A pre-embedded bag for multi-level restoration of uranium-contaminated soil and its application method

Abstract

The invention discloses a pre-embedded package for multi-level restoration of uranium-contaminated soil and a method for using the same, belonging to the technical field of uranium-contaminated soil restoration. A pre-embedded package for multi-level restoration of uranium-contaminated soil can be pre-embedded by clearing the soil, On the one hand, the uranyl ions in the soil are transferred through a tight water guide network, and a large amount of uranyl ions are actively and quickly gathered in the pre-embedded bag, which is convenient for fixed-point restoration; The adsorption and accumulation of uranyl ions is based on the nanoporous characteristics to enhance the aggregation of uranyl ions and fill them in micropores to avoid pollution diffusion. After active primary repair, the uranyl ions in uranium-contaminated soil are reduced to a certain level. value, followed by natural secondary remediation, that is, heavy metal uranium enrichment phytoremediation, which increases soil organic matter content and soil fertility, improves and maintains the soil surface structure, and lays a solid foundation for the direct use of uranium-contaminated remediated soil.

Description

technical field [0001] The invention relates to the technical field of uranium-contaminated soil remediation, in particular to a pre-embedded bag for multi-stage remediation of uranium-contaminated soil and a method for using the same. Background technique [0002] In recent years, the problem of heavy metal pollution in my country's soil has become increasingly prominent, posing a serious threat to the ecological environment, food safety and human health, which cannot be ignored. Waste gas, waste water, and waste residues discharged from industries such as dyestuffs, chemicals, tanning, mineral mining, smelting, and processing contain a large amount of heavy metals. Into the soil through other methods, resulting in an increase in the content of heavy metals in the soil, especially the exchangeable heavy metals, which are directly absorbed and enriched by crops, directly threatening human health. Compared with air pollution and water pollution, heavy metal soil pollution is...

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Problems solved by technology

[0005] The bioremediation method developed in recent years has become a research hotspot in uranium-contaminated soil remediation technology due to its low cost, high efficiency, low cost, safety, and environmental protection. The research results, such as phytoremediation, or the method of laying a remedial layer in uranium-contaminated soil, all have great limitations. Although phytoremediation has no secondary pollution and has a good remediation effect, the remediation speed is relatively slow. In the environment of heavily polluted soil, it is even more difficult to limit the diffusion rate, and the plants themselves are affected by many environmental factors, so it is difficult to effectively promote them. Although the effect of paving and filling repair layers is good and the speed is fast, on the one hand, the cost is high and recycling is difficult. On the other hand, it is difficult to effectively prevent the spread of uranium pollution

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