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Method for restoring and treating caesium and/or strontium polluted soil by using red spinach

A technology for polluted soil and red amaranth, which is applied in the restoration of polluted soil and other directions, can solve the problems of inability to fundamentally solve the problem of nuclide removal, secondary cross-contamination of the environment, and the concentration of nuclide cannot be too high, and achieves a good treatment effect. , beautify the environment, the effect of strong environmental adaptability

Inactive Publication Date: 2010-12-08
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most countries adopt the following methods: physical method, chemical method, electrochemical method, physical-chemical method, microbial removal method and soil nuclear pollution removal method, water washing, shoveling soil decontamination, deep plowing of cultivated land and stripping film-forming decontamination. Pollution method and forest restoration method, but these methods have high processing costs and are likely to cause secondary cross-contamination to the environment, and cannot fundamentally solve the problem of nuclide removal
Although the forest restoration method can remediate polluted soil in a large area, and can develop industrial raw material forests and firewood forests, the concentration of nuclides required by it should not be too high, so its application has been greatly restricted [Qiao Hua, Zhou Congzhi, Boil Lu et al. Harm of nuclear pollution and its removal method [J]. Journal of Logistics Engineering College, 2007, (1): 154-157]

Method used

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  • Method for restoring and treating caesium and/or strontium polluted soil by using red spinach
  • Method for restoring and treating caesium and/or strontium polluted soil by using red spinach
  • Method for restoring and treating caesium and/or strontium polluted soil by using red spinach

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Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1: Red amaranth cesium strontium hydroponic screening test

[0023] This experiment was carried out in Block 7E, East Laboratory Building, School of Life Science and Engineering, Southwest University of Science and Technology. The seeds of participating in the test red amaranth were purchased from Yunchuan Seed Company, Mianyang, Sichuan Province; in the middle of March, the red amaranth seeds were soaked in 0.5% NaClO (that is, the NaClO aqueous solution with a mass percentage concentration of 0.5%, the same as the following) for 20 minutes, and then sowed in in soil loaded with perlite. When the seedling grows to 5-6 leaves, transplant it into a plastic bucket equipped with 1000mL Hoagland nutrient solution (that is, Hoagland's nutrient solution, used as a compound fertilizer, which is the prior art, the same below). There is a foam board with holes, 1 plant per hole, 10 plants per bucket, the nutrient solution is changed every three days, and the cultivat...

Embodiment 2

[0025] Embodiment 2: further screening test of red amaranth cesium strontium hydroponics:

[0026] The participating plant in this experiment was red amaranth, and its seeds were purchased from Yunchuan Seed Company in Mianyang, Sichuan Province. In mid-March, after sterilizing the red amaranth seeds with 0.5% NaClO for 20 minutes, they were sown in the soil filled with perlite. When the seedlings grow to 5-6 leaves, transplant them into plastic buckets filled with 1000mL Hoagland nutrient solution. The surface of the bucket is covered with a foam board with holes. There is 1 plant per hole, 10 plants per bucket, and the nutrient solution is replaced every three days. Cultivate for 1 month. After 1 month, the nutrient solution was replaced with 133 Cs and 88 The Sr treatment solution was subjected to the absorption test. 133 Cs and 88The Sr treatment solution is based on the Hoagland nutrient solution, adding 0.1mmol / L, 0.5mmol / L, 1mmol / L, 5mmol / L 133 Cs and 88 Sr, test...

Embodiment 3

[0030] Embodiment 3: red amaranth cesium strontium soil screening test

[0031] filtered out 133 Cs, 88 Red amaranth, a plant with relatively strong Sr enrichment ability, was used as the experimental material, and the seeds of red amaranth were purchased from Yunchuan Seed Company in Mianyang, Sichuan Province. The test adopts potted plants, and the test site is outside the balcony of the teaching building of Dongqi Building, Southwest University of Science and Technology, Mianyang City, Sichuan Province (E=104°42'N=31°32', altitude: 462m). The soil used in the test was taken from the nursery test base of Southwest University of Science and Technology, and the soil type was yellow loam. Put the soil in a dark and ventilated place to dry naturally, remove the sundries, mash and sieve. The water-soluble and salt-soluble pH values ​​of the soil were measured with a pH meter; the soil organic matter was determined according to Tyurin's method; each gram of ground and sieved so...

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Abstract

The invention discloses a method for restoring and treating caesium and / or strontium polluted soil by using red spinach. The method is characterized by comprising the following steps of: planting the red spinach in the soil containing caesium and / or strontium pollutants, and harvesting the red spinach plant or moving the integral red spinach plant from the polluted soil when the red spinach plant grows to a flowering period or a mature period; and further, planting the red spinach of the next batch, moving the integral red spinach plant from the polluted soil when the red spinach plant grows to the flowering period or the mature period, and repeating the processes till the caesium and / or strontium content of the soil reaches the environmental safety standard. The method has the advantages of low energy consumption, low cost, low environmental perturbation, incapability of destroying the environmental soil structure and physicochemical property or causing secondary pollution and good soil treatment effect, can beautify the environment at the same time of treating the polluted soil, and permanently solves the pollution problem of the caesium and / or the strontium in the soil.

Description

technical field [0001] The invention belongs to the regeneration of polluted soil, and relates to a method for repairing and treating cesium and / or strontium polluted soil by using red amaranth. For cesium ( 137 Cs) and / or strontium ( 90 Sr) Remediation and treatment of contaminated soil. Background technique [0002] The radionuclides released by nuclear tests or nuclear accidents have attracted widespread attention as the most important potential nuclear pollutants in the environment. On the premise of cost-benefit optimization analysis, the bioremediation technology of radionuclide-contaminated soil has become a research hotspot in recent years. Existing studies have shown that the absorption of radionuclides by most plants is very low, so screening and planting plants with higher enrichment capacity for radionuclides to effectively remove radionuclides in the soil is a good way to prevent contaminated soils. One of the effective methods for soil bioremediation and gov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 王丹张晓雪唐运来徐长合
Owner SOUTHWEAT UNIV OF SCI & TECH
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