Composite vegetation bag for repairing contaminated soil in lead-zinc mining area and application method thereof
A technology of polluted soil and application method, which is applied in the field of soil remediation, can solve problems such as the bottleneck of the remediation period and long-term remediation of abandoned mining areas, and achieve the effect of small engineering volume, economical and environmentally friendly construction mode, and low investment
Active Publication Date: 2021-04-20
HUNAN ACAD OF FORESTRY
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Problems solved by technology
However, the planting bag solution still faces the bottleneck of the restoration period in the absence of maintenance in the later stage. The preparation mode mainly composed of herbaceous plants is also difficult to long-term restoration of abandoned landforms in mining areas. Improving the survival rate of woody plants with well-developed root systems is a construction and the main difficulty in maintaining the stable development of plant communities
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[0034] see Figure 1-5 , a composite planting bag used for remediation of contaminated soil in lead-zinc mining areas, comprising a bag body 1, a sealing edge 2 is arranged at the opening of the bag body 1, and two insulating layers 3 are arranged inside the bag body 1, and the insulating layer 3 will The bag body 1 is divided into three independent areas horizontally, the middle is the immobilized repair area, and the two sides are the activated repair area; the two activated repair areas and the immobilized repair area are the effect layer 4 and the matrix layer 5 from bottom to top. and the vegetation layer 6; the effect layer 4 of the two activation restoration areas is filled with heavy metal activators, and the effect layer 4 of the immobilized restoration area is filled with heavy metal deactivators; the matrix layer 5 is filled with a matrix that guarantees plant growth. The fillings in the vegetation layer 6 of the activated restoration area are super-enriched herbace...
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The invention relates to the technical field of soil remediation, and discloses a design and application method of a composite vegetation bag for remediation of heavy metal-contaminated soil in a lead-zinc mining area. By partitioning the functional structure of the composite vegetation bag, configuring hyperaccumulation herb plants and tolerant woody plants and combining the measures of filling and laying of the vegetation bag, later maintenance and the like, the two strategies of immobilization restoration and activation restoration are effectively fused, the synergistic restoration advantages of the herb plants and the woody plants are fully excavated, rapid green restoration of wasteland in the mining area is achieved, water and soil loss and further diffusion of heavy metals are reduced, the final survival rate of the woody plants is increased, and a long-acting stable remediation effect is achieved. Meanwhile, the composite vegetation bag has the characteristics of being rapid, simple and convenient to construct, small in work amount, low in investment, small in disturbance to a remediation site, degradable in bag body material, free of secondary pollution and the like in a site remediation process, and has the advantages of being efficient, economical, environmentally friendly and the like in practical application of remediation of heavy metal-contaminated soil in the lead-zinc mining area.
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 lead-zinc mining areas and an application method. Background technique [0002] my country's lead-zinc mines are widely distributed and its reserves are rich, ranking among the top in the world. Since the 1950s and 1960s, the country has formed five production bases for lead and zinc mining, smelting and processing in Northeast China, Hunan Province, Guangdong Province, Sichuan Province and Northwest China. above 95. The direct discharge of mining and beneficiation wastewater generated during the large-scale mining of lead-zinc mines, the exposure of the stope and the stacking and leaching of waste rocks, tailings, waste residues and other solid wastes have caused serious heavy metal pollution in the mining area and surrounding environment . Among them, compound pollution of multiple metals such as ...
Claims
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IPC IPC(8): B09C1/10A01G9/029A01G9/02A01B79/02
CPCY02P60/20
Inventor 黄兢周康张轩黄忠良李辉吴子剑覃晓莉阮敏江世林许昕宇
Owner HUNAN ACAD OF FORESTRY