Pre-embedded bag for multi-stage remediation of uranium-contaminated soil and use method thereof

Abstract

The invention discloses a pre-embedded bag for multi-stage remediation of uranium-contaminated soil and a use method thereof, and belongs to the technical field of uranium-contaminated soil remediation. The pre-embedded bag for multi-stage remediation of uranium-contaminated soil can be pre-embedded by a soil cleaning and per-embedding manner, on the one hand, uranyl ions in the soil are transferred through a strict water-conducting network, a large amount of uranyl ions are actively and quickly collected into the pre-embedded bag to facilitate fixed-point remediation, on the other hand, a special soil remediation agent is used to greatly improve adsorption and accumulation for uranyl ions, agglomeration of uranyl ions is improved based on nano porous properties, and uranyl ions are filledin micro-pores to avoid contamination and diffusion. After the active primary remediation, uranyl ions in the uranium-contaminated soil are reduced to a certain value, then natural secondary remediation, namely heavy metal uranium enrichment plant remediation, is followed, the soil organic matter content and soil fertility are increased, a soil surface structure is improved and maintained, and asolid foundation for direct use of the soil after uranium pollution remediation is laid.

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

[0004] 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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