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Uranium mine wastewater treatment method

A treatment method and wastewater technology, which is applied in mining wastewater treatment, biological water/sewage treatment, neutralization water/sewage treatment, etc., can solve the problem of inability to effectively remove various pollutants in uranium mine wastewater, and achieve low treatment costs Effect

Pending Publication Date: 2021-06-01
HENGYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above problems, the purpose of the present invention is to provide a treatment method for uranium mine wastewater to solve the problem that the prior art cannot effectively remove multiple pollutants in uranium mine wastewater

Method used

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  • Uranium mine wastewater treatment method

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Embodiment 1

[0051] This embodiment provides a treatment method for uranium mine wastewater, wherein the concentration of dissolved oxygen in the wastewater is 5mg / L, 8mg / L Cu 2+ , 4mg / L Pb 2+ , 20mg / L UO 2 2+ , 10mg / L SO 4 2- , 8mg / L NO 3 - , the processing method includes the following steps:

[0052] 1) After isolating 10L of uranium mine wastewater from the air, add 3g of nitrite to react for 1 hour to obtain the first wastewater;

[0053] 2) adjusting the pH in the first wastewater to 7.0 by sodium hydroxide to obtain the second wastewater;

[0054] 3) The second wastewater is subjected to biological denitrification treatment, wherein 4 g of denitrifying bacteria are added for biological denitrification treatment, the temperature is 25° C., and the time is 2 hours, to obtain the third wastewater from which nitrate and nitrite are removed;

[0055] 4) Add 50 g of Desulfovibrio to the third wastewater, and after filtration and separation, purified wastewater is obtained.

[005...

Embodiment 2

[0058] This embodiment provides a treatment method for uranium mine wastewater, wherein the concentration of dissolved oxygen in the wastewater is 5mg / L, 8mg / L Cu 2+ , 4mg / L Pb 2+ , 20mg / L UO 2 2+ , 10mg / L SO 4 2- , 8mg / L NO 3 - , the processing method includes the following steps:

[0059] 1) After isolating 10L of uranium mine wastewater from the air, add 5g of nitrite to react for 1.5h to obtain the first wastewater;

[0060] 2) adjusting the pH in the first wastewater to 7.5 by sodium hydroxide to obtain the second wastewater;

[0061] 3) The second wastewater is subjected to biological denitrification treatment, wherein 5 g of denitrifying bacteria are added for biological denitrification treatment, the temperature is 35° C., and the time is 3 hours, to obtain the third wastewater from which nitrate and nitrite are removed;

[0062] 4) Add 80 g of Desulfovibrio to the third wastewater, and after filtration and separation, purified wastewater is obtained.

[0063]...

Embodiment 3

[0065] This embodiment provides a treatment method for uranium mine wastewater, wherein the concentration of dissolved oxygen in the wastewater is 5mg / L, 8mg / L Cu 2+ , 4mg / L Pb 2+ , 20mg / L UO 2 2+ , 10mg / L SO 4 2- , 8mg / L NO 3 - , the processing method includes the following steps:

[0066] 1) After isolating 10L of uranium mine wastewater from the air, add 10g of nitrite to react for 2 hours to obtain the first wastewater;

[0067] 2) adjusting the pH in the first wastewater to 8.0 by potassium hydroxide to obtain the second wastewater;

[0068] 3) The second wastewater is subjected to biological denitrification treatment, wherein 5 g of denitrifying bacteria are added for biological denitrification treatment, the temperature is 30° C., and the time is 6 hours, to obtain the third wastewater from which nitrate and nitrite are removed;

[0069] 4) Add 100 g of Desulfovibrio to the third wastewater, and after filtration and separation, purified wastewater is obtained. ...

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Abstract

The invention relates to a uranium mine wastewater treatment method which comprises the following steps: 1) isolating uranium mine wastewater from air, and adding nitrite for reaction to obtain first wastewater; 2) adjusting the pH value of the first wastewater to be alkaline to obtain second wastewater; 3) performing biological denitrification treatment on the second wastewater to obtain third wastewater; and 4) adding sulfate reducing bacteria into the third wastewater, and conducting filtering and separating to obtain purified wastewater. According to the treatment method, firstly, uranium mine wastewater is isolated from air, and dissolved oxygen in the wastewater is removed through nitrite; secondly, the pH value of the wastewater is adjusted to be alkaline, and a proper environment is provided for biological denitrification treatment; then, the influence of nitrate and / or nitrite on subsequent metal ion precipitation is eliminated through biological denitrification treatment; and finally, sulfate in the wastewater is reduced into hydrogen sulfide through the sulfate reducing bacteria, the hydrogen sulfide reacts with the metal ions to generate precipitates, and the precipitates are filtered and separated to obtain purified wastewater.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment method for uranium mine wastewater. Background technique [0002] As a radioactive metal element, uranium can release a large amount of energy through fission or fusion reactions, which can be used in nuclear power and other fields. [0003] At present, the nuclear fuel used in nuclear power is mainly uranium, and uranium ore mining and smelting process will produce waste water containing radioactive substances (such as uranyl ions) and other heavy metal ions (such as copper, lead, etc.), which will affect the ecological environment. Great harm to the environment and human health. [0004] At present, the treatment methods of wastewater usually adopt chemical precipitation method, ion exchange method, reverse osmosis method and evaporation concentration method. a polluting component. [0005] Therefore, there is an urgent need to develop a treatment me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/10C02F101/20C02F103/10
CPCC02F9/00C02F1/70C02F1/66C02F2103/10C02F2101/006C02F2101/101C02F2101/20C02F3/345C02F3/28
Inventor 易正戟刘最刘剑曾荣英
Owner HENGYANG NORMAL UNIV
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