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Method for stabilizing waste-dump heavy metal of polymetallic mine with biochar-manure compounded ameliorant and plant isolating layer

A multi-metal, dumping technology, applied in the direction of earth drilling, mining equipment, mining equipment, etc., can solve the problem of low investment and achieve the effect of reducing loss

Inactive Publication Date: 2018-07-31
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the deficiencies and technical deficiencies in the restoration and treatment of the existing southern polymetallic mine dumps, through the exploration of the development of amendments and the screening of vegetation planting models, combined with the improvement and stabilization effects of soil amendments and the dense isolation layer formed by plants, the aim is to Provide a method for stabilizing heavy metals in southern polymetallic mine dumps with good repair effect and long-lasting, stabilizing heavy metals in soil and reducing heavy metal loss, and at the same time having low investment

Method used

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  • Method for stabilizing waste-dump heavy metal of polymetallic mine with biochar-manure compounded ameliorant and plant isolating layer
  • Method for stabilizing waste-dump heavy metal of polymetallic mine with biochar-manure compounded ameliorant and plant isolating layer
  • Method for stabilizing waste-dump heavy metal of polymetallic mine with biochar-manure compounded ameliorant and plant isolating layer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1 Utilizes biochar-manure composite improver and plant isolation layer to stabilize the method for heavy metals in southern polymetallic mine dumps

[0047] (1) Preparation of the improver: the sludge biochar and manure chicken manure were mixed in proportion to form a compound organic fertilizer, wherein the sludge biochar accounted for 10% of the total weight of the improver.

[0048] (2) plowing the surface soil with a depth of 20 to 60 cm in the dump site of polymetallic mines, applying 5 tons of improver and 0.75 tons of lime per mu, and mixing the improver, lime with the surface soil;

[0049] (3) planting plant isolation layer: sowing mixed grass seeds in the soil after the step-up treatment in spring in March, and planting miscanthus and eucalyptus;

[0050] Among them, the mixed grass seeds include leguminous seeds Leucaena, Pigeon Bean, Bean, Amorpha and commercial grass seeds Bermudagrass, Bahia Grass, Tall Fescue, Ryegrass, Bermuda, Zoysia, which ...

Embodiment 2

[0054] Embodiment 2 Utilizes biochar-manure composite improver and plant isolation layer to stabilize the method for heavy metals in southern polymetallic mine dumps

[0055] The application of the method of the invention in the restoration of the dump site of the polymetallic mine in Dabaoshan, Guangdong Province.

[0056] 1. The application situation in the restoration of the dump site of Dabaoshan Polymetallic Mine in Guangdong Province

[0057] (1) Basic situation of the dump site of polymetallic mine in Dabaoshan, Guangdong Province

[0058] The demonstration base is located in the dump site of Fandong Village, Dabaoshan, Shaoguan City, Guangdong Province. The local climate is a subtropical monsoon climate, warm and there will be a lot of rainfall. The average annual rainfall is 1620mm, and the rainfall is mainly concentrated from March to September. The area of ​​this demonstration base is about 10000m 2 The basic physical and chemical properties of the dump soil are s...

Embodiment 3

[0067] Example 3 Comparison of the improvement effects of different treatment methods on polymetallic ore dumps

[0068] method:

[0069] Group C1 is a blank control without any treatment;

[0070] Group C2 was unimproved sowing mixed grass seeds;

[0071] K group is after applying 5 tons / mu compound improver, sowing kenaf seeds, and the sowing amount is 2kg / mu;

[0072] R group is after applying 5 tons / mu compound improver, planting ramie seedlings, ramie plant spacing is 10cm, row spacing is 15cm;

[0073] In the MP group, Miscanthus and Masson pine were planted in holes after applying 5 tons / mu of compound improver. The size of the hole was 20 cm×20 cm×40 cm, and the distance between plants and rows was 1 meter.

[0074] In the HS group, after applying 5 tons / mu of compound improver, sowing mixed grass seeds and hole-planting Miscanthus and Eucalyptus, see Example 2 for specific operations.

[0075] After the polymetallic mine dumps are treated by the above groups, the ...

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Abstract

The invention discloses a method for stabilizing waste-dump heavy metal of polymetallic mine with biochar-manure compounded ameliorant and plant isolating layer. Through the research and development of the ameliorant and the screening of vegetation planting modes, the improved and stable effects of a soil conditioner are combined, and the compact isolating layer is formed by leguminosae seeds, commercial herbal seeds, Chinese silvergrass and eucalypts, and therefore the oxidation of the heavy metal (such as Pb, Zn, Cu, Cd) is effectively inhibited, the releasing of heavy metal and H+ ions is also inhibited, the loss of the heavy metals at the waste-dump is reduced.

Description

technical field [0001] The invention belongs to the field of treatment and repair of dumps of polymetallic mines in the south. In particular, it relates to a method for stabilizing heavy metals in polymetallic mine dumps by utilizing a biochar-manure compound improver and a plant isolation layer. Background technique [0002] During the long-term mining of polymetallic mines, a large amount of heavy metals and acidic wastewater have been released to the surrounding environment, causing a series of environmental problems such as soil and water pollution. For example, many scholars have investigated the pollution status of the Dabaoshan mining area and its surrounding areas in Guangdong Province and found that the heavy metal elements lost during the mining process of polymetallic mines include Pb, Fe, Zn, Cu, Hg, As, Ag, and Cd. Among them, the large-area dumps generated during the mining process are one of the main pollution sources. At the same time, metal minerals such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/00
CPCE21F17/00
Inventor 晁元卿刘文深王诗忠汤叶涛仇荣亮
Owner SUN YAT SEN UNIV
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