Treatment method of uranium-containing waste water

A treatment method and wastewater technology, which is applied in nuclear engineering, radioactive purification, etc., can solve the problems of equipment corrosion solution treatment, complicated process flow, and increased costs, and achieve the effects of reducing water environmental protection pressure, improving removal efficiency, and saving costs

Inactive Publication Date: 2015-10-14
KUNMING UNIV OF SCI & TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

People such as Zhao Sufen reported the experimental research of zero-valent iron treatment of uranium-containing wastewater in "Zerovalent Iron Treatment of Wastewater Containing Uranium", "Industrial Water Treatment", 7 (31), (2011). First, hydrochloric acid and Sodium hydroxide adjusts the pH of the uranium-containing wastewater to be treated, and the introduction of chloride ions will corrode the equipment and adversely affect the solution treatment
Zhou Quanyu and others reported that sulfate reducing bacteria (SRB) and zero valent iron (ZVI) The potential of synergistically removing pollutants such as uranium and sulfate in wastewater has achieved good results. This process not only uses hydrochloric acid and sodium hydroxide to adjust the pH of the solution, but also needs to domesticate and cultivate sulfate-reducing bacteria flora. The process is complicated and greatly increased cost

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  • Treatment method of uranium-containing waste water

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Experimental program
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Effect test

Embodiment 1

[0053] Embodiment 1: the treatment of uranium-containing wastewater

[0054] The specific processing flow of this embodiment is as attached figure 1 shown. The implementation steps of this embodiment are as follows:

[0055] A. Adjust the pH value

[0056] Under the condition of stirring, add the uranium concentration of 2000μg / L and pH 1.0 from the uranium extraction section to the industrial uranium-containing wastewater from the uranium ore leaching to remove solid impurities. For the remaining aqueous phase, adjust the pH value of the industrial uranium-containing wastewater to 3.6 to obtain a pH-adjusted industrial uranium-containing wastewater;

[0057] B. Add iron powder

[0058] According to the ratio of industrial uranium-containing wastewater in liters and iron powder in grams is 7:1, adding zero-valent iron content to 50% and 80 mesh iron powder in the industrial uranium-containing wastewater obtained in step A to adjust pH, In the reactor, the reaction was car...

Embodiment 2

[0061] Embodiment 2: the treatment of uranium-containing wastewater

[0062] The specific processing flow of this embodiment is as attached figure 1 shown. The implementation steps of this embodiment are as follows:

[0063] A. Adjust the pH value

[0064] Under stirring conditions, add uranium concentration of 12000 μg / L, The raffinate aqueous phase with a pH of 0.8, the pH value of the industrial uranium-containing wastewater is adjusted to 5.4 to obtain a pH-adjusted industrial uranium-containing wastewater;

[0065] B. Add iron powder

[0066] According to the ratio of industrial uranium-containing wastewater in liters and iron powder in grams is 10:1, adding zero-valent iron content to 98% and 90 mesh iron powder in the industrial uranium-containing wastewater obtained in step A to adjust pH, In the reactor, the reaction was carried out for 130min at room temperature and under the condition of stirring at a stirring rate of 500rpm to obtain a kind of iron powder trea...

Embodiment 3

[0069] Embodiment 3: the treatment of uranium-containing wastewater

[0070] The specific processing flow of this embodiment is as attached figure 1 shown. The implementation steps of this embodiment are as follows:

[0071] A. Adjust the pH value

[0072] Under the condition of stirring, add the uranium concentration of 500μg / L and pH 0.2 from the uranium extraction section to the industrial uranium-containing wastewater with a uranium concentration of 12000μg / L and a pH of 10 from the extraction and separation of uranium leachate to remove solid impurities. For the remaining aqueous phase, adjust the pH value of the industrial uranium-containing wastewater to 3.0 to obtain a pH-adjusted industrial uranium-containing wastewater;

[0073] B. Add iron powder

[0074] According to the ratio of industrial uranium-containing wastewater in liters and iron powder in grams is 3:1, adding zero-valent iron content to 60% and 120 mesh iron powder in the industrial uranium-containing...

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Abstract

The invention relates to a treatment method of uranium-containing waste water. The treatment method comprises steps such as pH value adjusting, adding of iron powder, and filtering. According to the treatment method, uranium factory raffinate is used for adjusting pH value of uranium-containing waste water, and iron powder high in zero-valent iron content is used, uranium removing efficiency of uranium-containing waste water is increased obviously, cost is reduced, environment protection is realized, and industrialized application prospect is promising.

Description

【Technical field】 [0001] The invention belongs to the technical field of hydrometallurgy. More specifically, the present invention relates to a treatment method for uranium-containing wastewater. 【Background technique】 [0002] With the rapid development of the global atomic energy industry and the wide application of nuclear fuel cycle and nuclear technology, the amount and types of radioactive waste water produced are increasing, and its sources are also very wide. Applications (such as uranium mining, uranium smelting, reactor operation, reactor fuel reprocessing, production and use of radioisotopes, etc.) emit large amounts of radioactive wastewater. In addition, in uranium production plants, in addition to the uranium process flow, the raffinate produced from the supernatant obtained by dissolving uranium chemical concentrates after extraction treatment also contains a relatively high concentration of uranium, which cannot be directly discharged and is used for uranium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B60/02G21F9/06G21F9/10
Inventor 彭金辉李静张利波夏洪应陈菓郭文倩马爱元林国
Owner KUNMING UNIV OF SCI & TECH
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