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Adsorption material enriching radioactive iodine in seawater and preparation method of adsorption material

An adsorption material and radioactive iodine technology, which is applied in the field of rapid enrichment technology for key nuclides in nuclear polluted seawater environment, can solve problems such as difficulty in meeting emergency monitoring of marine nuclear leakage accidents, and achieve the improvement of marine environmental radioactive monitoring capabilities, production Simple, easy-to-prepare effects

Inactive Publication Date: 2019-04-05
EAST CHINA NORMAL UNIV
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Problems solved by technology

Due to the time-consuming process of enrichment and separation, the existing analysis technology cannot meet the needs of emergency monitoring of marine nuclear leakage accidents. At this stage, it is urgent to solve the technical bottleneck in the process of sample enrichment and concentration.

Method used

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  • Adsorption material enriching radioactive iodine in seawater and preparation method of adsorption material
  • Adsorption material enriching radioactive iodine in seawater and preparation method of adsorption material
  • Adsorption material enriching radioactive iodine in seawater and preparation method of adsorption material

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Embodiment

[0032] Prepare 4 adsorption materials of the present invention, that is, CuFC / AgFC enrichment columns, respectively select the seawater near the coast of Daishan, Zhejiang (salinity: 28.7), the seawater of the East China Sea (salinity: 30.9), the seawater near the coast of Xiamen, Fujian (salinity: 32), South China Sea seawater (salinity: 34.9) was used for field application experiments. The volume of seawater is 100L, and the flow rate is 6.2L min -1 , the single adsorption and multiple adsorption experiments were carried out respectively, and the efficiency is shown in Figure 5 shown. It was found that the adsorption efficiency was similar to the results of the indoor simulation experiment. The single adsorption efficiency was about 50%-60%, the five-cycle adsorption efficiency was about 65%-80%, and the eight-cycle adsorption efficiency was about 100%. The results are close to the results of indoor simulation experiments, indicating that the adsorption material, CuFC / AgF...

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Abstract

The invention discloses an adsorption material enriching radioactive iodine in seawater and a preparation method of the adsorption material. An adsorbent of the adsorption material is CuFC / AgFC, and aloading body is a polypropylene fiber filter element. The adsorption material is simple and convenient to make and low in cost, can rapidly enrich the radioactive iodine in the seawater within a short time and can be applied to large-sized surface and small-sized middle (bottom) seawater samples. The efficiency of a single-time method is 55%, and the efficiency of an eight-time cyclic adsorptionmethod is 100%. The analysis time of the adsorption material applied to enrichment of the radioactive iodine in the seawater samples is shortened to 25-30 hours, and detection limit is reduced to be 0.4-1.2Bq*m<-3>. Besides, the adsorption material can jointly enrich 134 and 137Cs in the seawater, can be applied to joint emergency monitoring of radioactive sites in the seawater, is beneficial to improvement of existing marine environment radioactivity monitoring capacity and provides technical support for marine radioactivity supervision.

Description

technical field [0001] The invention relates to an adsorption material and a preparation method, in particular to an adsorption material for enriching radioactive iodine in seawater, in particular to a rapid enrichment technology for key nuclides in nuclear-polluted seawater environments in nuclear safety and emergency systems. Background technique [0002] Radioactive iodine is a representative nuclide for nuclear pollution detection at home and abroad, and it is also a decisive nuclide for rapid evaluation of nuclear pollution levels. The traditional enrichment methods for analyzing radioactive iodine in seawater mainly include chemical extraction, ion exchange, and adsorption. Among them, the chemical extraction method is complicated and time-consuming; the ion exchange method is convenient to operate, but the cost is high, the adsorption capacity is low, and the processing time is lengthy. Relatively speaking, the adsorption method is a method that can achieve rapid det...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/12C02F103/08C02F101/10
CPCB01J20/02B01J20/261C02F1/281C02F1/285C02F2101/006C02F2101/10C02F2101/12C02F2103/08
Inventor 毕倩倩杜金洲俞怡
Owner EAST CHINA NORMAL UNIV
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