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Method for treating/recycling uranium in low-concentration uranium-containing wastewater

A recovery method and low-concentration technology, applied in the direction of microorganism-based methods, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems of less research on the electrotaxis of environmental microorganisms, and achieve non-toxic products and smooth preparation processes. The effect of simplicity and ease of industrial production

Pending Publication Date: 2018-06-29
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many studies on electrotaxis of cells, but few studies on electrotaxis of environmental microorganisms

Method used

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  • Method for treating/recycling uranium in low-concentration uranium-containing wastewater
  • Method for treating/recycling uranium in low-concentration uranium-containing wastewater
  • Method for treating/recycling uranium in low-concentration uranium-containing wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The treatment / recovery method of uranium in low-concentration uranium-containing wastewater of the present invention uses microbial strains and surfactants to prepare electrotactic microbial preparations, and then uses them for the treatment of low-concentration uranium-containing wastewater. The electrotactic microbial preparations use polyphosphorus Reibacteria,

[0028] 1) The preparation process of the lysiform polyphosphorus bacteria is as follows:

[0029] Indigenous Laysia strains were screened and purified from the soil around the uranium tailings pool, and the indigenous Laysia species cultivated to the logarithmic growth phase were inoculated into the fermenter, and an alkyl phosphate salt-type anionic surfactant was added, and Regulating the content of anionic surfactant is 8%-10%, obtains described electrotaxis microbial preparation;

[0030] 2) Mix the prepared microbial agent with low-concentration uranium-containing wastewater, stir evenly, and apply an ...

Embodiment 2

[0032] The treatment / recovery method of uranium in low-concentration uranium-containing wastewater described in this example differs from Example 1 in that: in the preparation process of electrotaxis microbial preparations, indigenous Laysia strains are screened, purified and cultivated The specific steps are as follows:

[0033] 1) Take 10 g of soil near a uranium mine in Hengyang City, add 90 ml of sterile water to mix, let it stand at room temperature for 10 min, take the supernatant and make the concentration of 10 -1 to 10 -6 0.2 ml of different concentrations of bacterial suspensions were evenly spread on solid phosphorus-enriched plates, and cultured in a 30°C incubator for 48 h to obtain figure 1 the indicated strains;

[0034] 2) In the gradient plate with obvious single colony, use an inoculation loop to pick a single colony and transfer it to the phosphorus-rich medium, repeatedly streak, separate and purify until the single colony on the plate has the same shape,...

Embodiment 3

[0038] The treatment / recovery method of uranium in low-concentration uranium-containing wastewater in this example uses the electrotactic microbial adsorbent prepared in Example 2 to treat metal UO in low-concentration uranium-containing wastewater 2+ion, including the following steps: take 100 mL of low concentration UO with an initial concentration of 5 mg / L, 10 mg / L and 15 mg / L 2+ Solution, adjust the pH value of the solution to 6.0, add electrotactic microbial adsorbent, the amount of the adsorbent is 0.25 g / L, carry out the adsorption reaction at 30 ℃ constant temperature oscillator for 3 hours, and then separate the adsorbent from the waste water , Determination of remaining UO in wastewater by split-tube photometry 2+ The content of the calculated adsorption capacity is shown in Table 1:

[0039] Table 1: Microbial preparations for different UO 2+ The adsorption capacity of wastewater with initial concentration

[0040]

[0041] It can be seen from Table 1 that th...

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Abstract

The invention relates to an in-situ treatment and recycling technology for treating microorganisms of low-concentration uranium-containing wastewater by utilizing galvanotactic microorganisms, in particular to a method for treating / recycling uranium in low-concentration uranium-containing wastewater, which utilizes a microbial strain and a surfactant to prepare a galvanotactic microorganism preparation, and then utilizes the galvanotactic microorganism preparation to treat the low-concentration uranium-containing wastewater. The method comprises the following steps: (1) the galvanotactic microorganism preparation is prepared by adopting polyphosphate leifsonia, screening and purifying the peripheral soil of an uranium tailings pond, obtaining a native leifsonia strain, inoculating the native leifsonia strain which is cultured to logarithmic phase into a fermentation tank, adding alkyl phosphate salt anion surfactant, regulating the content of the anion surfactant to be 8 to 10 percent,and obtaining the galvanotactic microorganism preparation; and (2) mixing the obtained microbial strain and the low-concentration uranium-containing wastewater, uniformly stirring, applying an electric field to the wastewater, and treating and recycling the uranium by virtue of an adsorption reaction under the collective effect of the microbial strain and the electric field.

Description

technical field [0001] The invention relates to a microbial in-situ treatment and recovery technology for treating low-concentration uranium-containing wastewater by using electrotaxis microorganisms. Background technique [0002] Nuclear energy development and production processes produce a large amount of low-concentration uranium-containing wastewater, especially with the rapid development of my country's nuclear power industry, the output of uranium-containing radioactive wastewater will continue to increase. Due to the strong concealment and persistence of radioactive hazards, it is not easy to be detected. When metal uranium enters the environment, it will cause water and soil pollution. After that, radionuclides can enter the human body through various channels, causing serious damage to the environment and human health. At the same time, it will bring uneasiness and panic to the spirit and heart of the public, which is not conducive to social stability. In order to ...

Claims

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Application Information

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IPC IPC(8): C02F3/34G21F9/18G21F9/20C12N1/20C12R1/01
CPCC02F3/34C02F2101/006C12N1/20G21F9/18G21F9/20
Inventor 谭文发丁蕾蒋元清吕俊文王红强
Owner NANHUA UNIV
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