A composite planting bag used for remediation of contaminated soil in manganese mining area and its application method

Abstract

The invention relates to the technical field of soil remediation, and discloses a composite planting bag for remediation of contaminated soil in manganese mining areas and an application method. The functional structure of the composite planting bag is divided into woody and herbal configurations, which effectively combines immobilization and restoration. Two orientations of activation and repair, fully tap the synergistic repair advantages of herbaceous plants and woody plants, improve the final survival rate of woody plants, form a long-term and stable repair effect, and can effectively control the loss of the repair substrate nutrient matrix and the activation of heavy metals, to achieve Rapid regreening of abandoned mining areas reduces water and soil loss and further diffusion of heavy metals; at the same time, the construction mode of the composite planting bag is fast and simple, with a small amount of work and low investment, and has little disturbance to the repaired objects. The bag body is made of degradable materials. Without secondary pollution and damage, it can realize the restoration model of short-term restoration of vegetation in abandoned manganese mining areas, water conservation and soil stabilization, and long-term treatment of heavy metal pollution.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a composite planting bag used for remediation of contaminated soil in manganese mining areas and an application method. Background technique [0002] my country's manganese ore is mainly distributed in Guizhou, Chongqing, Hunan, Yunnan, Guangxi and other provinces. Among them, Songtao in Guizhou, Xiushan in Chongqing, and Huayuan in Hunan form the "manganese triangle" with the most concentrated manganese reserves. Manganese and its compounds are important raw materials in metallurgy, chemical industry, building materials and other industries, among which the demand for manganese in the iron and steel industry is particularly prominent. The accumulation of waste rocks in the process of manganese ore mining, manganese slag produced by electrolytic manganese and other solid wastes has formed a large number of abandoned lands, and the surface landscape and soil resources hav...

AI Technical Summary

Problems solved by technology

However, the application of single planting bag technology in manganese ore wasteland still faces the problem of heavy metal stress: on the one hand, the vertical migration of water in the polluted soil layer makes heavy metal elements transfer to the upper planting bag; The growth of woody plants with developed root systems will eventually come into contact with the contaminated soil layer, thereby affecting their survival rate

Therefore, it is difficult for the long-term restoration of abandoned landforms in mining areas to use herbaceous plants as the main preparation mode, and improving the survival rate of woody plants with well-developed root systems is the main difficulty in building and maintaining the stable development of plant communities

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