Method for recovering uranium oxide from uranium containing wastewater

A uranium oxide and wastewater technology, applied in chemical instruments and methods, uranium oxides/hydroxides, alkali metal oxides/hydroxides, etc., can solve the problems of low efficiency, difficult industrialization, restrictions, etc., and achieve convenient recovery , The effect of simple process flow and convenient detection

Active Publication Date: 2019-08-16
YANGZHOU UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the cost of selective permeable membranes is high, and membrane fouling is prone to occur during the treatment process, which limits the use of this method and process.
Biosorption is mainly based on microorganisms i

Method used

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  • Method for recovering uranium oxide from uranium containing wastewater
  • Method for recovering uranium oxide from uranium containing wastewater
  • Method for recovering uranium oxide from uranium containing wastewater

Examples

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[0029] Example 1

[0030] First prepare polystyrene aldehyde-based microspheres:

[0031] (1) Mix 18 mL of isopropanol and 2.5 g of polyvinylpyrrolidone PVP dispersant, ultrasonically assisted dissolving, add it to a three-necked flask equipped with a condenser, and place it in a 70℃ constant temperature water bath, mechanically stir and maintain the speed 315 r / min;

[0032] (2) Dissolve 0.1 g of azobisisobutyronitrile AIBN initiator in 6 mL of styrene to prepare a styrene solution with the initiator dissolved;

[0033] (3) Add the styrene solution with initiator dissolved in (2) to the system obtained in (1), stir and mix well for 30 minutes, then add 3 mL of acrolein C 3 H 4 O, react at a constant temperature at 70°C for 8 h. After the reaction is stopped, the polystyrene aldehyde-based sphere emulsion is prepared by ultrasonic centrifugation and washing three times with ethanol and water, and polystyrene aldehyde-based microspheres are obtained after drying.

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Abstract

The invention relates to a method for recovering uranium oxide from uranium containing wastewater. Polystyrene functional microspheres, whose surface is rich in aldehyde groups, are synthesized through a copolymerization mode. Then the microspheres are used to process uranium containing wastewater. Aldehyde groups on the surface of the microspheres provide binding sites to adsorb free uranyl ions(UO22+); oxygen in the system can oxidize free uranyl ions; and finally polystyrene aldehyde-group microspheres with enriched uranium oxide are obtained. The prepared composite microspheres are burned or purified by an organic solvent to obtain yellow uranium oxide, and then solid powder is recovered. The solid powder is characterized by infrared spectroscopy (FT-IR), transmission electron microscope (TEM), ultraviolet-visible spectrophotometer (UV-VIS), and X-ray photoelectron spectroscopy (XPS). The provided method has the advantages that the processing process is simple, the conditions aremild, and the repeatability is good.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for recovering uranium oxide during the treatment of uranium-containing wastewater. Background technique [0002] my country's traditional energy development is dominated by coal and petroleum. With the advancement of science and technology and the people's appeal for green energy, the development and construction of nuclear energy has received more and more attention. At the same time, more and more attention has been paid to the treatment of radioactive wastewater generated during the development of nuclear energy. Wastewater contains radioactive elements such as uranium, radium, and cesium, which pose a great threat to people's production and living safety. Among them, uranium is the most common radioactive element, and uranium is generally in the hexavalent form (UO 2 2+ ) exists, the main hazard lies in the ionization effect caused by the absorption ...

Claims

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Application Information

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IPC IPC(8): C01G43/01G21F9/12G21F9/14B01J20/26B01J20/28B01J20/30
CPCB01J20/261B01J20/28016C01G43/01G21F9/125G21F9/14
Inventor 严长浩倪镜博刘如一陈灝洋曹霞张明
Owner YANGZHOU UNIV
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