Method for bonding uranium tailing slag by using carbon-nano-material-immobilized mineralization bacterium

A technology of carbon nanomaterials and tailings slag, which is applied in the field of solidification treatment of radioactive waste, can solve the problems that there are few treatment methods for uranium tailings slag, and there are no literature reports on uranium tailings slag cemented by carbon nanomaterials and mineralization bacteria. Diffusion and loss, effect of good adsorption properties

Inactive Publication Date: 2015-04-29
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are few treatment methods for uranium tailings, and there is no literature r

Method used

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  • Method for bonding uranium tailing slag by using carbon-nano-material-immobilized mineralization bacterium
  • Method for bonding uranium tailing slag by using carbon-nano-material-immobilized mineralization bacterium
  • Method for bonding uranium tailing slag by using carbon-nano-material-immobilized mineralization bacterium

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Take 100 grams of uranium tailings, add 5 milliliters of carbon fiber aqueous solution with a concentration of 1 mg per milliliter to the uranium tailings, mix well, and let stand for 24 hours. Put a layer of filter paper at the bottom of the test mold (which can be a cylindrical mold with an upper end and a hole in the bottom), put the uranium tailings into the test mold, and put another layer of filter paper on the uranium tailings to play a buffering role. Bacillus sarcina was expanded and cultivated in the liquid culture solution, and the composition and content of each liter of the liquid culture solution were: 20 grams of glucose, 12 grams of peptone, 5 grams of sodium chloride, 3 grams of potassium dihydrogen phosphate, dihydrogen phosphate 3 grams of potassium; the pH of the liquid culture solution is 8.0. Cultivate at 30°C for 24 hours, and centrifuge the bacterial liquid at 4000 rpm for 20 minutes to obtain concentrated bacterial liquid. Use a peristaltic pum...

Embodiment 2

[0029]Take 100 grams of uranium tailings, add 10 milliliters of carbon fiber aqueous solution with a concentration of 1 mg per milliliter to the uranium tailings, mix well, and let stand for 24 hours. Put a layer of filter paper at the bottom of the test mold (which can be a cylindrical mold with an upper end and a hole in the bottom), put the uranium tailings into the test mold, and put another layer of filter paper on the uranium tailings to play a buffering role. Bacillus sarcina was expanded and cultivated in the liquid culture solution, and the composition and content of each liter of the liquid culture solution were: 20 grams of glucose, 11 grams of peptone, 5 grams of sodium chloride, 3 grams of potassium dihydrogen phosphate, dihydrogen phosphate 3 grams of potassium; the pH of the liquid culture solution is 8.0. Cultivate at 30°C for 24 hours, and centrifuge the bacterial liquid at 4000 rpm for 20 minutes to obtain concentrated bacterial liquid. Use a peristaltic pum...

Embodiment 3

[0032] Take 100 grams of uranium tailings, add 8 milliliters of carbon fiber aqueous solution with a concentration of 1 mg per milliliter to the uranium tailings, mix well, and let stand for 24 hours. Put a layer of filter paper at the bottom of the test mold (which can be a cylindrical mold with an upper end and a hole in the bottom), put the uranium tailings into the test mold, and put another layer of filter paper on the uranium tailings to play a buffering role. Bacillus sarcina was expanded and cultivated in liquid culture medium, and the composition and content of each liter of liquid culture medium were: 20 grams of glucose, 11 grams of peptone, 5 grams of sodium chloride, 4 grams of potassium dihydrogen phosphate, dihydrogen phosphate Potassium 4 grams; the pH value of the liquid culture solution is 7.0. Cultivate at 30°C for 24 hours, and centrifuge the bacterial liquid at 4500 rpm for 30 minutes to obtain concentrated bacterial liquid. Use a peristaltic pump to inje...

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Abstract

The invention discloses a method for bonding uranium tailing slag by using a carbon-nano-material-immobilized mineralization bacterium. The method is characterized by comprising the following steps: culturing Sporosarcina pasteurii in a liquid culture solution to prepare a high-concentration bacterium solution with the concentration of 1-1.5*10<10>/ml; taking 100g of uranium tailing slag, spraying 5-20ml of 1mg/ml carbon nano material water solution, evenly mixing, and standing for 24 hours; adding 10-30ml of high-concentration bacterium solution, evenly mixing, standing for 2-3 hours, and sucking out the residual bacterium solution; adding 50ml of mineralization culture solution, culturing at 27-33 DEG C for 24 hours, and sucking out the mineralization culture solution to obtain the uranium tailing slag subjected to bonding treatment; repeating the process 5-10 times; and standing the uranium tailing slag after the last time for bonding treatment at 27-33 DEG C for 10-20 days, and bonding the uranium tailing slag into a block with certain permeation resistance and mechanical properties under the mineralization action of the microbe.

Description

technical field [0001] The invention belongs to the solidification treatment of radioactive waste, and relates to a method for cementing uranium tailing slag with carbon nanomaterials immobilized with mineralizing bacteria. It is especially suitable for cementing uranium tailings slag with carbon nanomaterials as the carrier of mineralizing bacteria, thereby effectively solving the diffusion and loss of uranium tailings slag. Background technique [0002] With the development of nuclear technology, people's demand for uranium is increasing. In the process of uranium mining, a large amount of uranium tailings are produced. There are more than 180 uranium tailings ponds and uranium tailings slag storage sites in China, most of which are located in Hunan, Guangzhou, Jiangxi and other places. Due to the erosion by rainwater, the pollutants will spread with the rainwater, and the radioactive gas radon will be released from the uranium tailings, which seriously affect the environ...

Claims

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Application Information

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IPC IPC(8): C22B60/02C22B3/18C22B7/00
CPCY02P10/20
Inventor 竹文坤胡作文段涛周磊罗学刚
Owner SOUTHWEAT UNIV OF SCI & TECH
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