Method for preventing and controlling heavy-metal movement of uranium tailings slag using plants

Abstract

The invention relates to a method for preventing and controlling migration of heavy metal pollutants in uranium tailings by plants. Five plants, namely Rhus chinensis, Trema orientalis, Buddleja officinalis, Melilotus officinalis and Pouzolzia zeylanica which have strong drought resistance and can retain different heavy metals are planted in a matching way, and applied with plant carbon and phosphate fertilizer at the same time so as to establish vegetation in a uranium tailings polluting area in a short time. Through reestablishment of the vegetation, the nitrogen content of the polluted soil is obviously increased, and the contents of the water-soluble heavy metals such as uranium are obviously reduced. The plants selected by the method are all planted locally, so the materials are easily taken, and the plants are easily planted and quickly grown; moreover, the method has the advantages of having good efficiency for controlling pollution, improving the soil, beautifying the environment, and the like. The method can be used for controlling heavy metal pollution and reestablishing vegetation of various mine degraded ecosystems.

Description

technical field

[0001] The invention relates to a method for phytoremediation of polluted soil, in particular to a method for using plants to prevent and control the migration of heavy metal pollutants in uranium tailings slag. Background technique

[0002] The prevention and control of heavy metal pollution is a hot and difficult issue in international restoration ecology and environmental science research. my country has a large stockpile of uranium tailings and covers a large area, and the stockpiling area is close to the village. Due to the high heavy metal content, poor nutrition and weak water holding capacity of uranium tailings slag, the vegetation in the area where uranium tailings slag is stored is lacking, soil erosion is serious, and heavy metals diffuse with rainwater and dust, causing harm to the surrounding environment and the health of residents. Treatment and control of uranium tailings slag pollution meet the requirements of national sustainable developmen...

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