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Preparation method of filter core capable of fast and efficiently adsorbing caesium

An adsorption filter element, high-efficiency technology, applied in the field of adsorption materials for radioactive substances, can solve the problems of low efficiency and slow material speed, and achieve the effect of stable adsorption performance and good water permeability

Active Publication Date: 2015-03-25
THE FIRST INST OF OCEANOGRAPHY SOA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In conclusion, existing materials for adsorbing cesium (Cs) are slow and inefficient

Method used

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  • Preparation method of filter core capable of fast and efficiently adsorbing caesium
  • Preparation method of filter core capable of fast and efficiently adsorbing caesium
  • Preparation method of filter core capable of fast and efficiently adsorbing caesium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation method of the fast and highly efficient filter element for absorbing cesium, the specific preparation method is as follows:

[0038] 1) Modification of substrate material:

[0039] Add 1% by weight of methyl methacrylate and 1% of AMP (Ammonium Phosphomolybdate Trihydrate, ammonium phosphomolybdate) to the substrate material PP (polypropylene resin), heat to 160 ° C, stir and mix, so that PP is combined with AMP.

[0040] 2) Meltblown filter element:

[0041] The material prepared in step 1) is spun through 5 μm micropores, and the spun filaments are wound on the rotating cylindrical skeleton material to form an adsorption filter element with a thickness of 5 mm. The skeleton material is a hollow polypropylene melt-blown tube , the nominal particle size is 5μm.

[0042] 3) Coating of the filter element:

[0043] AMP is evenly coated on the outer surface of the adsorption filter element prepared in step 2), and the specific steps of coating are: disso...

Embodiment 2

[0047] The preparation method of the fast and highly efficient filter element for absorbing cesium, the specific preparation method is as follows:

[0048] 1) Modification of substrate material:

[0049] Add 3% styrene and 10% AMP to the substrate material PES (polyether sulfone resin, Poly ether sulfones), heat to 220 ° C, stir and mix, so that PES and AMP are combined;

[0050] 2) Meltblown filter element:

[0051] The material prepared in step 1) is spun through micropores of 5 μm, and the spun filaments are wound on a rotating cylindrical skeleton material to form an adsorption filter element with a thickness of 50 mm. The skeleton material is a hollow polypropylene melt Nozzle, the nominal particle size is 5μm.

[0052] 3) Coating of the filter element:

[0053] AMP is evenly coated on the surface of the adsorption filter element prepared in step 2), and the specific steps of coating are: dissolving AMP in ammonia water with a concentration of 0.5mol / L, wherein the mass ...

Embodiment 3

[0057] The preparation method of the fast and highly efficient filter element for absorbing cesium, the specific preparation method is as follows:

[0058] 1) Modification of substrate material:

[0059] Add 2% methyl methacrylate and 5% AMP to the substrate material: PP by weight, heat to 190°C, stir and mix well to combine PP and AMP;

[0060] 2) Meltblown filter element:

[0061] The material prepared in step 1) is spun through 5 μm micropores, and the spun filaments are wound on the rotating cylindrical skeleton material to form an adsorption filter element with a thickness of 30 mm. The skeleton material is a hollow polypropylene melt Nozzle, nominal particle size 5μm;

[0062] 3) Coating of the filter element:

[0063] On the surface of the adsorption filter element prepared in step 2), the specific steps of coating are: dissolving AMP in ammonia water with a concentration of 0.5mol / L, wherein the mass percentage concentration of AMP is 5%, and then , at 55°C, pH=3, ...

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Abstract

A preparation method of filter element for swift and highly efficient adsorption of Cs includes the following steps: to a substrate material, adding a coupling agent with 1-3 wt % and ammonium phosphomolybdate with 1-10 wt %, based on the weight of the substrate material; heating to 160˜220° C.; stirring and mixing evenly so that the substrate material is combined with ammonium phosphomolybdate; spining through 5 μm micropore, the spun filament forming adsorbent filter element with a thickness of 5-50 mm in the rotational cylinder framework material; evenly coating ammonium phosphomolybdate on the outer surface of the adsorbent filter element; and stabilizing and implementing an aging process by heating to 80-120° C. for 3-12 h. The filter element prepared by this method provides an excellent water permeability, oxidization resistance, long-term immersion in hot water of below 100° C., radiation decomposition resistance, stable adsorption, swift detection, high efficiency and precision.

Description

technical field [0001] The invention relates to the field of materials for adsorbing radioactive substances, in particular to a method for preparing a fast and efficient cesium-adsorbing filter element. Background technique [0002] At present, the materials for adsorbing cesium (Cs) mainly include AMP-PAN resin, CuFeCN resin, natural minerals, etc., which are characterized by slow adsorption, long equilibration time, and low adsorption efficiency. For environmental monitoring, adsorption rate detection and treatment are required. It takes about 10 hours for a sample, and the volume of the water sample for adsorption treatment is at the level of tens of liters. [0003] The research materials used for the concentration and adsorption of Cs in nuclear wastewater include AMP, CuFeCN, zeolite, kaolin, diatomaceous earth, iron ore, etc. The common characteristics of these materials are time-consuming, small adsorption capacity, and adsorption rate between 40 and 95 %between. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/32C02F1/28
CPCD01D5/08B01J20/28038D01D5/0985D01F1/10D01F6/06B01J20/261B01J20/321B01J20/3236B01J20/3293C02F1/288C02F2101/006B01J20/0218B01J20/0274B05D3/0254C08K2003/322
Inventor 董振芳石红旗马德毅
Owner THE FIRST INST OF OCEANOGRAPHY SOA
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