iodine are among the main airborne radioactive emissions, posing serious hazards to humans and the environment. Generally, nuclear power plants use impregnated activated carbon to adsorb and purify radioactive elemental iodine and organic iodine from the gas. However, activated carbon suffers from low auto-ignition temperature, easy deactivation due to aging, and severe susceptibility to acidic nitrogen oxides. On the other hand, nuclear fuel reprocessing plants use silver-coated silica gel to adsorb and purify radioactive elemental iodine and organic iodine, but silver-coated silica gel is mainly characterized by high cost and easy deactivation upon exposure to light. Therefore, both impregnated activated carbon and silver-coated silica gel face many limitations in industrial applications. Summary of the Invention
[0003] In view of the above-mentioned technical problems existing in the prior art, the purpose of the present invention is to provide an iodine adsorbent material with low cost, long service life, easy long-term storage and good adsorption effect, as well as its preparation method and application.
[0004] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: an iodine adsorption material, which is a honeycomb ceramic coated with a copper-based microporous molecular sieve.
[0005] This invention also provides a method for preparing an iodine adsorbent material, comprising the following steps:
[0006] (1) Mix the synthetic template agent and liquid alkali, stir evenly, add boehmite, then add silica sol and deionized water and stir evenly to obtain a mixed solution;
[0007] (2) The mixture is put into a reaction vessel for crystallization. After crystallization, the solid crystal product is cooled and separated. The solid crystal product is washed until neutral and dried. It is then calcined in air to obtain a small-pore molecular sieve.
[0008] (3) Add the ammonium salt solution to the small-pore molecular sieve, heat in a water bath, separate the solid product and dry it;
[0009] (4) Add copper salt solution to the above solid product, heat in a water bath to separate the product, dry it and calcine it in air to obtain copper-based microporous molecular sieve.
[0010] (5) The above copper-based molecular sieve is mixed with deionized water, and aluminum sol is added and stirred to obtain a slurry product; the viscosity of the slurry product is adjusted, the slurry product is coated on a cordierite carrier, dried, and calcined in air to obtain a copper-based microporous molecular sieve supported on a honeycomb ceramic.
[0011] Further, in step (1), the synthetic template agent is selected from one or more of tetraethylammonium hydroxide, benzyltrimethylammonium hydroxide, choline chloride, and N,N,N,-trimethyl-1-adamantylammonium hydroxide.
[0012] Further, in step (1), the molar ratio of silica sol, pseudoboehmite, liquid alkali, synthetic template agent and deionized water is 0.2-1.5: 0.01-0.04: 0.01-0.025: 0.02-0.5: 10-20.
[0013] Further, in step (2), the crystallization temperature is 120-200℃, the crystallization time is 0.5-5 days, the drying temperature is 80-100℃, the drying time is 5-24 hours, and the calcination temperature is 300-650℃.
[0014] Furthermore, in step (3), the ammonium salt is selected from one or more of the nitrates, chlorides, and sulfates containing ammonium ions; the water bath temperature is 70-90℃, and the time is 2-6 hours.
[0015] Further, in step (4), the copper salt is selected from one or more of copper-containing nitrates, chlorides, sulfates, and phosphates; the water bath temperature is 70-90℃, and the time is 2-6 hours; the pH of the copper salt solution is 3-5; and the calcination temperature is 400-600℃.
[0016] The present invention also provides an application of an iodine adsorbent material, wherein the iodine adsorbent material is a honeycomb ceramic coated with a copper-based microporous molecular sieve, used for the purification of gaseous radioactive elemental iodine and organic iodine.
[0017] The beneficial effects of adopting the technical solution of this invention are as follows: An iodine adsorbent material, its preparation method, and its application are described. The iodine adsorbent material of this invention is a copper-based microporous molecular sieve supported on a honeycomb ceramic with a three-dimensional microporous structure. Copper is loaded onto the ion exchange sites of the microporous molecular sieve, improving the atomic utilization rate of iodine adsorption. Compared with silver-based materials, the preparation cost is greatly reduced, and it can be stored in air without the need for light protection or low-temperature refrigeration, making storage convenient. Compared with impregnated activated carbon materials, the thermal stability and acid resistance of the material are improved. Even after high-temperature hydrothermal treatment or in an atmosphere containing high concentrations of NO2, the efficiency of radioactive iodine adsorption remains above 95%. The iodine adsorbent material of this invention can be widely used for the adsorption of elemental iodine and organic iodine; and the preparation method of the iodine adsorbent material of this invention is simple and easy to operate. Attached Figure Description
[0018] Figure 1 The XRD pattern of the iodine adsorbent Cu / SSZ-13 prepared in Example 2 of this invention before hydrothermal aging;
[0019] Figure 2 The XRD pattern of Cu / SSZ-13 iodine adsorbent material prepared in Example 2 of this invention after hydrothermal aging;
[0020] Figure 3 The XRD pattern of the iodine adsorbent Cu / SSZ-13 prepared in Example 2 of the present invention after adsorption for 6 hours in an atmosphere containing 12% NO2.
[0021] Figure 4 The XRD pattern of the Cu / Beta iodine adsorbent material prepared in Example 3 of this invention before hydrothermal aging;
[0022] Figure 5 The XRD pattern of the Cu / Beta iodine adsorbent material prepared in Example 3 of this invention after hydrothermal aging;
[0023] Figure 6 The XRD pattern of the iodine adsorbent Cu / Beta prepared in Example 3 of the present invention after adsorption for 6 hours in an atmosphere containing 12% NO2.
[0024] Figure 7 The XRD pattern of the iodine adsorbent Cu / ZSM-5 prepared in Example 4 of this invention before hydrothermal aging;
[0025] Figure 8 The XRD pattern of Cu / ZSM-5 iodine adsorbent material prepared in Example 4 of this invention after hydrothermal aging;
[0026] Figure 9 The XRD pattern of the iodine adsorbent Cu / ZSM-5 prepared in Example 4 of this invention after adsorption for 6 hours in an atmosphere containing 12% NO2. Detailed Implementation
[0027] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0028] Example 1
[0029] This invention provides an iodine adsorption material, which is a honeycomb ceramic coated with a copper-based microporous molecular sieve.
[0030] This invention also provides a method for preparing an iodine adsorbent material, comprising the following steps:
[0031] (1) Mix the synthetic template agent and liquid alkali, stir evenly, add boehmite, then add silica sol and deionized water and stir evenly to obtain a mixed solution;
[0032] (2) The mixture is put into a reaction vessel for crystallization. After crystallization, the solid crystal product is cooled and separated. The solid crystal product is washed until neutral and dried. It is then calcined in air to obtain a small-pore molecular sieve. The mixture is washed with deionized water. A stainless steel reaction vessel is used.
[0033] (3) Add the ammonium salt solution to the small-pore molecular sieve, heat in a water bath, separate the solid product and dry it; the water bath process is an ion exchange process;
[0034] (4) Add copper salt solution to the above solid product, separate the product after water bath heating, dry and calcine in air to obtain copper-based microporous molecular sieve; the water bath process is an ion exchange process to load ammonium ions to replace the cations in the molecular sieve.
[0035] (5) The above copper-based molecular sieve is mixed with deionized water, and aluminum sol is added and stirred to obtain a slurry product; the viscosity of the slurry product is adjusted, the slurry product is coated on a cordierite carrier, dried, and calcined in air to obtain a copper-based microporous molecular sieve supported on a honeycomb ceramic.
[0036] The iodine adsorbent material of this invention has a three-dimensional microporous structure and a stable structure that is resistant to high temperature of 600℃ and acidic nitrogen oxide corrosion. The active component copper is dispersed in the acidic sites of the molecular sieve in the form of single atoms, which greatly improves the atomic utilization rate of iodine adsorption. This invention is the first to coat copper-based microporous molecular sieve adsorbent powder onto a honeycomb ceramic carrier as an iodine adsorption bed, which effectively reduces the internal diffusion distance of iodine molecules in the molecular sieve and improves the adsorption efficiency and copper atom utilization rate.
[0037] Preferably, in step (1), the synthetic template agent is selected from one or more of tetraethylammonium hydroxide, benzyltrimethylammonium hydroxide, choline chloride, and N,N,N,-trimethyl-1-adamantylammonium hydroxide.
[0038] Preferably, in step (1), the molar ratio of silica sol, pseudoboehmite, liquid alkali, synthetic template agent and deionized water is 0.2-1.5: 0.01-0.04: 0.01-0.025: 0.02-0.5: 10-20.
[0039] Preferably, in step (2), the crystallization temperature is 120-200℃, the crystallization time is 0.5-5 days, the drying temperature is 80-100℃, the drying time is 5-24 hours, and the calcination temperature is 300-650℃.
[0040] Preferably, in step (3), the ammonium salt is selected from one or more of the ammonium-containing nitrates, chlorides, and sulfates; the water bath temperature is 70–90°C, and the time is 2–6 hours. The water bath process promotes the exchange of cations.
[0041] Preferably, in step (4), the copper salt is selected from one or more of copper-containing nitrates, chlorides, sulfates, and phosphates; the water bath temperature is 70-90°C and the time is 2-6 hours; the pH of the copper salt solution is 3-5; and the calcination temperature is 400-600°C.
[0042] Preferably, in step (5), the copper-based microporous molecular sieve supported by the honeycomb ceramic is a copper-based microporous molecular sieve supported by cordierite.
[0043] This invention also provides an application of an iodine adsorbent material, which is a honeycomb ceramic coated with a copper-based microporous molecular sieve, used for the purification of gaseous radioactive elemental iodine and organic iodine.
[0044] First, the iodine adsorbent material of this invention, namely a copper-based microporous molecular sieve supported on cordierite, was loaded into a fixed-bed reactor with an inner diameter of 20 mm and a height of 10 mm. The reactor was then placed in a constant-temperature chamber to control the adsorption temperature. The experimental temperature range was 30–150 °C, the inlet gas velocity was 0.2 m / s, the relative humidity of the gas flow was 3–95%, and the operating pressure was 101 kPa. The testing process consisted of three stages: equilibration, feeding, and purging. After all operating parameters stabilized, feeding was initiated for 60 minutes, resulting in a radiolabeled Class A iodine mass concentration of 1.75 mg / m³. 3 The material was then purged with high-purity nitrogen for 60 minutes. Following the test bed, it passed through two backup beds containing highly efficient adsorbents for removing methyl iodine, used to completely capture the radioactive grade A iodine that had passed through the test bed. After purging, the gamma radioactivity counts of the materials in the test bed and backup beds were measured using a gamma counter or multichannel gamma spectrometer to determine the adsorption performance of the iodine adsorbent material of this embodiment.
[0045] Example 2
[0046] Iodine adsorbent material was prepared using the method described in Example 1 of this invention. 33.76 g of N,N,N-trimethyl-1-adamantyl ammonium hydroxide (25 wt% aqueous solution) and 1.74 g of liquid alkali solution (45 wt%) were mixed evenly in a flask and mechanically stirred for 30 min. 1.32 g of pseudoboehmite was added, and the mixture was mechanically stirred for 1 h. 96 g of silica sol solution (25 wt%) and 44.9 g of deionized water were added, and the mixture was mechanically stirred for 30 min. After thorough mixing, the mixture was transferred to a 200 mL stainless steel reactor and crystallized in a 160 °C oven for 96 h. After crystallization, the mixture was cooled to room temperature, centrifuged, washed with water to obtain the product, and dried at 100 °C for 12 h. The template agent was removed by calcination: the powder sample was heated to 650 °C in a muffle furnace at a rate of 2 °C / min and maintained for 4 h.
[0047] 10g of the prepared molecular sieve powder was mixed with 100mL of 1mol / L ammonium nitrate solution for ion exchange at 80℃ for 4h; then dried at 100℃ for 12h; the resulting product was then mixed with 100mL of 1mol / L copper sulfate solution for ion exchange at 80℃ for 1h to obtain the iodine adsorbent Cu / SSZ-13 molecular sieve.
[0048] The rest is the same as in Example 1.
[0049] The Cu / SSZ-13 molecular sieve prepared according to the embodiments of the present invention contained 5.0% copper, as determined by inductively coupled plasma atomic emission spectrometry.
[0050] Example 3
[0051] Iodine adsorbent material was prepared using the method described in Example 1 of this invention. 75g of silica sol and 2.04g of pseudoboehmite were added to a flask and mixed evenly. Then, 73.5g of tetraethylammonium hydroxide was added, and the mixture was stirred vigorously for 4 hours. The mixture was then transferred to a 200mL stainless steel reactor and crystallized in a 160℃ oven for 96 hours. After crystallization, the mixture was cooled to room temperature, and the product was separated using a centrifuge. It was washed with deionized water until neutral and then dried at 100℃ for 12 hours. The template agent was removed by calcination: the powder sample was heated to 550℃ in a muffle furnace at a rate of 2℃ / min and maintained for 4 hours.
[0052] 10g of the prepared molecular sieve powder was mixed with 100mL of 1mol / L ammonium nitrate solution for ion exchange at 80℃ for 4h; then dried at 100℃ for 12h; the resulting product was then mixed with 100mL of 1mol / L copper sulfate solution for ion exchange at 80℃ for 1h to obtain the iodine adsorbent Cu / Beta molecular sieve.
[0053] The rest is the same as in Example 1.
[0054] The Cu / Beta molecular sieve prepared in the embodiments of the present invention contained 4.8% copper, as determined by inductively coupled plasma optical emission spectroscopy.
[0055] Example 4
[0056] Iodine adsorbent material was prepared using the method described in Example 1 of this invention. 50g of silica sol and 1.72g of pseudoboehmite were added to a flask, followed by 120mL of deionized water, and mixed thoroughly. Then, 50mL of n-butylamine and 3g of sodium hydroxide were added. The mixture was stirred vigorously for 4 hours. The solution was then transferred to a 200mL stainless steel reactor and crystallized in a 160℃ oven for 68 hours. After crystallization, the mixture was cooled to room temperature, and the product was separated using a centrifuge and washed with deionized water until neutral. It was then dried at 100℃ for 12 hours. The template agent was removed by calcination: the powder sample was heated to 550℃ in a muffle furnace at a rate of 2℃ / min and maintained for 4 hours.
[0057] 10g of the prepared molecular sieve powder was mixed with 100mL of 1M ammonium nitrate solution for ion exchange at 80℃ for 4h; then dried at 100℃ for 12h; the resulting product was then mixed with 100mL of 1M copper sulfate solution for ion exchange at 80℃ for 1h to obtain Cu / ZSM-5 molecular sieve, an iodine adsorbent.
[0058] The rest is the same as in Example 1.
[0059] The Cu / ZSM-5 molecular sieve prepared according to the present invention was found to contain 5.4% copper by inductively coupled plasma optical emission spectroscopy.
[0060] The Cu / SSZ-13 molecular sieve, Cu / Beta molecular sieve, and Cu / ZSM-5 molecular sieve prepared in Examples 2 to 4 of this invention were subjected to high-temperature hydrothermal aging performance tests at 600℃ and iodine adsorption performance tests after adsorption for 6 hours in an atmosphere containing 12% NO2.
[0061] See attached document Figure 1 , 2 Figures 4, 5, 7, and 8 indicate that the copper-based microporous molecular sieve prepared in the embodiments of the present invention has ultra-high thermal stability. Under an atmosphere containing 10 vol% water vapor, a high temperature of 600°C did not damage the crystal structure of the material.
[0062] See attached document Figure 3 , 6 Figures 9 and 9 indicate that the copper-based microporous molecular sieves prepared in the embodiments of the present invention all have good acid resistance, and the crystal structure does not collapse under an atmosphere containing 12% NO2.
[0063] Comparative Example
[0064] Colorless silica gel with a specific particle size and pore size was sieved, pretreated by heating, then soaked in silver nitrate solution. The residual liquid was poured off, and the gel was dried at a constant temperature to obtain silver-loaded silica gel (Ag@Silica gel). The silver loading was determined by back-titration of NaCl with standard silver nitrate. The silver loading was found to be 6.2%.
[0065] Silver-coated silicone typically has a heat resistance temperature of 200–300°C, but the comparative sample was not subjected to a high-temperature hydrothermal aging test at 600°C.
[0066] The BET specific surface area and the adsorption of dynamic elemental iodine and organic iodine before and after high-temperature hydrothermal aging and acid treatment of Examples 2 to 4 and the comparative examples of the present invention are shown in Tables 1, 2 and 3.
[0067] Table 1. BET specific surface area of different materials in the comparative examples and embodiments before and after hydrothermal treatment and acid treatment.
[0068]
[0069] This indicates that the copper-based microporous molecular sieve prepared in the embodiments of the present invention maintains a considerable BET specific surface area after high-temperature hydrothermal aging, indicating that the pore structure of the adsorbent itself does not change much; under an atmosphere containing 12% NO2, the pore structure of the molecular sieve remains intact, and the specific surface area does not decrease significantly.
[0070] Table 2 shows the adsorption performance of elemental iodine and organic iodine of different materials in the comparative examples and embodiments after hydrothermal treatment.
[0071]
[0072] This indicates that the copper-based microporous molecular sieve prepared in the embodiments of the present invention still maintains a high level of iodine adsorption performance after hydrothermal aging treatment. This demonstrates that the copper-based microporous molecular sieve prepared in the embodiments of the present invention can still maintain excellent iodine adsorption performance under special high-temperature exhaust gas application conditions such as nuclear waste reprocessing plants; while the silver-coated silica gel in the comparative example typically has a heat resistance temperature of 200-300℃, and its thermal stability is far inferior to that of the copper-based microporous molecular sieve material of the embodiments of the present invention.
[0073] Table 3 shows the adsorption properties of elemental iodine and organic iodine of different materials before and after acid treatment in the comparative examples and embodiments.
[0074]
[0075] The results show that the Cu / SSZ-13 molecular sieve prepared in the embodiments of the present invention exhibits a 15% decrease in the adsorption capacity of elemental iodine after acid treatment, while the Cu / Beta molecular sieve exhibits a 22% decrease in the adsorption capacity of organic iodine. In contrast, the silver-coated silica gel in the comparative example shows a 27% and 34% decrease in the adsorption capacity of elemental iodine and organic iodine, respectively, after acid treatment. This demonstrates that the copper-based microporous molecular sieves of the embodiments of the present invention exhibit superior acid resistance compared to traditional silver-coated silica gel materials.
[0076] As shown in Tables 1, 2, and 3, the copper-based microporous molecular sieve iodine adsorbent prepared in the embodiments of the present invention can efficiently adsorb elemental iodine and organic iodomethane, with a maximum adsorption capacity of 455 mg / g I2 and 224 mg / g CH3I, and a maximum adsorption efficiency of 97%. Furthermore, the pore size of the microporous molecular sieve affects the material's adsorption capacity for iodine. The smaller the pore size of the Cu / SSZ-13 adsorbent, the greater its adsorption capacity and efficiency.
[0077] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention is also intended to include these modifications and variations.
Claims
1. An iodine adsorbent material, characterized in that, The iodine adsorbent is a honeycomb ceramic coated with a copper-based microporous molecular sieve, wherein the copper is loaded onto the ion exchange sites of the microporous molecular sieve. The iodine adsorbent is obtained through the following steps: (1) Mix the synthetic template agent and liquid alkali, stir evenly, add boehmite, then add silica sol and deionized water and stir evenly to obtain a mixed solution. The molar ratio of silica sol, boehmite, liquid alkali, synthetic template agent and deionized water is 0.2~1.5:0.01~0.04:0.01~0.025:0.02~0.5:10~20; (2) The mixture is put into the reaction vessel for crystallization. After crystallization, the solid crystal product is cooled and separated. The solid crystal product is washed until neutral and dried. It is then calcined in air to obtain a small-pore molecular sieve. Washing with deionized water; using a stainless steel reaction vessel; (3) Add the ammonium salt solution to the small-pore molecular sieve, heat in a water bath, separate the solid product and dry it; the water bath process is an ion exchange process; (4) Add copper salt solution to the above solid product, separate the product after heating in a water bath, dry it and calcine it in air to obtain copper-based small-pore molecular sieve, wherein the copper is loaded on the ion exchange sites of the small-pore molecular sieve; the water bath process is an ion exchange process. (5) Mix the above copper-based molecular sieve with deionized water, add aluminum sol and stir to obtain a slurry product; adjust the viscosity of the slurry product, coat the slurry product on a cordierite carrier, dry it, and calcine it in air to obtain a copper-based microporous molecular sieve supported on a honeycomb ceramic.
2. The method for preparing an iodine adsorbent material according to claim 1, characterized in that, Includes the following steps: (1) Mix the synthetic template agent and liquid alkali, stir evenly, add boehmite, then add silica sol and deionized water and stir evenly to obtain a mixed solution. The molar ratio of silica sol, boehmite, liquid alkali, synthetic template agent and deionized water is 0.2~1.5:0.01~0.04:0.01~0.025:0.02~0.5:10~20; (2) The mixture is put into the reaction vessel for crystallization. After crystallization, the solid crystal product is cooled and separated. The solid crystal product is washed until neutral and dried. It is then calcined in air to obtain a small-pore molecular sieve. Washing with deionized water; using a stainless steel reaction vessel; (3) Add the ammonium salt solution to the small-pore molecular sieve, heat in a water bath, separate the solid product and dry it; the water bath process is an ion exchange process; (4) Add copper salt solution to the above solid product, separate the product after heating in a water bath, dry it and calcine it in air to obtain copper-based microporous molecular sieve; the water bath process is an ion exchange process. (5) Mix the above copper-based molecular sieve with deionized water, add aluminum sol and stir to obtain a slurry product; adjust the viscosity of the slurry product, coat the slurry product on a cordierite carrier, dry it, and calcine it in air to obtain a copper-based microporous molecular sieve supported on a honeycomb ceramic.
3. The method for preparing an iodine adsorbent material according to claim 2, characterized in that, In step (1), the synthetic template agent is selected from one or more of tetraethylammonium hydroxide, benzyltrimethylammonium hydroxide, choline chloride, and N,N,N,-trimethyl-1-adamantylammonium hydroxide.
4. The method for preparing an iodine adsorbent material according to claim 2, characterized in that, In step (1), the molar ratio of silica sol, pseudoboehmite, liquid alkali, synthetic template agent and deionized water is 0.2~1.5:0.01~0.04:0.01~0.025:0.02~0.5:10~20.
5. The method for preparing an iodine adsorbent material according to claim 2, characterized in that, In step (2), the crystallization temperature is 120~200℃ and the crystallization time is 0.5~5 days; the drying temperature is 80~100℃ and the drying time is 5~24 hours; the calcination temperature is 300~650℃.
6. The method for preparing an iodine adsorbent material according to claim 2, characterized in that, In step (3), the ammonium salt is selected from one or more of the nitrates, chlorides, and sulfates containing ammonium ions; the water bath temperature is 70~90℃ and the time is 2~6 hours.
7. The method for preparing an iodine adsorbent material according to claim 2, characterized in that, In step (4), the copper salt is selected from one or more of copper-containing nitrates, chlorides, sulfates, and phosphates; the water bath temperature is 70~90℃ and the time is 2~6 hours; the pH of the copper salt solution is 3~5; and the calcination temperature is 400~600℃.
8. The method for preparing an iodine adsorbent material according to claim 2, characterized in that, In step (5), the copper-based microporous molecular sieve supported by the honeycomb ceramic is a copper-based microporous molecular sieve supported by cordierite.
9. The application of an iodine adsorbent material according to any one of claims 1 to 8, characterized in that, The iodine adsorbent is a honeycomb ceramic coated with a copper-based microporous molecular sieve, used for the purification of gaseous radioactive elemental iodine and organic iodine.