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Method for improving repair efficiency of uranium contaminated soil

A technology for soil remediation and polluted soil, applied in the field of strengthening phytoremediation of polluted soil, to achieve the effect of increasing the uranium content of plants

Inactive Publication Date: 2015-05-13
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the role of trace elements in strengthening phytoremediation of uranium-contaminated soil.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1 boron fertilizer is 25mgUkg to uranium pollution concentration -1 Absorption and enrichment of uranium in soil

[0016] The amount of uranium contamination in the test soil is 25mg Ukg -1 Soil, the uranium content of the soil itself is 2.16mg Ukg -1 Soil, pH 7.5 (soil: water = 1:1), organic matter content 31.6g·kg -1 , total nitrogen, phosphorus and potassium are 2.57, 0.985, 17.9g·kg -1 , alkaline hydrolysis nitrogen, available phosphorus and available potassium are 302, 33, 288 mg·kg respectively -1 . On February 15, the uranium-contaminated soil was evenly polluted by the saturated water-holding method, and placed in a cool and dry place for 2 months to facilitate soil adsorption. On April 15th, the uranium-contaminated soil was divided into two parts, one part was applied with 50 mg of boron per kilogram of soil (the drug used was boric acid powder, containing 17.48% boron), and the boric acid solution was uniformly poured on the uranium-contaminat...

Embodiment 2

[0019] Embodiment 2 boron is 50mgUkg to uranium pollution concentration -1 Absorption and enrichment of uranium in soil

[0020] The amount of uranium contamination in the test soil is 50mg Ukg -1 Soil, the uranium content of the soil itself is 2.16mg Ukg -1 Soil, pH 7.5 (soil: water = 1:1), organic matter content 31.6g·kg -1 , total nitrogen, phosphorus and potassium are 2.57, 0.985, 17.9g·kg -1 , alkaline hydrolysis nitrogen, available phosphorus and available potassium are 302, 33, 288 mg·kg respectively -1 . On February 15, the uranium-contaminated soil was evenly polluted by the saturated water-holding method, and placed in a cool and dry place for 2 months to facilitate soil adsorption. On April 15th, the uranium-contaminated soil was divided into two parts, one part was applied with 50 mg of boron per kilogram of soil (the drug used was boric acid powder, containing 17.48% boron), and the boric acid solution was uniformly poured on the uranium-contaminated soil acc...

Embodiment 3

[0023] Embodiment 3 boron is 75mgUkg to uranium pollution concentration -1 Absorption and enrichment of uranium in soil

[0024] The amount of uranium contamination in the test soil is 75mg Ukg -1 Soil, the uranium content of the soil itself is 2.16mg Ukg -1 Soil, pH 7.5 (soil: water = 1:1), organic matter content 31.6g·kg -1 , total nitrogen, phosphorus and potassium are 2.57, 0.985, 17.9g·kg -1 , alkaline hydrolysis nitrogen, available phosphorus and available potassium are 302, 33, 288 mg·kg respectively -1 . On February 15, the uranium-contaminated soil was evenly polluted by the saturated water-holding method, and placed in a cool and dry place for 2 months to facilitate soil adsorption. On April 15, the uranium-contaminated soil was divided into two parts, one part was applied with 50 mg of boron per kilogram of soil (the drug used was boric acid powder, containing 17.48% boron), and the boric acid solution was uniformly poured on the uranium-contaminated soil accor...

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PUM

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Abstract

The invention discloses a method for improving the repair efficiency of uranium contaminated soil. According to the method, the characteristic that boron can obviously improve the adsorption capacity of uranium enrichment plants to uranium is utilized, after boron elements (in 50 mg U.kg<-1> soil) are applied to the uranium contaminated soil (25-75 mg U.kg<-1>), plants with uranium enrichment capacity are planted, and when the plants grow to 50-60 cm or before the plants blossom, the plants are uprooted and are removed from the contaminated soil to be subjected to innocent treatment intensively. Through the adoption of the method disclosed by the invention, the uranium content of the plants can be increased by 38-123%, and the efficiency that the plants repair the uranium contaminated soil is greatly improved.

Description

technical field [0001] The invention relates to regeneration of polluted soil, in particular to a method for strengthening phytoremediation of polluted soil. Background technique [0002] The development of nuclear industry and nuclear energy utilization has led to a rapid increase in the use of uranium. The mining and smelting of uranium produces a large amount of tailings and waste, which seriously pollutes the soil. We measured hundreds of soil samples from uranium tailings in Hengyang, Hunan, and found that the uranium content of most samples was 25-75 mg·kg-1, much higher than the background value of 3.03 mg·kg-1 in soil (0-20 cm) in China (China Environmental Monitoring Center . Background values ​​of soil elements in China. Beijing: China Environmental Science Press, 1990, 87-90, 93-248, 260-324). Soil uranium accumulates in the human body due to bioaccumulation, and if the uranium content in the human kidney exceeds 3 mg kg-1, damage will occur (Sheppard S.C., Shepp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 唐永金罗学刚曾峰
Owner SOUTHWEAT UNIV OF SCI & TECH
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