Large-scale preparation method of high-stability caesium removing adsorbent, product of preparation method and application of product

An adsorbent and stable technology, applied in the field of large-scale preparation of adsorbents for removing cesium, can solve the problems of slow adsorption speed, easy pulverization, increased water turbidity and electrical conductivity, etc., to reduce emissions, reduce dosage, and achieve good adsorption. performance effect

Pending Publication Date: 2018-06-15
TSINGHUA UNIV
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  • Abstract
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Problems solved by technology

At present, the inorganic adsorbent used in the design of AP1000 is zeolite, which has the phenomenon of slo

Method used

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  • Large-scale preparation method of high-stability caesium removing adsorbent, product of preparation method and application of product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1: Preparation of silica gel-loaded adsorbent and cesium removal performance

[0049] Preferably go out the higher silica gel Si-1 of mechanical strength, particle size is 0.5-2.0mm, prepare copper ferrocyanide potassium adsorbent on it, the steps are as follows:

[0050] (1) Loading of copper salt: first add pure water to No. 1 reactor and heat it to 80-100°C, add copper sulfate to it to dissolve to form a solution with a concentration of 10-50%; secondly, in the reactor Add silica gel particles Si-1 as a carrier, impregnate for 2-48 hours, and then separate the solid and liquid phases and dry to obtain the precursor Si-1-A loaded with copper sulfate.

[0051] (2) Preparation of transition metal-stabilized ferrocyanide adsorbent: first, add pure water to No. 2 reactor and heat it to 80-100°C, add sodium ferrocyanide to it, dissolve it and form a concentration of 10 -50% solution; secondly, the precursor Si-1-A loaded with copper sulfate obtained in step (1) is...

Embodiment 2

[0056] Example 2: Preparation of alumina-supported adsorbent and cesium removal performance

[0057] Preferably go out the aluminum oxide pellet Al-1 that mechanical strength is higher, particle size is 0.5-2.0mm, prepare zinc ferrocyanide potassium adsorbent on it, the steps are as follows:

[0058] (1) Loading of ferrocyanide: first, add pure water to No. 1 reactor and heat it to 80-100°C, add potassium ferrocyanide to it, and dissolve it to form a solution with a concentration of 10-50%; Next, add alumina pellets Al-1 into the reaction kettle as a carrier, impregnate for 2-48 hours, and then perform solid-liquid phase separation and dry in a constant temperature oven to obtain the precursor Al-1-A loaded with ferrocyanide.

[0059] (2) Preparation of transition metal-stabilized ferrocyanide adsorbent: first add pure water to No. 2 reactor and heat it to 80-100°C, then add zinc acetate to dissolve it and form a concentration of 10-50% solution; secondly, the ferrocyanide-lo...

Embodiment 3

[0065] Example 3: Preparation and performance of titanium oxide supported adsorbent

[0066] Preferably go out the titanium oxide pellet Ti-1 that mechanical strength is higher, particle size is 0.5-2.0mm, prepare cobalt potassium ferrocyanide adsorbent thereon, step is as follows:

[0067] (1) Loading of ferrocyanide: first, add pure water to No. 1 reactor and heat it to 80-100°C, add potassium ferrocyanide to it, and dissolve it to form a solution with a concentration of 10-50%; Next, titanium oxide pellets Ti-1 are added into the reaction kettle as a carrier, impregnated for 2-48 hours, and then solid-liquid phase separation is performed and dried in a constant temperature oven to obtain the precursor Ti-1-A loaded with ferrocyanide.

[0068] (2) Preparation of transition metal-stabilized ferrocyanide adsorbent: first add pure water to No. 2 reactor and heat it to 80-100°C, add cobalt nitrate to it, dissolve it and form a concentration of 10-50% Next, the precursor Ti-1-A ...

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Abstract

The invention relates to a large-scale preparation method of high stability caesium removing adsorbent, a product of the preparation method and application of the product, in particular to transitionmetal-stabilized ferrocyanide adsorbent supported by particulate inorganic oxide or activated carbon. The transition metal-stabilized ferrocyanide adsorbent comprises a particulate inorganic oxide carrier or a particulate activated carbon carrier, a transition metal-stabilized ferrocyanide layer which coats the inorganic oxide carrier or activated carbon carrier and a polymer material layer coating the transition metal-stabilized ferrocyanide layer. The adsorbent has high crushing strength and a low ion leaching rate. The invention also relates to the preparation method of the adsorbent and the application of the adsorbent in removal of radioisotope Cs ions, stable-isotope Cs ions, radioisotope Rb ions and stable-isotopic Rb ions.

Description

technical field [0001] The invention relates to the field of inorganic materials, in particular to a large-scale preparation method of a highly stable cesium-removing adsorbent and its product and application. The adsorbent also has good adsorption performance for rubidium. Background technique [0002] According to China's medium and long-term nuclear power development plan goals, by 2020, the installed capacity of operating nuclear power in mainland China will reach 58 million kilowatts, and about 30 million kilowatts are under construction; by 2030, the goal of building a powerful nuclear power country will be fully realized. Facing the new situation and challenges of nuclear energy development, China urgently needs to vigorously develop radioactive waste treatment, nuclear emergency technology, and radioactive effluent discharge standards. [0003] The efficient and timely treatment of radioactive liquids is one of the important issues to be solved urgently in the establ...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/26B01J20/30C02F1/28G21F9/12
CPCB01J20/0259B01J20/06B01J20/20B01J20/24G21F9/12C02F1/281C02F1/283C02F1/285B01J20/261B01J20/262C02F2101/006B01J2220/4812B01J2220/46B01J2220/4806C02F1/288B01J20/0274B01J20/0229B01J20/2803B01J20/04B01J20/3204B01J20/3236Y02P10/20
Inventor 赵璇尉继英李福志
Owner TSINGHUA UNIV
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