Method for preparing supported ferrocyanide bacterial cellulose membrane for adsorbing Cs+

A technology of bacterial cellulose membrane and ferrocyanide, which is applied in chemical instruments and methods, adsorbed water/sewage treatment, radioactive pollutants, etc., can solve the problem of the preparation method and application of bacterial cellulose membrane-loaded ferrocyanide. related reports and other issues, to achieve the effect of easy utilization and separation, mild conditions, and simple operation

Inactive Publication Date: 2018-06-15
TSINGHUA UNIV
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Problems solved by technology

[0006] Through the search of inventions at home and abroad, no relevant reports on the prepa...

Method used

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  • Method for preparing supported ferrocyanide bacterial cellulose membrane for adsorbing Cs+

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Embodiment 1

[0023] Cut the bacterial cellulose membrane (thickness is about 1mm) into a circle with a diameter of about 3cm, soak it in a sodium hydroxide solution with a mass concentration of 1% at 60°C for 12h, and then wash the activated membrane with deionized water Bacterial cellulose membrane. Take the above bacterial cellulose membrane, respectively, with FeCl 3 Solution (0.5mol / L, 100mL) and potassium ferrocyanide solution (0.5mol / L, 100mL) were soaked for two hours, shaken with a shaker at a vibration rate of 100r / min, and washed twice with deionized water. The bacterial cellulose membrane-loaded ferrocyanide composite material is obtained.

Embodiment 2

[0025] Cut the bacterial cellulose membrane (thickness is about 1mm) into a circle with a diameter of about 3cm, soak it in a sodium hydroxide solution with a mass concentration of 1% at 60°C for 12h, and then wash the activated membrane with deionized water Bacterial cellulose membrane. Take the above-mentioned bacterial cellulose membrane, followed by CuSO 4 Solution (0.5mol / L, 100mL) and potassium ferrocyanide solution (0.5mol / L, 100mL) were soaked for two hours, shaken with a shaker at a vibration rate of 100r / min, and washed twice with deionized water. The bacterial cellulose membrane-supported copper ferrocyanide composite material was obtained.

Embodiment 3

[0027] Cut the bacterial cellulose membrane (thickness is about 1mm) into a circle with a diameter of about 3cm, soak it in a sodium hydroxide solution with a mass concentration of 1% at 60°C for 12h, and then wash the activated membrane with deionized water Bacterial cellulose membrane. Take the bacterial cellulose membrane above, and then use CoCl 2 Solution (0.5mol / L, 100mL) and potassium ferrocyanide solution (0.5mol / L, 100mL) were soaked for two hours, shaken with a shaker at a vibration rate of 100r / min, and washed twice with deionized water. The bacterial cellulose membrane-supported cobalt ferrocyanide composite material is obtained.

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Abstract

The invention discloses a method for preparing a supported ferrocyanide bacterial cellulose membrane for adsorbing Cs+. The method is characterized by comprising the following steps: 1) pretreating abacterial cellulose membrane, and cutting the bacterial cellulose membrane into different sizes; 2) adsorbing transition metallic ions by using the bacterial cellulose membrane, soaking the bacterialcellulose membrane obtained in the step 1) into a transition metallic ion solution, and washing the surface of the bacterial cellulose membrane with distilled water; 3) supporting ferrocyanide on thebacterial cellulose membrane, soaking the bacterial cellulose membrane obtained in the step 2) into a potassium ferrocyanide solution, performing oscillation by using a table concentrator, and washingthe surface of the bacterial cellulose membrane with distilled water. The material prepared by using the method can be cut into different sizes according to demands, a ferrocyanide crystal is deeplyembedded into a fiber structure, and after treatment, the ferrocyanide is not liable to lose in the wastewater treatment process; the material has a relatively good adsorption property for radionuclide cesium ion, and meanwhile the problem that a bed layer has too large water resistance when the ferrocyanide is used independently is avoided.

Description

technical field [0001] The invention belongs to the technical field of material preparation and radioactive wastewater treatment, in particular to a method for adsorbing Cs + Preparation method of ferrocyanide-loaded bacterial cellulose membrane. Background technique [0002] Some radioactive ions (such as 137 Cs, 60 Co etc.) waste water. in 137 Cs has a relatively long half-life and can decay to emit strong γ-rays, which can easily induce gene mutations. In addition its with K + Similar chemical properties, high solubility, easy to migrate to the biosphere through groundwater. Therefore, the handling and disposal of radionuclide cesium is particularly important. [0003] At present, the common treatment methods of radionuclide cesium include: membrane separation method, precipitation method, solvent extraction method, adsorption method or ion exchange method. Membrane separation method is to use selectively permeable membranes to achieve selective separation of cesi...

Claims

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Application Information

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IPC IPC(8): C02F1/28C08J7/06C08J5/18C08L1/02
CPCC02F1/281C02F2101/006C08J5/18C08J7/06C08J2301/02
Inventor 王建龙庄淑婷
Owner TSINGHUA UNIV
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