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
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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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