Preparation method of <131>I<-> high-efficiency adsorbent in nuclear wastewater

A technology for nuclear wastewater and adsorbents, applied in chemical instruments and methods, nuclear engineering, other chemical processes, etc., can solve the problems of complex and expensive means, and achieve the effects of wide sources, low cost and simple preparation process
CN103170301AInactive Publication Date: 2013-06-26QINGDAO UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QINGDAO UNIV
Publication Date
2013-06-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method of a <131>I<-> high-efficiency adsorbent in nuclear wastewater, which comprises the following steps: synthesizing sodium titanate nanotubes and nano fibers by a hydrothermal process, and doping and curing nano silver oxide particles to obtain the high-efficiency adsorbent. The high-efficiency adsorbent can quickly and efficiently adsorb and filter nuclear pollution wastewater, can be used for avoiding diffusion of radioactive substance <131>I<-> and other radioiodine isotopes, and is widely used for nuclear accident emergency, nuclear facility shielding and medical radioactive wastewater treatment.1g of the novel adsorbent can be used for filtering and purifying 1 ton of radioactive wastewater; and the adsorbent can completely absorb and fix the radioactive substance <131>I<-> in the nuclear wastewater with the radioactive <131>I<-> content of lower than 200 ppm, and thus, is a high-efficiency adsorbing material with directional selectivity.
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Description

technical field

[0001] The present invention relates to an Ag 2 Preparation method of O-doped nano titanate adsorbent, especially in radioactive waste water 131 I - Preparation method of high-efficiency adsorbent. Background technique

[0002] The heat source of nuclear power plants is mainly uranium-235 ( 235 U), when a 235 When the nucleus of U is bombarded by external neutrons, it splits into two nuclei with smaller masses and releases 2 to 3 neutrons at the same time. These neutrons go on to bombard other 235 U atomic nuclei, thus the continuous chain fission reaction can release huge energy. 235 U fission produces more than 300 kinds of nuclide products, which are mainly distributed in the peak range of mass number 90-95, 130-140. After removing a large number of nuclides with low yield or short half-life, the main fission product obtained is iodine-131( 131 I), cesium-137 ( 137 Cs), strontium-90 ( 90 Sr) and so on. 131 I will undergo beta decay, emitting beta...

Claims

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