A composite planting bag for remediation of contaminated soil in lead-zinc mining areas and its application method
A technology of polluted soil and application method, which is applied in the field of soil remediation, can solve the problems of long-term remediation of abandoned mining areas and bottlenecks in the repair period, and achieve the effect of economical and environmentally friendly construction mode, small engineering quantity and low investment
Active Publication Date: 2022-06-28
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 for remediation of contaminated soil in lead-zinc mining areas, comprising a bag body 1, an opening of the bag body 1 is provided with a sealing edge 2, and two insulating layers 3 are arranged inside the bag body 1. The bag body 1 is horizontally divided into three independent areas, the middle is the immobilization repair area, and the two sides are the activation repair area; the two activation repair areas and the immobilization repair area are the effect layer 4 and the matrix layer 5 from bottom to top. and vegetation layer 6; the effect layers 4 of the two activation repair areas are filled with heavy metal activators, and the effect layers 4 of the immobilization repair areas are filled with heavy metal passivators; The fillings in the vegetation layer 6 of each activated restoration area are Pb, Zn, Cd, Cu and other hyper-accumulated herb seeds and germination substrates, and the fillings in the vegetation layer 6 in t...
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The invention relates to the technical field of soil remediation, and discloses a design and application method of a composite planting bag used for remediation of heavy metal polluted soil in lead-zinc mining areas. Through the partitioning of the functional structure of the composite vegetation bag and the configuration of hyperaccumulated herbaceous and tolerant woody plants, combined with the measures of filling and laying of the vegetation bag and subsequent maintenance, the two strategies of immobilization and activation restoration were effectively integrated, and the herbaceous plants were fully excavated. The synergistic restoration advantages of woody plants have realized the rapid regreening of abandoned mining areas, reduced soil erosion and further diffusion of heavy metals, improved the final survival rate of woody plants, and formed a long-term and stable restoration effect. At the same time, the composite planting bag has the characteristics of quick and easy construction in the process of site restoration, small engineering quantity and low investment, little disturbance to the restoration site, degradable bag material, and no secondary pollution. It is used in the restoration of heavy metal contaminated soil in lead-zinc mining areas. In practical application, it has the advantages of high efficiency, economy and environmental protection.
Description
technical field [0001] The invention relates to the technical field of soil remediation, in particular to a composite plant bag 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 rich in reserves, ranking first in the world. Since the 1950s and 1960s, five major production bases supporting lead and zinc mining, smelting and processing in Northeast China, Hunan, Guangdong and Guangxi, Dianchuan and Northwest China have been formed. above 95. The direct discharge of mining and beneficiation wastewater produced during the large-scale mining of lead-zinc mines, the exposure of stopes, and the stacking and leaching of solid wastes such as waste rock, tailings, and waste residues have caused serious heavy metal pollution in the mining area and surrounding environment. . Among them, there are multiple heavy metals such as Pb, Zn, Cd, Cu and other complex p...
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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