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A method for removing cesium ions based on bentonite-chitosan composite microspheres

A technology of composite microspheres and chitosan, which is applied in chemical instruments and methods, alkali metal compounds, and other chemical processes, can solve the problems of untargeted removal of pollutants, lengthy steps of removal methods, and difficulties in solid-liquid separation. It achieves the effect of wide application range of pH, low requirements for adsorption conditions, and environmental friendliness

Active Publication Date: 2022-06-24
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The existing technologies represented by the above-mentioned patent documents all have the defects of lengthy removal method steps, high cost, high energy consumption, difficult solid-liquid separation and untargeted removal of pollutants.

Method used

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  • A method for removing cesium ions based on bentonite-chitosan composite microspheres
  • A method for removing cesium ions based on bentonite-chitosan composite microspheres
  • A method for removing cesium ions based on bentonite-chitosan composite microspheres

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Embodiment 1

[0040] The invention discloses a method for removing cesium ions based on bentonite-chitosan composite microspheres. The magnetic porous bentonite-chitosan composite microspheres are added into wastewater containing radionuclide cesium ions, and then shaken at constant temperature.

[0041] The mass of the magnetic porous bentonite-chitosan composite microsphere is 0.1 g, the cesium ion in the waste water is cesium-133, the concentration is 50 mg / L, and the pH value range of the waste water is 3.5.

[0042] The temperature of the constant temperature is 24°C, and the oscillation frequency is 120r / min.

[0043] The shock adsorption time was 12h.

[0044] "The magnetic porous bentonite-chitosan composite microspheres are added to the wastewater containing radionuclide cesium ions, and then shaken at constant temperature", which has excellent adsorption performance for cesium ions, large adsorption capacity, and the maximum equilibrium adsorption capacity is 57.084mg / g ; Low req...

Embodiment 2

[0046] The invention discloses a method for removing cesium ions based on bentonite-chitosan composite microspheres. The magnetic porous bentonite-chitosan composite microspheres are added into wastewater containing radionuclide cesium ions, and then shaken at constant temperature.

[0047] The mass of the magnetic porous bentonite-chitosan composite microsphere is 0.1 g, the cesium ion in the waste water is cesium-133, the concentration is 100 mg / L, and the pH value of the waste water is in the range of 5.

[0048] The temperature of the constant temperature is 25°C, and the oscillation frequency is 120r / min.

[0049] The shock adsorption time was 15h.

Embodiment 3

[0051] The invention discloses a method for removing cesium ions based on bentonite-chitosan composite microspheres. The magnetic porous bentonite-chitosan composite microspheres are added into wastewater containing radionuclide cesium ions, and then shaken at constant temperature.

[0052] The mass of the magnetic porous bentonite-chitosan composite microsphere is 0.1 g, the cesium ion in the waste water is cesium-133, the concentration is 150 mg / L, and the pH value of the waste water is in the range of 7.

[0053] The temperature of the constant temperature is 26°C, and the oscillation frequency is 120r / min.

[0054] The shock adsorption time was 18h.

[0055] The cesium ion is cesium-133.

[0056] The magnetic porous bentonite-chitosan composite microspheres are prepared by dissolving bentonite in an acetic acid solution, fully mixing with mechanical stirring, adding chitosan, and then adding Fe. 3+ / Fe 2+ obtain a mixed solution; prepare a mixed solution of sodium citra...

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Abstract

The invention discloses a method for removing cesium ions based on bentonite-chitosan composite microspheres, which is characterized in that: adding magnetic porous bentonite-chitosan composite microspheres into waste water containing radionuclide cesium ions, and then shaking at a constant temperature. The invention has excellent adsorption performance for cesium ions, large adsorption capacity, insensitive to pH, strong anti-interference ability for coexisting ions, wide application range, and can be recovered by magnetic field after wastewater treatment, simple solid-liquid separation, and environment-friendly; The entire removal method has simple steps, and low cost and energy consumption.

Description

technical field [0001] The invention relates to the technical field of radioactive wastewater treatment and environmental protection, in particular to a method for removing cesium ions based on bentonite-chitosan composite microspheres. Background technique [0002] At present, cesium ions are widely used in the nuclear industry, and radioactive cesium ions, as the product of uranium nuclear fission, appear in large numbers in nuclear sewage. In 2011, the Fukushima nuclear power plant in Japan exploded, causing the leakage of radioactive materials and the discharge of a large amount of waste water containing radioactive cesium. At present, nuclear energy is used more and more widely as a new type of energy, and the treatment of radioactive wastewater has become a major environmental problem facing the world today. Cesium ions have the characteristics of high toxicity, long half-life, easy deposition in the human body and refractory degradation. [0003] In order to reduce ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21F9/12B01J20/24B01J20/28
CPCB01J20/24G21F9/12B01J20/28021
Inventor 蒲生彦颜椿王可心马慧余静黄虹雁
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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