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A method for adsorbing uranyl in waste water by using silica composite material

A technology of silica and composite materials, applied in radioactive purification, nuclear engineering, etc., can solve the problems that the adsorption rate needs to be improved, and achieve the effects of easy large-scale production, improved use efficiency, and increased adsorption effect

Active Publication Date: 2018-05-11
江西城宏实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention has the advantages of simple method, easy operation at room temperature, no introduction of other impurities, environmental protection, economical and effective; but the adsorption rate still needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Disperse 100mg of SBA-15 ordered mesoporous silica material into 13mL of a mixed solution of ethylamine and oxalic acid, add 10mg of sodium lauryl sulfate, and add ultrasonic dispersion for 1h to prepare a suspension. Put it in the reactor, carry out normal-pressure micro-plasma discharge treatment, adjust the output current to 11mA, the output voltage to 2500V, and react for 30 minutes. After the reaction, filter the solid particles and perform centrifugal cleaning for several times, and then wash with absolute ethanol for 3 After the second time, vacuum-dry to prepare the adsorbent;

[0022] (2) Adjust 100mL of uranyl-containing wastewater to a pH of 4, put 60mg of adsorbent into it, stir and adsorb for 36h, and after filtration, centrifuge the filtrate to further separate the solids in the wastewater and collect solid particles.

[0023] The molar ratio of ethylamine and oxalic acid is 1:2, and the concentration of ethylamine in the mixed solution is 40g / L. In t...

Embodiment 2

[0026] (1) Disperse 100mg of MCM-41 ordered mesoporous silica material into a mixed solution of 33mL of ethylamine and oxalic acid, add 20mg of methyl pentanol, add ultrasonic dispersion for 2h to obtain a suspension, and place the suspension in In the reactor, carry out normal-pressure micro-plasma discharge treatment, adjust the output current to 15mA, output voltage to 3000V, and react for 30 minutes. After the reaction, filter the solid particles and perform centrifugal cleaning for several times, and then wash with absolute ethanol for 3 times. , vacuum-dried to prepare the adsorbent;

[0027] (2) Adjust 100 mL of uranyl-containing wastewater to a pH of 6.8, put 100 mg of adsorbent into it, stir and adsorb for 48 hours, and after filtration, centrifuge the filtrate to further separate the solids in the wastewater and collect solid particles.

[0028] Wherein the molar ratio of ethylamine and oxalic acid is 1:5, and the concentration of ethylamine in the mixed solution is ...

Embodiment 3

[0031] (1) Disperse 100mg of MSU-H type ordered mesoporous silica material into 13mL of a mixed solution of ethylamine and oxalic acid, add 20mg of polyacrylamide, and add ultrasonic dispersion for 1h to obtain a suspension, which is placed in In the reactor, carry out normal pressure micro-plasma discharge treatment, adjust the output current to 15mA, output voltage to 2500VV, and react for 30 minutes. After the reaction, filter the solid particles for several times and then wash them with absolute ethanol for 3 times. , vacuum-dried to prepare the adsorbent;

[0032] (2) Adjust 100 mL of uranyl-containing wastewater to a pH of 6.8, put 60 mg of adsorbent into it, stir and adsorb for 48 hours, and after filtration, centrifuge the filtrate to further separate the solids in the wastewater and collect solid particles.

[0033] The molar ratio of ethylamine and oxalic acid is 1:2, and the concentration of ethylamine in the mixed solution is 70g / L. In the atmospheric pressure mic...

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PUM

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Abstract

The invention discloses a method for adsorbing uranyl in waste water with a silicon dioxide composite. The method comprises the following steps that 1, a silicon dioxide material is utilized for carrying out normal pressure micro plasma discharging treatment, and therefore an adsorbent is prepared; 2, the waste water containing uranyl is adjusted till the pH ranges from 4 to 6.8, the adsorbent is put in the waste water, stirring and adsorbing are carried out for 36 h to 48 h, after filtering, filtrate is centrifugally treated to further separate solids in the waste water, and the solid particles are collected. The method is easy to operate, high in adsorption efficiency and good in waste water treatment effect, the adsorption effect can be monitored in real time, and good industrial practical prospects are achieved.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for adsorbing uranyl in wastewater by using a silica composite material. Background technique [0002] Uranium is a natural radioactive element and an important nuclear energy fuel with strong radiotoxicity. With the increasing development of nuclear energy, there are more and more uranium-containing wastewater. If these wastewater is not properly treated and discharged directly, it will cause great harm to human health. Extracting uranium from uranium-containing wastewater can effectively reduce uranium pollution and improve the utilization rate of uranium resources. Therefore, from the perspective of environmental protection and improving the utilization rate of uranium, it is of great practical value to extract, separate and utilize uranium in wastewater. [0003] At present, the more commonly used treatment methods for treating uranium-containing wastewater are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21F9/12
CPCG21F9/12
Inventor 李风浪
Owner 江西城宏实业有限公司
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