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Method for remediating uranium-contaminated soil by virtue of woody plants

A woody plant and uranium-contaminated technology, applied in the field of repairing uranium-contaminated soil with woody plant-American Bamboo Willow No. 3, can solve the problems of poor environmental adaptability, low planting survival rate, slow growth rate, etc., and achieve strong adaptability , Strong resistance, strong germination effect

Active Publication Date: 2017-11-03
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the selected uranium-enrichment plants have disadvantages such as small biomass, slow growth rate, low planting survival rate, poor adaptability to adverse environments, low uranium enrichment, few varieties, and more concentrated in herbaceous plants.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0036] A method for repairing uranium-contaminated soil by using woody plants, which involves inserting cuttings of Bamboo willow No. 3 into uranium-contaminated soil, making it survive, growing until the aboveground part is harvested, and the steps of centralized treatment are:

[0037] (1) Cut the branches: In February every year, cut a section of the No. 3 branch of the American bamboo willow with 6 leaves, about 15cm long, keep two leaves for each of the upper 3 leaves, and the lower 3 leaves from the petiole cut off;

[0038](2) Cuttage branches into uranium-contaminated soil: insert the clipped branch of Bamboo Willow No. 3 into the uranium-contaminated soil for about 7 cm, and keep 8 cm branches with leaves outside;

[0039] (3) After rooting and surviving, grow for a certain period of time: After inserting the cuttings of Bamboo Willow No. 3 into uranium-contaminated soil, water it on time every day, and start to take root after 3 days, and start to grow new leaves aft...

Embodiment 1

[0042] Embodiment 1, in February every year, cut a section of the No. 3 branch of Bamboo willow with 6 blades, about 15cm, the upper 3 blades each retain two leaves, and the following 3 blades are cut off from the petiole. Then insert the clipped branches of Bamboo Willow No. 3 into uranium-contaminated soil with a soluble uranium content of 2 mg / kg for about 7 cm, and keep 8 cm branches with leaves outside. After the cuttings of Bamboo willow No. 3 were cut into uranium-contaminated soil, watered on time every day, roots began to take root after 3 days, and new leaves began to grow after 14 days. After that, carefully manage and fertilize rationally. After 100 days of growth, American Bamboo Willow No. 3 grew into a small tree about 1.6m high. Then the above-ground part is harvested by manual harvesting, and moved to a safe place for drying, crushing, incineration, and finally landfill. After analysis, the uranium content of the stem of No. 3 American bamboo willow is 14.93...

Embodiment 2

[0043] Embodiment 2, in February every year, cut a section of No. 3 branch of Bamboo willow with 6 blades, about 15cm long, the upper 3 blades each retain two leaves, and the following 3 blades are cut off from the petiole. Then insert the clipped branches of Bamboo Willow No. 3 into uranium-contaminated soil with a soluble uranium content of 4 mg / kg for about 7 cm, and keep 8 cm branches with leaves outside. After the cuttings of Bamboo willow No. 3 were cut into uranium-contaminated soil, watered on time every day, roots began to take root after 3 days, and new leaves began to grow after 14 days. After careful management and reasonable fertilization, after 120 days of growth, American Bamboo Willow No. 3 grew into a small tree about 1.8m high. Then the above-ground part is harvested by manual harvesting, and moved to a safe place for drying, crushing, incineration, and finally landfill. After analysis, the uranium content of the stem of No. 3 American bamboo willow is 43.34...

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Abstract

The invention relates to a method for remediating uranium-contaminated soil by virtue of woody plants. The method for remediating the uranium-contaminated soil by virtue of the woody plants specifically comprises the following steps: branches of American bamboo-willow No. 3 are directly cut in the uranium-contaminated soil, and survive and grow, the American bamboo-willow No. 3 absorbs uranium in the soil into the own bodies of the plants during a growth process and transfers uranium to overground parts, and the overground parts are harvested and subjected to centralized treatment, so that uranium in the uranium-contaminated soil is reduced; and meanwhile, lots of uranium can also be fixed in roots of the American bamboo-willow No. 3, so that migration and diffusion of uranium are reduced. The method is applicable to remediation for uranium-contaminated soil in the peripheries of places such as uranium mines, uranium hydrometallurgical plants, uranium waste-rock yards and uranium tailing reservoirs.

Description

technical field [0001] The invention relates to the technical field of phytoremediation of uranium-contaminated soil, and in particular relates to a method for remediating uranium-contaminated soil by using the woody plant-American Bamboo Willow No. 3. Background technique [0002] The radionuclide uranium enters the soil mainly through adsorption with minerals in the soil, complexation with organic humus in the soil, and precipitation reaction with anions in the soil. The sources of uranium-contaminated soil mainly include nuclear testing, nuclear weapon manufacturing, nuclear energy production and nuclear accidents, production and application of radioisotopes, use of radionuclide-containing fertilizers, uranium mining, and uranium processing. According to statistics, the cumulative amount of uranium tailings, uranium tailings, uranium waste rock, uranium mineralized soil and radioactive contaminated soil produced by uranium mining and processing has reached about 100 billi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
CPCB09C1/105B09C2101/00
Inventor 胡南丁德馨陈威胡劲松陈可陈思羽王永东
Owner NANHUA UNIV
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