Amorphous antimony oxide for adsorbing radioactive strontium-90 and cobalt-60 and preparation method of amorphous antimony oxide

An antimony oxide and radioactive strontium technology is applied in the field of amorphous antimony oxide and its preparation, which can solve the problems of small adsorption capacity, short service life and poor effect, and achieve the effects of simple steps, low cost and many pores.

Pending Publication Date: 2019-04-16
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem that existing organic ion exchangers have poor effect and short service life when used to treat low-concentration nuclear radioactive wastewater, and the antimony pentoxide adsorbent prepared by th...

Method used

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  • Amorphous antimony oxide for adsorbing radioactive strontium-90 and cobalt-60 and preparation method of amorphous antimony oxide
  • Amorphous antimony oxide for adsorbing radioactive strontium-90 and cobalt-60 and preparation method of amorphous antimony oxide
  • Amorphous antimony oxide for adsorbing radioactive strontium-90 and cobalt-60 and preparation method of amorphous antimony oxide

Examples

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Embodiment 1～5

[0043] A method for preparing amorphous antimony oxides for absorbing radioactive strontium-90 and cobalt-60, the method comprising the following steps:

[0044] 1) taking antimony trichloride and hydrochloric acid as raw materials, weighing and mixing to obtain a mixed solution;

[0045] 2) Place the mixed solution in a water bath, add hydrogen peroxide to oxidize for 1 hour, then mix the oxidized mixed solution with a large amount of water for hydrolysis, filter and separate the hydrolyzate after hydrolysis, and use it to adsorb radioactive strontium-90 and Amorphous antimony oxide of cobalt-60.

[0046] The specific preparation parameters of Examples 1-5 are shown in Table 1.

[0047] Table 1 preparation process parameters

[0048]

[0049] The amorphous antimony oxides prepared in Examples 1-5 were detected. After testing, the average particle diameters of Examples 1-5 are all in the range of 60-150nm, and the specific surface area of ​​the prepared amorphous antimon...

Embodiment 6～10

[0051] The preparation steps of Examples 6-10 respectively correspond to Examples 1-5 in turn, only hydrogen peroxide is replaced by chlorine gas and added. The volume ratio of chlorine used in Example 6 to the mixed solution is 50:1, and the speed of feeding chlorine is 50mL / min; the volume ratio of chlorine used in Example 7 to the mixed solution is 80:1, and the speed of feeding chlorine is 100mL / min. min; the volume ratio of chlorine gas used in embodiment 8 and mixed solution is 80:1, and the speed of feeding chlorine gas is 120mL / min; the volume ratio of chlorine gas used in embodiment 9 and mixed solution is 100:1, and the speed of feeding chlorine gas is 100:1. 150mL / min; the volume ratio of chlorine gas to the mixed solution used in Example 10 was 100:1, and the rate of introducing chlorine gas was 200mL / min.

[0052] The amorphous antimony oxides prepared in Examples 6-10 were detected. After testing, the average particle diameters of Examples 6-10 are all in the ra...

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Abstract

The invention relates to the field of radioactive element wastewater treatment, and provides an amorphous antimony oxide for adsorbing radioactive Sr-90 and Co-60 and a preparation method of the amorphous antimony oxide in order to solve the problems that an existing organic ion exchange agent has a poor effect and shorter service life when being used for treating low-concentration nuclear radioactive wastewater, and an antimony pentoxide adsorbent prepared in the prior art has the smaller adsorption capacity for Sr-90. The preparation method comprises the following steps that 1) antimony butter and hydrochloric acid are taken as raw materials, weighed and mixed to obtain a mixed solution; 2) the mixed solution is oxidized in a water bath condition and then is mixed and hydrolyzed with a large amount of water, filtering separation is carried out to obtain a hydrolysis product, and the amorphous antimony oxide for adsorbing the radioactive Sr-90 and Co-60 is obtained after drying. The amorphous antimony oxide for adsorbing the radioactive Sr-90 and Co-60 and the preparation method of the amorphous antimony oxide have the advantages that the preparation method is concise and efficient, and a part of raw materials can be recycled; the prepared amorphous antimony oxide has huge specific surface area and a disordered structure, and has a very strong adsorbing effect on Sr-90, Co-60and other radioactive isotopes.

Description

technical field [0001] The invention relates to the field of radioactive element waste water treatment, in particular to an amorphous antimony oxide for adsorbing radioactive strontium-90 and cobalt-60 and a preparation method thereof. Background technique [0002] The rapid development of nuclear energy in China, especially the construction of nuclear power plants in recent years, will inevitably lead to the generation of a large amount of low-radioactive wastewater. In order to prevent these radioactive elements from entering the water cycle of the ecological environment and causing irreversible poisoning to organisms, we must remove the radioactive elements in these low-level radioactive wastewaters before they are discharged. The main pollutants in low-level radioactive wastewater are radioactive isotopes strontium-90 and cobalt-60. And because the two radioactive isotopes, Sr-90 and Co-60, have a longer half-life and high solubility, they are more harmful. Currently, ...

Claims

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Application Information

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IPC IPC(8): B01J20/02B01J20/28B01J20/30G21F9/12
CPCB01J20/0259B01J20/28057G21F9/12
Inventor 张惠斌余坦纳郑国渠曹华珍
Owner ZHEJIANG UNIV OF TECH
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