Method for restoring uranium contaminated soil by constructing phytocoenosis community with bamboo willows, broad leaf paspalum and macleaya cordata

Abstract

The invention relates to a method for restoring uranium contaminated soil by constructing a phytocoenosis community with bamboo willows, broad leaf paspalum and macleaya cordata. The arbor bamboo willows, herbaceous plant broad leaf paspalum and macleaya cordata which have an enrichment effect on uranium in the soil are selected and arranged according to a composite triangle, and the stable phytocoenosis community with an in-situ restoration function on the uranium contaminated soil is constructed. Plants in the phytocoenosis community enrich uranium from the uranium contaminated soil, uraniumis transported to the overground part of the plants, thereby achieving the purpose of restoring the uranium contaminated soil. The disadvantages of the monotonous plant species structure, poor stability, low soil fertility, smaller total enrichment amount and low ecological function of an existing plant restoration technology for restoring the uranium contaminated soil with the single plant population are overcome, the synergistic effect exists among the three plants, and compared with a method for restoring the uranium contaminated soil with the single plant population, the restoration efficiency is significantly improved.

Description

technical field [0001] The invention belongs to the technical field of uranium-contaminated soil phytoremediation, and in particular relates to a technology for remediating uranium-contaminated soil by using bamboo willow, paspalum broad-leaf and burdock to build a plant community. Background technique [0002] As a very important strategic resource in the field of nuclear power industry and nuclear technology application, uranium is also a radioactive heavy metal element. While uranium resources mining satisfies the utilization of nuclear energy and nuclear technology, it also produces a large amount of uranium-containing waste rocks and tailings. Under various weathering effects, the uranium in the tailings may migrate to the pedosphere, seriously affecting the quality of the soil. function, leading to the destruction of the ecological landscape, the reduction of biodiversity, and eventually through the food chain, bringing potential harm to the regional ecosystem and resi...

AI Technical Summary

Problems solved by technology

[0005] At present, a large number of hyperaccumulator plants have been extensively studied. However, most hyperaccumulator plants have small biomass and limited total uranium extraction, which limits their large-scale application.

The treatment effect of phytoremediation depends on the ability of plants to enrich uranium and the biomass of plants, so how to increase the biomass of plants, improve the ability of plants to enrich uranium, and their resistance to adversity has become a major issue in phytoremediation of uranium-contaminated soil technology. Therefore, some uranium-enriching plants with large biomass have gradually received widespread attention. However, current research mainly focuses on the remediation of uranium-contaminated soil by a single species, and there are few reports on the use of plant communities to enhance the species diversity of remediation systems.

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