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A method of using woody plants to remediate uranium-contaminated soil

A technology for woody plants and uranium pollution, which is applied in the field of remediation of uranium-contaminated soil by using woody plants - American Bamboo Willow No. 3, can solve the problems of low planting survival rate, poor environmental adaptability, slow growth rate, etc., and achieves strong resistance , strong adaptability, strong germination effect

Active Publication Date: 2020-12-22
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 remediating uranium-contaminated soil by utilizing woody plants. The cuttings of the No. 3 U.S. bamboo and willow branches are inserted into the uranium-contaminated soil, and the steps of making them survive, grow to the above-ground parts for harvesting and carry out centralized treatment are as follows:

[0037] (1) Cut the branches: in February every year, cut a section of the No. 3 branch of American Bamboo Willow with 6 leaves, about 15cm long, the upper 3 leaves each retain two leaves, and the lower 3 leaves are removed from the petiole. cut off

[0038](2) The cutting branches are inserted into the uranium-contaminated soil: the pruned No. 3 branches of American Bamboo Willow are inserted into the uranium-contaminated soil by about 7cm, and the branches with leaves of 8cm are kept outside;

[0039] (3) After rooting and surviving, it will grow for a certain period of time: After cutting the branches of American Bamboo Willow No. 3 into the uranium-c...

Embodiment 1

[0042] Example 1, in February every year, cut a section of the No. 3 branch of American Bamboo Willow with 6 leaves, about 15cm in length, the upper 3 leaves each retain two leaves, and the lower 3 leaves are cut from the petiole. Then, the cut branches of American Bamboo Willow No. 3 were inserted into the uranium-contaminated soil with a soluble uranium content of 2 mg / kg for about 7 cm, leaving 8 cm of branches with leaves outside. After the branches of American Bamboo Willow No. 3 were cut into the uranium-contaminated soil, they were watered on time every day, and they began to take root after 3 days, and began to grow new leaves after 14 days. After careful management, rational fertilization. After 100 days of growth, American Bamboo Willow No. 3 grew into a small tree about 1.6m high. Then, the above-ground parts are harvested by manual harvesting, and moved to a safe place for centralized drying, crushing, incineration, and finally landfilling. After analysis, the ur...

Embodiment 2

[0043] Example 2, in February every year, cut a section of the No. 3 branch of American Bamboo Willow with 6 leaves, about 15cm in length, the upper 3 leaves each retain two leaves, and the lower 3 leaves are cut from the petiole. Then, the cut branches of American Bamboo Willow No. 3 were inserted into the uranium-contaminated soil with a soluble uranium content of 4 mg / kg for about 7 cm, leaving 8 cm of branches with leaves outside. After the branches of American Bamboo Willow No. 3 were cut into the uranium-contaminated soil, they were watered on time every day, and they began to take root after 3 days, and began to grow new leaves after 14 days. After careful management and reasonable fertilization, after 120 days of growth, American Bamboo Willow No. 3 has grown into a small tree with a height of about 1.8m. Then, the above-ground parts are harvested by manual harvesting, and moved to a safe place for centralized drying, crushing, incineration, and finally landfilling. A...

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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, in particular to a method for remediating uranium-contaminated soil by utilizing woody plant-American Bamboo Willow No. 3. Background technique [0002] The radionuclide uranium enters the soil mainly through adsorption with minerals in soil, complexation with organic humus in soil and precipitation reaction with anions in soil. The main sources of uranium-contaminated soil are nuclear testing, nuclear weapons 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 radioactively polluted soil produced by uranium mining and processing in the world has reached about 100 billion tons. Under the...

Claims

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Application Information

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Patent Type & Authority Patents(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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