Method for treating radioactive element-containing wastewater by using zeolitic material

A technology for the treatment of radioactive elements and materials, applied in the fields of radioactive pollutants, non-metallic elements, water/sewage treatment, etc., can solve the problems of limited adsorption effect and high cost of radioactive elements, and achieve high use value, fast reaction speed, and efficient adsorption. effect of ability

Inactive Publication Date: 2020-06-02
NANHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the adsorption effect of the adsorbent on the radioactive elements in the waste water is limited in the prior art, or solve the problem that the cost of the adsorption system in the prior art is too high

Method used

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  • Method for treating radioactive element-containing wastewater by using zeolitic material
  • Method for treating radioactive element-containing wastewater by using zeolitic material
  • Method for treating radioactive element-containing wastewater by using zeolitic material

Examples

Experimental program
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Effect test

Embodiment 1

[0044] According to m (basalt material): m (hydrochloric acid) = 10: 1, m (basalt material after pickling): m (sodium hydroxide) = 1: 1, weigh 40g of basalt material and dissolve in 50ml of hydrochloric acid solution ; 10g of pickled, washed and dried basalt material and 10g of sodium hydroxide particles were evenly mixed and placed in a crucible, and roasted at 650°C for 3h in a muffle furnace. Then take out the roasted solid, add 50ml of deionized water, age for 10h under the condition of magnetic stirring at 150r / min, transfer the mixture to a polytetrafluoroethylene autoclave, put it in an oven, and crystallize at a constant temperature of 120°C for 12h Afterwards, the reactor was taken out and cooled to room temperature. The obtained precipitate was washed with deionized water until neutral, and the solid and liquid were centrifuged, and the upper layer solid was taken in a thermostat, and dried at 60° C. for 12 hours to obtain the product. Wherein the upper white solid ...

Embodiment 2

[0055] This example is to investigate the adsorption of basalt-based X-type zeolite materials to uranium-containing wastewater with different pH values. Image 6 The initial concentration of uranium-containing wastewater in the tests shown was 35 mg.L -1 , the adsorption time is 8h, the wastewater temperature is 30°C, the volume of the uranium-containing wastewater used in the test is 340mL, the amount of adsorbent in the wastewater is 0.005g, and the pH value of the wastewater is 3-10.

[0056] Depend on Image 6 It can be seen that the pH value of the wastewater is in the range of 5-7, and the composite material has a high adsorption capacity for uranium in the uranium-containing wastewater. from Image 6 It can be seen that the uranium-containing wastewater to be treated has a pH of 6 and is the result of adsorption of UO by basalt-based X-type zeolite materials. 2 2+ The optimal pH value, and the adsorption effect of this pH value data point is significantly better tha...

Embodiment 3

[0058] This example is to investigate the variation of the adsorption of basalt-based X-type zeolite material to uranium-containing wastewater with temperature. Figure 7 The initial concentration of uranium-containing wastewater in the tests shown was 35 mg.L -1 , the adsorption temperature is 25-45°C, the pH of the wastewater is 6, the volume of the uranium-containing wastewater used in the test is 340mL, the amount of adsorbent in the wastewater is 0.005g, and the adsorption time of the wastewater is 12h.

[0059] Depend on Figure 7 It can be seen that at a temperature of 30°C, the basalt-based X-type zeolite material has the maximum adsorption capacity of uranium in uranium-containing wastewater (adsorption capacity is 2268mg / g, adsorption rate is 95.33%). from Figure 7 It can be seen that when the adsorption temperature is 30°C, it is the best adsorption temperature. Additionally, from Figure 7 It can be seen that when the temperature of wastewater adsorption is 30...

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Abstract

The invention provides a method for treating radioactive element-containing wastewater by using a zeolite material, wherein the zeolite material adsorbent is a basalt-based zeolite material, and the basalt-based zeolite material is prepared by blending and melting basalt and an alkali at a high temperature of 500-800 DEG C and then crystallizing. According to the invention, the basalt-based X-typezeolite material used in the method is uniform in particle size distribution and complete in crystal form, has the size of 2-3 [mu]m, and has strong uranium adsorption capacity when being used for absorbing uranium from wastewater; the maximum adsorption capacity of the basalt-based X-type zeolite material to uranium reaches 2442 mg / g, and is 10 times the adsorption capacity of the common adsorption material to uranium; and the zeolite adsorbent obtained in the invention has a high use value, and the cost of the traditional industrial synthesis of the zeolite adsorbent is reduced.

Description

technical field [0001] The invention belongs to the field of resource utilization and environmental protection, in particular to a method for treating waste water containing radioactive elements by using zeolite materials. Background technique [0002] In recent years, with the continuous development of nuclear energy, radioactive nuclear waste has gradually increased, which has brought a heavy burden and serious crisis to the environment and ecology. Therefore, how to properly deal with radioactive nuclear pollution has become a worldwide environmental protection issue. At present, the methods for removing radioactive elements in the water environment include chemical precipitation, ion exchange, solvent extraction and adsorption. Among them, the adsorption method has been widely used in the actual wastewater treatment due to its advantages of high efficiency, low cost, simple treatment process and not easy to cause secondary pollution. [0003] Zeolite is a three-dimensi...

Claims

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Application Information

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IPC IPC(8): C02F1/28B01J20/28B01J20/16B01J20/30C02F101/20
CPCB01J20/165B01J20/28004C02F1/281C02F2101/006C02F2101/20
Inventor 阳鹏飞艾勇申海晨柯国军
Owner NANHUA UNIV
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