A high-efficiency treatment system and treatment method for uranium-containing wastewater

A technology of a treatment system and a treatment method, which is applied in the application field of water treatment, can solve the problems of high energy consumption, secondary pollution, and low treatment efficiency of uranium-containing wastewater, and achieves large treatment flow, secondary pollution, and difficulty in secondary pollution. Effect

Inactive Publication Date: 2018-11-30
EAST CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a high-efficiency treatment system for uranium-containing wastewater, which aims to improve the current problems of low-concentration uranium-containing wastewater treatment in uranium mining areas, high energy consumption, and secondary pollution.

Method used

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  • A high-efficiency treatment system and treatment method for uranium-containing wastewater
  • A high-efficiency treatment system and treatment method for uranium-containing wastewater
  • A high-efficiency treatment system and treatment method for uranium-containing wastewater

Examples

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Effect test

Embodiment 1

[0069] The heap leaching wastewater of a uranium tailings pond in Jiangxi was treated, the pH of the raw water was 4.0-5.0, and the uranium concentration was 4.94mg / L. Add polyaniline according to the molar ratio of organic ligand to uranium 3:1, the dosage of sodium sulfate electrolyte is 5%, and the residence time in the chelating agent adding pool 110 is 4min; The internal residence time is 4min; electrocoagulation reaction in a predetermined reactor composed of iron anode (8 pieces) and graphite cathode (7 pieces), the single electrode voltage is 1.4V, and the current density is 8mA / cm 2 , the waste water stays in the electrolytic tank 130 for 6 minutes, and the treatment capacity is 90t / d; finally, it is left in the sedimentation tank 150 for 40 minutes, and the final effluent of the sedimentation tank is taken to measure the uranium concentration of 0.02mg / L, and the iron concentration of the effluent is 0.571mg / L at this time ;Take water samples every 1h to measure the ...

Embodiment 2

[0071] The heap leaching wastewater of a uranium tailings pond in Guangzhou was treated, and the pH of the wastewater was determined to be 4.0-5.5, and the uranium concentration was 7.6mg / L. Add polyaniline according to the molar ratio of organic ligand to uranium 3:1, add 5% of electrolyte sodium sulfate, and stay in the chelating agent addition pool 110 for 4 minutes; use sodium hydroxide to adjust the pH to 6.8-7.2, The residence time in 120 is 4min; electrocoagulation reaction in a predetermined reactor composed of iron anode (8 pieces) and graphite cathode (7 pieces), the single electrode voltage is 1.3V, and the current density is 8mA / cm 2 , the residence time of wastewater in the electrolytic tank 130 is 6min, and the treatment capacity is 90t / d; finally, it is left standing in the sedimentation tank 150 for 40min, and the final effluent of the sedimentation tank is taken to measure the uranium concentration to be 0.04mg / L, and the iron concentration in the effluent is 0...

Embodiment 3

[0073] Heap leaching wastewater from a uranium tailings pond in Xinjiang was treated, the raw water had a pH of 5.5-6 and a uranium concentration of 5.05mg / L. Add polyaniline according to the molar ratio of organic ligand to uranium 2.5:1, the dosage of electrolyte sodium sulfate is 5%, and the residence time in the chelating agent addition pool 110 is 3min; The internal residence time is 5 minutes; the electrocoagulation reaction is carried out in a predetermined reactor composed of iron anode (8 pieces) and graphite cathode (7 pieces), the single electrode voltage is 1.0V, and the current density is 7mA / cm 2 , the waste water stays in the electrolytic tank 130 for 5 minutes, and the treatment capacity is 90t / d; finally, it is left in the sedimentation tank 150 for 35 minutes, and the final effluent of the sedimentation tank is taken to measure the uranium concentration of 0.015mg / L, and the iron concentration of the effluent is 0.561mg / L at this time ;Take water samples ever...

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Abstract

The invention relates to the technical field of water treatment application, and provides a high-efficiency treatment system for uranium-containing wastewater, which comprises a chelating agent addition pool, a pH adjustment pool, an electrolysis pool and a sedimentation pool, which are sequentially connected to each other. The system can effectively remove uranium in wastewater, and the system occupies a small area and is easy to operate. The invention also provides a high-efficiency treatment method for uranium-containing wastewater implemented by the high-efficiency treatment system for uranium-containing wastewater provided by the invention. It has high removal efficiency for uranium, flexible use, large processing flow rate, and is not easy to cause secondary pollution.

Description

technical field [0001] The invention relates to the technical field of water treatment applications, in particular to a high-efficiency treatment system and treatment method for uranium-containing wastewater. Background technique [0002] Under the current international background of energy shortage and environmental constraints, nuclear power is favored by all countries because of its clean, efficient, low-carbon, and economical characteristics. As the main fuel for nuclear power generation, natural uranium is the basis for the development of nuclear power, and its supply is related to the stability of the operation of the nuclear power industry. It is estimated that by 2020, my country's annual demand for natural uranium will reach 16,400 tons. In order to meet the development of my country's nuclear power industry, it is necessary to intensify the exploration, mining and dressing and smelting of uranium resources; however, the mining and dressing of uranium mines have br...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21F9/20G21F9/06G21F9/10
CPCG21F9/06G21F9/10G21F9/20
Inventor 李鹏王学刚王光辉王立章易炼肖丛亮
Owner EAST CHINA UNIV OF TECH
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