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Inorganic material for treating waste water containing cesium, strontium and cobalt and preparation method thereof

A technology of inorganic materials and wastewater, applied in chemical instruments and methods, other chemical processes, nuclear engineering and other directions, can solve problems such as affecting the curing effect, and achieve the effects of easy solid-liquid separation, high radiation stability, and high selectivity

Active Publication Date: 2018-09-28
CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this kind of adsorbent contains polyacrylonitrile, and the material after treating radioactive wastewater needs further solidification, and the system contains polyacrylonitrile, which will affect the curing effect

Method used

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  • Inorganic material for treating waste water containing cesium, strontium and cobalt and preparation method thereof
  • Inorganic material for treating waste water containing cesium, strontium and cobalt and preparation method thereof
  • Inorganic material for treating waste water containing cesium, strontium and cobalt and preparation method thereof

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preparation example Construction

[0029] In addition, the present invention also proposes a method for preparing an inorganic composite adsorbent for treating trace amounts of cesium, strontium, and cobalt ions in nuclear power plant radioactive waste water, the steps are as follows:

[0030] a. Mix potassium pyrophosphate solution with a concentration of 0.1-1.0mol / L with sodium metavanadate or sodium silicate solution or sodium molybdate solution with a concentration of 0.1-1.0mol / L in a certain proportion, and the mixing process is continuous carried out with stirring;

[0031] b. Use hydrochloric acid to adjust the pH value of the reaction solution to 1-4 with hydrochloric acid, then slowly add 0.1-1.0 mol / L zirconium oxychloride solution dropwise to form a precipitate, and stir fully at the same time to complete the reaction . When the precipitate is no longer formed, use acid or alkali to adjust the pH value of the mixture to a constant value, and after standing for 6 to 12 hours, carry out suction filt...

Embodiment 1

[0035]Specifically, in this embodiment, 0.5 mol / L potassium pyrophosphate solution can be mixed with 0.5 mol / L sodium metavanadate acid solution at a molar ratio of 5:1 under continuous stirring. And use 10% hydrochloric acid to adjust the pH value of the reaction solution to an acidic value of 3.0, slowly add 1.0mol / L zirconium oxychloride solution dropwise with a separatory funnel to generate a precipitate, the molar ratio of zirconium oxychloride to sodium metavanadate is 1 : 1, while fully stirring to complete the reaction. When the precipitate is no longer formed, the pH value of the solution is adjusted to 1.0 with acid or alkali, and after standing for 6 hours, suction filtration is performed until the filtrate is close to neutral. Then it was washed with deionized water until neutral, dried at 40°C and ground into powder to obtain zirconium pyrophosphovanadate.

[0036] Then, the prepared zirconium pyrophosphovanadate is mixed with 60% by mass fraction and 0.15 mol / L ...

Embodiment 2

[0039] Specifically, in this embodiment, 0.1 mol / L potassium pyrophosphate solution may be mixed with 1 mol / L sodium metavanadate acid solution at a molar ratio of 10:1 under continuous stirring. And use 10% hydrochloric acid to adjust the pH value of the reaction solution to an acidic value of 4.0, slowly add 1.0mol / L zirconium oxychloride solution dropwise with a separatory funnel to generate a precipitate, the molar ratio of zirconium oxychloride to sodium metavanadate is 1 : 1, while fully stirring to complete the reaction. When the precipitate is no longer formed, the pH value of the solution is adjusted to 1.0 with acid or alkali, and after standing for 12 hours, suction filtration is performed until the filtrate is close to neutral. Then it was washed with deionized water until neutral, dried at 60° C. and ground into powder to obtain zirconium pyrophosphovanadate.

[0040] Then, the prepared zirconium pyrophosphovanadate is mixed with 60% by mass fraction and 0.2mol / L...

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Abstract

The invention discloses an inorganic material for treating waste water with cesium, strontium and cobalt and a preparation method of the inorganic material. The inorganic material is inorganic composite adsorbent which is prepared by compounding titanic oxide and inorganic heteropolyacid salt. The titanic oxide is titanium dioxide, the inorganic heteropolyacid salt is phosphorus containing heteropolyacid salt, and the mass fraction of phosphorus containing heteropolyacid salt ranges from 60% to 70%. The adsorbent formed by the inorganic material cannot influence the loading capacity of cement to the adsorbent, the wrapping effect cannot be influenced, and the leaching efficiency of radionuclide in a solidified body can be lowered, and the strength of a cement solidification body can be improved.

Description

technical field [0001] The invention relates to the field of nuclear power generation technology and radioactive waste water treatment, in particular to an inorganic material for treating waste water containing cesium, strontium and cobalt and a preparation method thereof. Background technique [0002] As a safe and efficient clean energy, nuclear power is one of the most important choices for my country to tackle climate change, increase energy supply, and optimize energy structure. The safety of nuclear power plants has become a major problem in the large-scale development of nuclear energy, especially the safe treatment and disposal of nuclear waste has become a key issue in the development of nuclear energy. Radioactive wastewater is an inevitable nuclear waste during the operation, maintenance, and decommissioning of nuclear power plants. Therefore, proper treatment of radioactive wastewater is of great significance to the control of the total amount of nuclear and radi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/30G21F9/12
Inventor 李元林建中汤东升何小华左萌郜瑞莹
Owner CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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