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Method for recycling treatment of industrial uranium-containing wastes

A waste and recycling technology, applied in the leach solution of industrial uranium-containing waste or industrial uranium-containing wastewater, can solve problems such as uranium pollution

Inactive Publication Date: 2012-07-25
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for resourceful treatment of industrial uranium-containing waste, a method for effectively solving the problem of uranium pollution

Method used

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  • Method for recycling treatment of industrial uranium-containing wastes
  • Method for recycling treatment of industrial uranium-containing wastes
  • Method for recycling treatment of industrial uranium-containing wastes

Examples

Experimental program
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Effect test

example 1

[0013] Example 1. Conversion of uranyl acetate by Gram-negative bacteria

[0014] Bacillus pallidus, Enterobacter cloacae and Escherichia coli were deposited or purchased from China General Microorganism Collection Center (CGMCC). The deposit or purchase numbers are: CGMCC1715, 1.1015 and 1.1100, respectively. The obtained strains were inserted into a 100 ml Erlenmeyer flask equipped with 30 ml of LB liquid medium, and placed in a shaker at 200 rpm under the conditions of aerobic, normal pressure, and 30° C. for shaking and culturing overnight to recover the strains. The above three recovered Gram-negative bacteria were transferred into four Erlenmeyer flasks respectively equipped with 250ml LB medium according to the ratio of bacterial solution to medium of 1:100. After culturing at 37°C for 24 hours, the bacteria were collected. The resulting cells are called biomass. The three biomasses were added to 210 μmol / L U(VI) soluble uranyl acetate in an amount of 500 mg / L dry we...

example 2

[0017] Example 2. Conversion of uranyl acetate by Gram-positive bacteria

[0018] Bacillus subtilis and Bacillus cereus were purchased from CGMCC, the purchase numbers are: 1.1630 and 1.1626, respectively. Gained bacterial classification is cultivated by the method for example 1 and obtains corresponding biomass. The biomass is added to 84 μmol / L soluble uranyl acetate in an amount of 200 mg / L in dry weight. After acting for 20-30 minutes, the precipitate was collected by centrifugation, and the residual U(VI) in the supernatant was measured by ICP-AAS (results are shown in Table 2). The uranium precipitated by two Gram-positive bacteria was added to a hydrothermal kettle with a liner volume of 20 milliliters in an amount of 0.1 g wet weight per milliliter, and 15 milliliters were added to each kettle. After covering the lid of the kettle, put it in an oven at 240°C and incubate for 48 hours. The XRD results showed that the soluble U(VI) was reduced to pitchblende, and the ...

example 3

[0021] Example 3. Conversion of uranyl acetate by yeast and its yeast extract

[0022] Yeast was purchased from China General Microorganism Collection Center (CGMCC), No. 2.2081; yeast extract was purchased from Angel Yeast Co., Ltd. The obtained yeast strains were inserted into an Erlenmeyer flask equipped with 30ml of complete yeast medium (complete yeast medium: 10g of yeast extract, 20g of peptone, 20g of glucose, and the volume was adjusted to 1L), and were placed in aerobic, normal pressure, and 28°C conditions. Place it in a shaker at 200 rpm and shake it overnight to revive the yeast strain. The recovered yeast was transferred into a Erlenmeyer flask filled with 250ml of complete yeast medium according to the ratio of bacterial liquid to medium 1:100. After culturing at 28°C for 24 hours, they entered and collected. The yeast collection and commercially purchased yeast extract were added to 252 μmol / L soluble uranyl acetate in an amount of 600 mg / L dry weight. After...

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Abstract

The invention discloses a method for the recycling treatment of industrial uranium-containing wastes. By a hydrothermal reaction in which biological substances and soluble U (VI) coexist, the soluble U (VI) can be reduced into asphalt uranium of which the particle diameter is 5 to 20nm; and the asphalt uranium with larger size is beneficial to precipitating and recycling. According to the method, uranium resources can be effectively extracted and recycled from uranium-containing wastes.

Description

technical field [0001] The invention relates to the leachate of industrial uranium-containing waste or industrial uranium-containing waste water, using biomass (Biomass) as a reducing agent, reducing hexavalent uranium by hydrothermal method to generate nano pitch uranium particle precipitation, thereby purifying and treating such uranium-containing waste And make it resourceful. Background technique [0002] With the rapid development of atomic energy in recent years, human demand for uranium has increased dramatically. According to the International Atomic Energy Structure data, as of January 2011, 442 nuclear power plants in 30 countries are in operation, and 65 nuclear power plants in 16 countries are under construction. Nuclear power plants in operation consume 66,000-69,000 tons of metal uranium fuel every year. Every 20 tons of uranium metal fuel produced ( 22.7 tons of UO 2 ) need to mine 17,000 tons of uranium ore. A large amount of uranium-containing waste an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F103/16
Inventor 程扬健林璋殷顺高吴智诚陈志潘晓鸿
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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