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

A kind of adsorption filter element and filter element technology, which is 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: 2013-10-23
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

The invention discloses a preparation method of a filter core capable of fast and efficiently adsorbing caesium. The preparation method comprises the following steps of based on the weight of a substrate material, adding 1-3wt% of a coupling agent and 1-10wt% of ammonium phosphomolybdate into the substrate material, heating them to a temperature of 160-220 DEG C, uniformly stirring so that the substrate material is coupled with ammonium phosphomolybdate, carrying out filament spraying by micropores of 5 microns, wherein the sprayed filaments form an adsorption filter core having the thickness of 5-50mm on a revolving cylindrical framework material, uniformly coating ammonium phosphomolybdate on an outer surface of the adsorption filter core, and carrying out heating stable-aging at a temperature of 80-120 DEG C for 3-12h. The filter core has good water permeability and oxidation resistance, can be immersed in hot water at a temperature of below 100 DEG C for a long time, can resist irradiation decomposition, has stable adsorption performances, a fast detection rate, high efficiency and high precision, and can determine an adsorption rate without stable cesium measurement.

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 Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/32C02F1/28
CPCB01J20/28038D01D5/0985D01F1/10D01F6/06B01J20/261B01J20/321B01J20/3236B01J20/3293C02F1/288C02F2101/006B01J20/0218B01J20/0274B05D3/0254C08K2003/322D01D5/08
Inventor 董振芳石红旗马德毅
Owner THE FIRST INST OF OCEANOGRAPHY SOA
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