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Uranium separation method and uranium adsorption material

A technology for desorption and deionization of water, applied in the field of separation of uranium, can solve the problems of narrow pH value range, poor bridging ability, small molecular weight, etc., and achieve the effects of simple method, reduced cost and high specificity

Pending Publication Date: 2019-12-03
LANZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practical applications, chitosan, as an adsorbent for heavy metal ions, still has shortcomings such as small molecular weight, poor bridging ability, and narrow pH range, which limits its application.

Method used

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  • Uranium separation method and uranium adsorption material
  • Uranium separation method and uranium adsorption material
  • Uranium separation method and uranium adsorption material

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Embodiment Construction

[0022] The present invention is illustrated below in conjunction with examples.

[0023] The adsorption experiment of material of the present invention

[0024] 1) Solution preparation:

[0025] (1) The configuration of 1 g / L arsenazo(Ⅲ) solution: ① put 1 g of arsenazo(Ⅲ) reagent into a small beaker; ② dissolve the reagent in 30 mL of deionized water, transfer the solution to 1000 ③ Wash the inner wall of the beaker with an appropriate amount of deionized water 3-4 times, and transfer the washing solution to a 1000 mL volumetric flask; ④ Dilute the solution to 1000 mL accurately and shake well; ⑤ Keep it in the dark for 3 days; ⑥ Transfer to 1000 mL mL brown reagent bottle for later use.

[0026] (2) 2×10 -4 mol / L of UO 2 (NO 3 ) 2 Solution preparation: ① Accurately weigh 0.0502 g of UO 2 (NO 3 ) 2 ·6H 2 O reagent, transferred to a small beaker; ②20 mL of 0.1 mol / L HNO 3 Dissolve the reagent in the solution, and transfer the solution to a 500 mL volumetric flask af...

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Abstract

The invention discloses a method for separating uranium from a low-acidity nitric acid solution as well as a uranium adsorption material used by the method and a preparation method. According to the method for separating uranium from the low-acidity nitric acid solution, an amidoximized chitosan water suspension liquid is added to a low-acidity uranium-containing solution, the pH value of the system is adjusted to be 2-7.5, the mixture is sufficiently vibrated or stirred, a liquid supernatant is separated through centrifugation, and nitric acid with the concentration of about 0.04-0.50 M is added for desorption. The desorption conditions are mild, discharge of large quantities of strong acid and toxic and harmful substances is avoided, no secondary pollutants are produced, and the uraniumadsorption material is a novel green and environment-friendly material. Corresponding experiments prove that the uranium adsorption material is applicable to treatment of low-acidity uranium-containing wastewater in the nuclear industry and enterprises in China, and the separation treatment method is relatively simpler and more convenient and can be used in a mass production environment.

Description

technical field [0001] The invention relates to a method for separating uranium from a low-acidity nitric acid solution, as well as a uranium adsorption material used in the method and a preparation method. Background technique [0002] Uranium is the most common radionuclide contaminant in natural systems and may be involved in mining, chemical refining, enrichment, and other nuclear-related activities. Therefore, stripping and enrichment have attracted much attention in the past decades. There are many methods for removing and enriching U(Ⅵ) ions from aqueous solutions, such as precipitation, ion exchange, adsorption, liquid-liquid extraction, and half-wave rectified AC electrochemical methods. Among these methods, the adsorption method is widely used because of its simple operation, low cost, and large-scale application. During the removal and recovery of uranium, many studies have focused on various adsorbents, including inorganic materials, synthetic organic polymers,...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30G21F9/12
CPCB01J20/265G21F9/12B01J2220/4825
Inventor 刘同环雷志伟段国建马佳驹牛智伟吴王锁吴蓉
Owner LANZHOU UNIVERSITY
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