Preparation method of dictyophora-loaded vulcanized nano zero-valent iron and application

A nano-zero-valent iron and bamboo fungus technology, which is applied in chemical instruments and methods, radioactive purification, and other chemical processes, can solve obstacles to practical applications, reduce the removal effect of radionuclides, and reduce the active sites of nano-zero-valent iron and other problems, to achieve the effect of improving removal efficiency and adsorption capacity, easy to popularize, and fast adsorption rate

Inactive Publication Date: 2019-05-31
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a large number of studies have found that nano-zero-valent iron is prone to oxidation and agglomeration, which greatly reduces the active sites of nano-zero-valent iron, thereby reducing its removal eff...

Method used

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  • Preparation method of dictyophora-loaded vulcanized nano zero-valent iron and application
  • Preparation method of dictyophora-loaded vulcanized nano zero-valent iron and application
  • Preparation method of dictyophora-loaded vulcanized nano zero-valent iron and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation of bamboo fungus loaded with sulfide nanometer zero-valent iron comprises the following steps:

[0031] (1) After washing 0.5g of Dictyophora with ultrapure water and absolute ethanol, soak it in 60mL of ultrapure water for 2h, then transfer the solution to a 100mL autoclave and heat at 140°C for 12h. After cooling to room temperature, centrifuge at 4000 rpm for 10 min, wash with ultrapure water and absolute ethanol until the solution becomes neutral, remove the supernatant, and dry in a freeze-drying oven at -40°C for 24 h. Finally, the dried solid is ground into powder form for later use.

[0032] (2) Take 2.48g of FeSO 4 ·7H 2 O was dissolved in 125mL of ultrapure water, and then 0.5g of Dictyophora was mixed thoroughly under mechanical stirring for 5min, and then 0.11g of Na 2 S 2 o 4 Continue to stir for 5min, then use the syringe pump to inject NaBH 4 (200mL, 0.108mol / L) was added to the above suspension at a rate of 4mL / min. After 1h, the so...

Embodiment 2

[0037] The preparation of bamboo fungus loaded with sulfide nanometer zero-valent iron comprises the following steps:

[0038] (1) After washing 1g of Dictyophora with ultrapure water and absolute ethanol, soak it in 60mL ultrapure water for 3h, then transfer the solution to a 100mL autoclave and heat at 140°C for 14h. After cooling to room temperature, centrifuge at 4000 rpm for 10 min, wash with ultrapure water and absolute ethanol until the solution becomes neutral, remove the supernatant, and dry in a freeze-drying oven at -40°C for 24 h. Finally, the dried solid is ground into powder form for later use.

[0039] (2) Take 4.96g of FeSO 4 ·7H 2 O was dissolved in 250mL of ultrapure water, and 1g of bamboo fungus was added. After mixing thoroughly for 10min under mechanical stirring, 0.22g of Na 2 S 2 o 4 Continue to stir for 10min, then use the syringe pump to inject NaBH 4 (400mL, 0.108mol / L) was added to the above suspension at a rate of 4mL / min, and after 3 hours, ...

Embodiment 3

[0041] The preparation of bamboo fungus loaded with sulfide nanometer zero-valent iron comprises the following steps:

[0042] (1) After washing 2g of Dictyophora with ultrapure water and absolute ethanol, soak it in 60mL of ultrapure water for 5h, then transfer the solution to a 100mL autoclave and heat at 140°C for 16h. After cooling to room temperature, centrifuge at 4000 rpm for 10 min, wash with ultrapure water and absolute ethanol until the solution becomes neutral, remove the supernatant, and dry in a freeze-drying oven at -40°C for 24 h. Finally, the dried solid is ground into powder form for later use.

[0043] (2) Take 7.44g of FeSO 4 ·7H 2 O was dissolved in 500mL of ultrapure water, and 1.5g of bamboo fungus was added. After fully mixing for 15min under mechanical stirring, 0.33g of Na 2 S 2 o 4 Continue to stir for 15min, then use the syringe pump to inject NaBH 4 (600mL, 0.108mol / L) was added to the above suspension at a rate of 4mL / min, and after 5h, the s...

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Abstract

The invention discloses a preparation method of dictyophora-loaded vulcanized nano zero-valent iron. The method includes the following steps: (1) soaking dictyophora in ultrapure water, heating the obtained solution in a reaction kettle, washing until the solution is neutral, and grinding the dried solid into powder for later use; (2) mixing and dissolving FeSO4*7H2O, Na2S2O4 and the dictyophora material obtained in step (1) in water, and adding NaBH4 for reaction; and (3) performing solid-liquid separation, washing and drying on the product obtained in the step (2) by using a magnet to obtaina dictyophora-loaded vulcanized nano zero-valent iron material. The dictyophora-loaded vulcanized nano zero-valent iron prepared by the method can be used for efficiently removing radionuclide uranium in wastewater, and has the advantages of simple and convenient operation, good removal effect, high chemical stability, cleanness, no pollution, no toxic effect on the environment, and wide application prospect in the field of radionuclide pollution control.

Description

technical field [0001] The invention belongs to the technical field of radioactive wastewater treatment, and in particular relates to a preparation method of bamboo fungus loaded with sulfurized nanometer zero-valent iron and the application of the bamboo fungus loaded with sulfurized nanometer zero-valent iron material to remove uranium from radioactive wastewater. Background technique [0002] Uranium is the main chemical element for nuclear power plants to produce energy, so uranium ore is mined and processed in large quantities. The processing of uranium ore usually includes acid or alkaline leaching, solvent extraction, ion exchange and uranium precipitation, etc. During this process, uranium-containing waste liquid will inevitably be generated. In addition, some man-made activities include nuclear weapons research and manufacture, mining and processing of uranium-containing metal ores, coal burning, and use of uranium-containing phosphate fertilizers, etc., which may l...

Claims

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Application Information

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IPC IPC(8): B01J20/24G21F9/12B01J20/30
Inventor 王祥学于淑君庞宏伟王祥科
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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