Composite vegetation bag for remediation of polluted soil in manganese ore area and application method thereof

Abstract

The invention relates to the technical field of soil remediation, and discloses a composite vegetation bag for remediation of contaminated soil in a manganese ore area and an application method of the composite vegetation bag. According to the invention, functional structure partition is performed in the composite vegetation bag to configure woody and herb plate, so two orientations of immobilized remediation and activated remediation are effectively fused, the synergistic restoration advantages of the herb and woody plants are fully excavated, the final survival rate of the woody plants is increased, a long-acting stable remediation effect is achieved, loss of a nutrient medium of a remediation base material and activation of heavy metal can be effectively controlled, rapid greening of wasteland in a mining area is achieved, and water and soil loss and further diffusion of the heavy metal are reduced. Meanwhile, the construction mode of the composite vegetation bag is rapid, simple and convenient, an engineering quantity is small, investment is low, disturbance to a remediation object is small, a bag body material is made of a degradable material, secondary pollution and damage are avoided, and a remediation mode combining short-term restoration, water retention and soil fixation of waste land vegetation in the manganese ore area and long-term treatment of heavy metal pollution can be achieved.

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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