Radioactive comprehensive wastewater treatment method

A technology that integrates waste water and treatment methods, applied in radioactive purification, nuclear engineering, etc., can solve problems such as the reduction of pollutant concentration, and achieve the effect of large treatment capacity, simple process, and low equipment requirements

A technology that integrates waste water and treatment methods, applied in radioactive purification, nuclear engineering, etc., can solve problems such as the reduction of pollutant concentration, and achieve the effect of large treatment capacity, simple process, and low equipment requirements

CN113707352AActive Publication Date: 2021-11-26BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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  • Radioactive comprehensive wastewater treatment method
  • Radioactive comprehensive wastewater treatment method
  • Radioactive comprehensive wastewater treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Take the wastewater from a uranium tailings pond and analyze it. Among them, the concentration of uranium is 8mg / L, the concentration of manganese ion is 47.5mg / L, the concentration of inorganic ammonia nitrogen is 378mg / L, the concentration of COD is 210mg / L, and the concentration of chloride ion is 1870mg / L. L.

[0050] Put 2000mL of radioactive comprehensive wastewater into the deuranium sedimentation tank, add 11g of carbide slag with an average particle size of 1mm, stir and react for 0.5h at room temperature, and the pH value is 10. Let it stand for 5h to precipitate the precipitate, and then separate it by filtration.

[0051] Pass the separated wastewater into the electrolytic cell, using Ti / RuO 2 -IrO 2 Mesh titanium base plate is used as the anode plate, stainless steel plate is used as the cathode plate, the distance between the plates is 10cm, and the current density is adjusted to 20mA / cm 2 , treatment 3h.

[0052] The treated wastewater is introduced i...

Embodiment 2

[0056] The radioactive comprehensive wastewater was treated according to the method in Example 1, the only difference being that 9 g and 13 g of carbide slag with an average particle size of 1 mm were added, and after stirring and reacting for 0.5 h at room temperature, the pH values ​​were 9.5 and 11 respectively. Test the pH value, uranium content, manganese ion content, ammonia nitrogen content and COD value of the wastewater to be discharged. The test results are shown in Table 2.

[0057] Table 2:

[0058]

Embodiment 3

[0060] Process mine wastewater according to the method in Example 1, the difference is only that the current density is 15mA / cm 2 . Test the pH value, uranium content, manganese ion content, ammonia nitrogen content and COD value of the wastewater to be discharged. The test results are shown in Table 3.

[0061] table 3:

[0062]

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Abstract

The invention provides a radioactive comprehensive wastewater treatment method. Radioactive uranium is separated through a precipitator, intermediate wastewater is subjected to electrooxidation treatment, and the pollutant concentration is further reduced on the premise that the wastewater can be discharged in a standard reaching mode. After uranium is removed, manganese, ammonia nitrogen and COD in the wastewater can be further removed, and wastewater treatment is completed. The method is simple in process, low in equipment requirement, free of additional treatment agent, free of secondary pollution, capable of conducting batch treatment and capable of meeting the requirements of industrial production.

Description

technical field [0001] The invention belongs to the technical field of radioactive wastewater treatment, and in particular relates to a treatment method for radioactive comprehensive wastewater. Background technique [0002] Early uranium mining and uranium industrial production produced a large amount of solid waste, which was stored uniformly because of its radioactivity, especially in uranium tailings pools during uranium mining. After service, the tailings pond needs to be decommissioned and treated, and a large amount of wastewater will be generated during the decommissioning and treatment of the tailings pond. Override governance. On the premise of ensuring the safety of the upper covering layer, mechanical equipment can enter the site for construction. Only by fully removing the pore water can the phenomenon of differential settlement after treatment be avoided and the long-term stability of the covering layer can be guaranteed. [0003] Part of the tailing pond se...

Claims

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Application Information

Patent Timeline
26 Nov 2021
Publication
CN113707352A
IPC
G21F9/10; G21F9/04
CPC
G21F9/10; G21F9/04
Inventors
徐乐昌; 吴名涛