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Method for restoring soil polluted by high-concentration uranium with garden sorrel

A high-concentration, uranium-contaminated technology, applied in the restoration of polluted soils, can solve the problem of no significant impact on plant seed germination and growth, and achieve strong stress resistance and reproduction ability, high biological yield, and growth rate. quick effect

Inactive Publication Date: 2013-12-11
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing tests of screening and enriching uranium plants, the amount of soil artificial pollution is between 5 and 100 mg U kg-1 dry soil (Tang Li et al. Restoration of uranium-contaminated soil hyperaccumulation plants Research on the screening and accumulation characteristics of uranium. Nuclear Technology, 2009, 32, (2): 136-141; (3):322-326; Wan Qinfang et al. Uptake and enrichment of uranium in soil by plants. Acta Botanica Sinica, 2011, 46 (4): 425–436), no significant effect on plant seed germination, seedling emergence and growth Influence

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1 High-enrichment uranium contamination by sorrel (200mgU·kg -1 ) Absorption and enrichment of soil uranium

[0016] The amount of uranium contamination in the test soil was 200 mg U·kg -1 Dry soil, one year after soil uranium pollution (put it in a cool and dry place to allow the soil to fully absorb), sow sorrel on September 5. One week after the emergence of sorrel, the seedlings were settled, and there were 6 plants per pot. Keep the soil humidity at 60% to 80%, harvest on March 28 of the second year, and measure the dry weight and uranium content of the roots, stems and leaves.

[0017] The results showed that at 200 mg U·kg -1 In the soil polluted by high concentration uranium, sorrel grows well, and the uranium content in stems and leaves is 72.43 mg·kg -1 DW, root uranium content 182.14 mg·kg -1 DW, plant uranium content 145.17mg·kg -1 DW.

[0018] Sunflower is considered to be a good plant for the remediation of uranium-contaminated environmen...

Embodiment 2

[0019] Example 2 High-enrichment uranium contamination by sorrel (350mgU·kg -1 ) Absorption and enrichment of soil uranium

[0020] The amount of uranium contamination in the test soil was 350 mg U·kg -1 Dry soil, one year after soil uranium pollution (put it in a cool and dry place to allow the soil to fully absorb), sow sorrel on September 5. One week after the emergence of sorrel, the seedlings were settled, and there were 6 plants per pot. Keep the soil humidity at 60% to 80%, harvest on March 28 of the second year, and measure the dry weight and uranium content of the roots, stems and leaves.

[0021] The results showed that in the soil polluted by high concentration uranium, sorrel grew normally, and the uranium content in stems and leaves was 116.75 mg·kg -1 DW, root uranium content 347.43 mg·kg -1 DW, plant uranium content 248.92 mg·kg -1 DW.

[0022] Sunflower is considered to be a good plant for the remediation of uranium-contaminated environments (Zhang X...

Embodiment 3

[0023] Example 3 High-enrichment uranium contamination by sorrel (500mgU·kg -1 ) Absorption and enrichment of soil uranium

[0024] The amount of uranium contamination in the test soil was 500 mg U·kg -1 Dry soil, one year after soil uranium pollution (put it in a cool and dry place to allow the soil to fully absorb), sow sorrel on September 5. One week after the emergence of sorrel, the seedlings were settled, and there were 6 plants per pot. Keep the soil humidity at 60% to 80%, harvest on March 28 of the second year, and measure the dry weight and uranium content of the roots, stems and leaves.

[0025] The results showed that Rumex sorrel grew better in soil polluted with high concentration of uranium, and the uranium content in stems and leaves was 145.20 mg·kg -1 DW, root uranium content 485.26 mg·kg -1 DW, plant uranium content 365.45 mg·kg -1 DW.

[0026] Sunflower is considered to be a good plant for the remediation of uranium-contaminated environments (Zha...

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PUM

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Abstract

The invention discloses a method for restoring soil polluted by high-concentration uranium with garden sorrel. The method comprises the steps of finishing and leveling the polluted soil, applying 2000-3000kg human and livestock manure and adding 3000-4000kg water per 666.7m<2> on soil to be sown, seeding 1g per 1m<2> after pregermination of seeds, harvesting stem leaves on the ground when the stem height reaches 50-60cm, removing from the polluted soil for treatment, performing root diminution for regeneration after the next year, performing top dressing when regeneration seedlings have 4-5 leaves, irrigating plants with 1000-1500kg decomposed human and livestock manure per 667m<2>, diluting with 3000-4000kg water, and harvesting and treating stem leaves by the above-mentioned method. The method can greatly reduce the uranium content of the soil, and is simple to operate, convenient to manage, low in cost and good in restoring effect.

Description

technical field [0001] The invention relates to the regeneration of polluted soil, in particular to a method for repairing and treating uranium-contaminated soil with sorrel, and is suitable for high-concentration uranium (200-500mg U·kg -1 ) Remediation and treatment of contaminated soil. Background technique [0002] Nuclear pollution such as nuclear tests or nuclear accidents is very harmful to the environment. The control of nuclear pollution has attracted widespread attention at home and abroad. Under the comparison of cost and benefit, the use of phytoremediation of nuclear-contaminated soil has attracted great attention. However, many studies have shown that general plants have very little absorption of nuclides. Therefore, it is important to study and screen plants with strong nuclide enrichment capabilities and their planting methods to quickly and effectively remove soil nuclear pollution. important content. Common radioactive pollutants are 90 Sr, 89 Sr, 137 ...

Claims

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Application Information

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