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Adsorbent for removing low-concentration uranium and application thereof

An adsorbent and low-concentration technology, applied in the field of uranium adsorption, can solve the problems of high production cost, low adsorption efficiency, and difficulty in recycling and reuse, and achieve the effects of low cost, fast adsorption rate, and good chemical and mechanical stability

Inactive Publication Date: 2015-09-30
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these materials still have defects such as low adsorption efficiency, high production cost, and difficulty in recycling and reuse in practical applications. Therefore, it is urgent to develop a safe, efficient, and economical adsorption material.

Method used

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  • Adsorbent for removing low-concentration uranium and application thereof
  • Adsorbent for removing low-concentration uranium and application thereof
  • Adsorbent for removing low-concentration uranium and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation of embodiment 1 adsorbent

[0025] 1. Preparation of reagents required for the experiment

[0026] Uranium standard stock solution: weigh 1.17929g U 3 o 8 (mass fraction>99.8%, CNNC 272 Uranium Industry Co., Ltd.), placed in a 100mL beaker. Add 10mL HCL, 3mL H 2 o 2 , two drops of HNO 3 , cover the watch glass, after the violent reaction stops, heat it on the sand bath until it is completely dissolved, take it off and cool it slightly, transfer it to a 1000mL volumetric flask, add water to the mark, shake well, this is the 1mg / mL uranium standard stock solution.

[0027] Uranium solutions of various concentrations: take different volumes of 1mg / mL uranium standard stock solution and dilute to prepare uranium solutions of required concentrations.

[0028] Isopropanol-diethylenetriamine mixed solution: measure 70mL of diethylenetriamine solution (Tianjin Bodi Chemical Co., Ltd.), and then add 30mL isopropanol solution (Tianjin Damao Chemical Reagent...

Embodiment 2

[0034] The difference with embodiment 1 is:

[0035] Weigh 10g of iron leaf powder and place it in a conical flask, add 80mL of diethylenetriamine-isopropanol mixed solution, and conduct physical and chemical modification in a vacuum oven at 55°C for 10h; the obtained product is washed three times with 50mL of absolute ethanol, distilled water Wash until neutral, and then vacuum-dry at 60°C for 6 hours to obtain the adsorbent.

Embodiment 3

[0037] The difference with embodiment 1 is:

[0038] Weigh 10g of iron leaf powder and place it in a conical flask, add 120mL of diethylenetriamine-isopropanol mixed solution, and conduct physical and chemical modification in a vacuum oven at 65°C for 4h; the obtained product is washed three times with 50mL of absolute ethanol, distilled water Wash until neutral, and then vacuum-dry at 60°C for 6 hours to obtain the adsorbent.

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Abstract

The invention relates to uranium adsorption for uranium-containing wastewater, in particular to an adsorbent for removing low-concentration uranium and application thereof. The adsorbent is obtained by drying and smashing plant leaves, modifying the plant leaves by a diethylenetriamine-isopropanol mixed solution and washing and drying a product. The adsorbent is applied to adsorb uranium in the uranium-containing wastewater at the pH value of 8.2 and is higher in adsorption efficiency.

Description

technical field [0001] The invention relates to uranium adsorption of uranium-containing wastewater, in particular to an adsorbent for removing low-concentration uranium and its application. Background technique [0002] As an economical and clean energy, nuclear energy can effectively alleviate the pressure of energy shortage. As the main raw material of nuclear energy, uranium can be used as fuel in nuclear reactors to convert nuclear energy into electrical energy. At present, the production capacity of natural uranium in China can only meet 1 / 3 of the demand, and the supply of uranium is under great pressure. A large amount of low-concentration uranium-containing radioactive wastewater is produced in the production process of uranium mining and metallurgy, which poses a serious threat to the ecological environment and human health. How to effectively control and recover uranium in wastewater has become an urgent problem to be solved. [0003] The uranium treatment meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J2/30G21F9/12
Inventor 肖锡林薛金花何博廖力夫谭丽梁俊
Owner NANHUA UNIV
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