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Application of porous orderly silicon dioxide foam material to processing of radionuclide uranium in waste water

A technology of radionuclide and silica, which is applied in the application field of porous ordered silica foam material for the treatment of radionuclide uranium in wastewater, can solve problems such as radioactive wastewater pollution, and achieves reduction of harm, good removal ability, and removal of uranium. good effect

Inactive Publication Date: 2015-12-09
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of radioactive wastewater pollution, the present invention proposes to use a porous and ordered silica foam material as an adsorbent to adsorb radionuclide uranium in wastewater

Method used

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  • Application of porous orderly silicon dioxide foam material to processing of radionuclide uranium in waste water
  • Application of porous orderly silicon dioxide foam material to processing of radionuclide uranium in waste water
  • Application of porous orderly silicon dioxide foam material to processing of radionuclide uranium in waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Discuss the effect of different initial pH on the removal of radionuclide uranium from wastewater by porous ordered silica foam (MOSF):

[0023] Prepare 8 parts of 100mL simulated wastewater with uranium concentration of 100mg / L, study the effect of different initial pH, use HNO 3 , NaOH solution to adjust the pH of the initial lead solution to 2, 3, 4, 5, 6, 7, 8, add 0.020 g of porous and ordered silica foam material (MOSF) respectively, and place in a 180r / min constant temperature oscillation box to vibrate for 2 Hours, the temperature was controlled at 25°C. After the reaction is finished, samples are taken and filtered, the content of radionuclide uranium is measured, and the removal effect is calculated. According to the calculation results, the removal rate is the highest when the pH is 6. Too low pH is not conducive to the removal of uranium, such as figure 1 . When the pH is less than 5, the uranium ions in the solution exist in the form of uranyl; when the...

Embodiment 2

[0025] The influence of time on the removal of radionuclide uranium from wastewater by porous ordered silica foam (MOSF) is discussed:

[0026] Prepare 6 parts of 100mL simulated wastewater with a uranium concentration of 100mg / L, study the effect of time, and use HNO 3 , NaOH solution to modulate the optimal pH in Example 1, add porous ordered silica foam material (MOSF) 0.020g respectively, the temperature is controlled at 25°C, and placed in a 180r / min constant temperature oscillation box, according to the reaction time 10, Take samples and filter at 20, 30, 40, 60, 70, 80, and 100 minutes, measure the content of uranium ions, and calculate the adsorption amount. It can be seen from the calculation results that the adsorption amount of radionuclide uranium by the material gradually increases with the increase of time within a certain period of time, and the adsorption amount basically remains unchanged when the time is ≥ 40 min. It shows that the porous ordered silica foam...

Embodiment 3

[0027] Discuss the effect of initial concentration on the removal of radionuclide uranium from wastewater by porous ordered silica foam (MOSF):

[0028] Prepare 6 parts of 100mL simulated wastewater with uranium concentrations of 50, 75, 100, 150, 200, 250, and 300mg / L respectively, and study the influence of uranium ion concentration. 3 , NaOH solution to modulate the optimal pH in Example 1, add 0.020 g of porous ordered silica foam material (MOSF) respectively, control the temperature at 25° C., place it in a 180 r / min constant temperature oscillating box to react for 100 min, take samples and filter, measure The content of uranium ions was used to calculate the adsorption amount. It can be seen from the calculation results that with the increase of the concentration of uranium ions in the solution, the adsorption capacity of the material to the radionuclide uranium gradually increases, indicating that the porous ordered silica foam material (MOSF) has a good removal effect...

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Abstract

The invention discloses application of a porous orderly silicon dioxide foam material to processing of radionuclide uranium in waste water. The addition amount of the porous orderly silicon dioxide foam material in the waste water is not less than 0.02 mg / ml, and the pH value of the waste water is 2 to 8. The effect of the porous orderly silicon dioxide foam material for removing radionuclide uranium in the waste water is good, the removal rate can reach 99%, the porous orderly silicon dioxide foam material has good capacity for removing uranium ions in the waste water, and damage of the radioactive waste water to the environment can be reduced.

Description

technical field [0001] The invention belongs to the field of radionuclide treatment, in particular to the application of a porous ordered silicon dioxide foam material (Macroporous Ordered Siliceous Foams abbreviated as MOSF) to treat radionuclide uranium in waste water. Background technique [0002] With the continuous advancement of science and technology, the development and utilization of energy by human beings is also in continuous progress. Nuclear energy is a newly developed and utilized energy in modern times. As a relatively clean energy source, nuclear energy has the advantage of high efficiency. Nuclear power plants are the most common and widely used way for humans to use nuclear energy to convert it into electrical energy that can be used by humans, but the problem of radioactive pollution that comes with it also plagues humans. Similarly, the radioactive waste produced during the mining and smelting of uranium ore and other mines containing radionuclides not o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/06G21F9/12
Inventor 颜学武高馨梅胡霖陈冬李威姚宇健刘继明汪炤刘颖杨毅
Owner NANJING UNIV OF SCI & TECH
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