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

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...

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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]

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