Adsorbing material for capturing radioactive element iodine
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A technology of radioactive elements and adsorption materials, which is applied in the field of adsorbent preparation, can solve the problems of high preparation cost, low preparation success rate, and poor adsorption effect, and achieve good adsorption effect, huge surface area, and uniform size
Active Publication Date: 2021-05-04
UNIV OF JINAN +1
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However, the existing adsorption materials have problems such as high preparati
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[0040] Example 1:
[0041] An adsorption material for capturing radioactive element iodine, the preparation steps are as follows:
[0042] (1) Mordenite is dissolved in water to form a suspension for subsequent use;
[0043] (2) configure the silver nitrate solution of 0.17mol / L under dark conditions for subsequent use;
[0044] (3) Pour the silver nitrate solution obtained in step (2) into the suspension obtained in step (1), and heat it to boiling under stirring and reflux. The boiling time is 1.5h, and wash the silver nitrate solution used in step (2) with deionized water. Utensils and washing liquid are also poured into the suspension, and washed at least 4 times;
[0045] (4) Quickly add sodium citrate to the boiling liquid in (3), and continue boiling for 1.5h to obtain mordenite sol, then stop heating and continue stirring until the temperature is lower than 70°C; the AgNO 3 , the mass ratio of sodium citrate and mordenite is 1:3.9:164;
[0046] (5) configure sodium...
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[0055] Example 2:
[0056] Add 1 g of mordenite to 1 L of 0.05 mM KI solution, stir for 24 h at normal temperature and pressure, filter with suction, dilute the supernatant, measure the absorbance with a UV spectrophotometer, and calculate I - concentration.
[0057] Compared with Example 1, the adsorption efficiency of mordenite in Example 2 is 46%, and the mordenite has a certain adsorption capacity, but the adsorption effect is not ideal.
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[0058] Example 3:
[0059] Add 1 g of Ag-mordenite prepared in step (7) of Example 1 into 1 L of 0.05 mM KI solution, stir for 24 h at normal temperature and pressure, filter with suction, dilute the supernatant, and measure the absorbance with a UV spectrophotometer , calculate I - Concentration, the adsorption efficiency of Ag-mordenite is 78%, and the mordenite modified by trace Ag has certain adsorption capacity.
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Abstract
The invention belongs to the technical field of adsorbent preparation, and particularly relates to an adsorbing material for capturing radioactive element iodine. The material is prepared by the following steps: (1) dissolving mordenite in water to form turbid liquid; (2) preparing a 0.1-0.2 mol/L silver nitrate solution under a dark condition; (3) pouring the silver nitrate solution into the turbid liquid, and heating to boil in a stirring reflux state; (4) quickly adding a first complexing agent into the boiling liquid in the step (3); (5) preparing a sodium carbonate solution, and adding the sodium carbonate solution into the step (4); (6) adding a reducing agent into the solution obtained in the step (5), uniformly stirring, and heating in a water bath at 80 DEG C for 30 minutes; (7) performing suction filtration on the product obtained in the step (6); (8) preparing 0.01-0.3 mol/L of a copper sulfate solution; (9) dissolving a second complexing agent in deionized water; (10) adding the copper sulfate solution into the solution obtained in the step (9) in a stirring state, and adding a stabilizer and a reducing agent; (11) adding Ag-mordenite into the mixture obtained in the step (10); and (12) carrying out suction filtration on the mixture obtained in the step (11), and drying the filter cake at 110 DEG C for 24 hours.
Description
technical field [0001] The invention belongs to the technical field of adsorbent preparation, in particular to an adsorbent material for capturing radioactive element iodine. Background technique [0002] Radioactive iodine is one of the very important nuclides in the wastewater of nuclear facilities in normal operation and accident state. Although the causes of the four major nuclear accidents in human history are different, the radionuclide iodine is the common pollutant of these four accidents. Because radioactive iodine has the properties of radiation hazard, chemical toxicity and high mobility, it has great harm to organisms and the environment, so it must be enriched. In addition, the wide application of radioactive iodine in the fields of military, medicine, industry and agriculture, and scientific research further increases the risk of water bodies being polluted by radioactive iodine nuclides. [0003] The treatment of radioactive wastewater is essentially to make...
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