Application of Eucalyptus grandis in restoration of soil polluted by rare earth element lanthanum

Abstract

The invention relates to the field of restoration of soil polluted by a rare earth element in an environment through adopting a plant restoration technology, and concretely relates to an application of Eucalyptus grandis in the restoration of soil polluted by a rare earth element lanthanum. An application method comprises the following steps: directly planting Eucalyptus grandis seedlings in the soil polluted by the rare earth element lanthanum to make Eucalyptus grandis enrich the rare earth lanthanum; carrying out leaf and limb reparation on Eucalyptus grandis at regular intervals; and ashing leaves and limbs which are pruned away to restore the soil polluted by the rare earth element lanthanum. A substantial enrichment characteristic of Eucalyptus grandis plants to the rare earth element lanthanum (La) is utilized to permanently restore the soil polluted by the La, so the earth's surface can be stabilized, water can be massively fixed, and the pollutant diffusion and the water and soil loss can be prevented; and an advanced technology can also be utilized to ash to extract heavy metals, thereby the restoration of the soil polluted by the rare earth element can be further reached.

Description

technical field [0001] The invention relates to the field of using phytoremediation technology in the environment to restore soil polluted by rare earth elements, in particular to the application of Eucalyptus grandis in repairing soil polluted by rare earth element lanthanum. Background technique [0002] With the development of the economy, the increase of human activities, and the accelerating process of industrialization, the pollution of soil and water resources by rare earth elements such as lanthanum has become more and more serious. my country has identified the rare earth element lanthanum as the main environmental pollutant, and rare earth mineral The rare earth element pollution brought about by the development of China is the most serious. Western Sichuan is a well-known concentrated distribution area of ​​lead-zinc mines, copper mines, iron mines and rare earth mines. The tailings and waste water generated during the development of rare earth mines often pollute ...

AI Technical Summary

Problems solved by technology

[0004] At present, there are few types of plants that can be used to remediate rare earth element pollution in soil, mainly including hickory pilosula, hickory nut, fern fern, Osmanthus fragrans, etc., but these plants often grow slowly or have small biomass, so they are used in phytoremediation Therefore, the current plant species resources that can be used for the remediation of REE-contaminated soil are difficult to meet the actual needs, and further research is urgently needed

Images