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In-situ control of heavy metals and vegetation improvement methods in lead-zinc smelting waste residues

A heavy metal and waste slag technology, applied in the restoration of polluted soil, etc., can solve the problems of heavy metal pollution, achieve the effects of increasing water holding capacity, increasing the mineral nutrient content of the stockyard medium and soil microbial activity, and improving the planting conditions of the stockyard

Inactive Publication Date: 2016-05-18
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although plant litter can effectively improve the mineral nutrient status of the medium and significantly promote the growth of repairing plants, there are many reports in the existing literature or patents, but the use of plant litter to control heavy metal pollution in lead-zinc ore smelting waste residues has not yet been reported. see the report

Method used

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  • In-situ control of heavy metals and vegetation improvement methods in lead-zinc smelting waste residues
  • In-situ control of heavy metals and vegetation improvement methods in lead-zinc smelting waste residues
  • In-situ control of heavy metals and vegetation improvement methods in lead-zinc smelting waste residues

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Embodiment 1

[0012] Embodiment 1 of the present invention: heavy metal in-situ control and plant growth improvement method of lead-zinc smelting waste residue, collect litter such as the dead branches and fallen leaves of cedar cedar in spring and summer, cut and break to below 2cm; weigh 500g of lead-zinc smelting The waste residue was placed in a nutrient bowl, and the litter of the pioneer plant Cryptomeria chinensis (Cedaraceae, coniferous evergreen tree) to be planted in large quantities in the lead-zinc slag field was placed in a covering thickness of 2 cm, and then the covered litter The litter was mixed with 5cm of the surface of the storage yard; at the same time, the lead-zinc smelting waste residue group without added plant litter was used as a blank (control), sprayed with clean water, mixed evenly, covered with non-woven fabric, and degraded naturally for 3 months, and the undegraded litter was selected and removed According to the requirements of the following determination in...

Embodiment 2

[0014] Embodiment 2 of the present invention: heavy metal in-situ control and vegetation improvement method of lead-zinc smelting waste slag, collecting litter such as the litter of Arundos reed in autumn and winter, shearing and crushing to below 2cm; other is the same as embodiment 1.

Embodiment 3

[0015] Embodiment 3 of the present invention: heavy metal in-situ control and vegetation improvement method of lead-zinc smelting waste slag, collecting litter such as black locust leaves in autumn and winter, shearing and crushing to less than 2 cm; others are the same as embodiment 1.

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Abstract

The invention discloses a heavy metal in-situ control and vegetation improvement method of lead-zinc smelting waste slag. The heavy metal in-situ control and vegetation improvement method comprises the following steps: a. selecting and collecting plant litters; b. covering a waste slag storage yard or mixing a surface layer; c. degrading; and d. recovering or repairing. According to the heavy metal in-situ control and vegetation improvement method of lead-zinc smelting waste slag, by using the litters of pioneer species which are suitable for growing in the lead-zinc smelting waste slag storage yard, through surface covering or mixed fermentation degradation, a characteristic polluted heavy metal in the storage yard is effectively immobilized in situ, the release is inhibited, the water retention and holding property of the lead-zinc smelting waste slag is improved, the content of medium mineral nutrients in the storage yard and the activity of microorganisms in soil are remarkably improved, the vegetation condition of the storage yard is effectively improved, and a good earlier-stage foundation is laid for the later-stage vegetation recovering work.

Description

technical field [0001] The invention relates to the technical field of ecological restoration of industrial and mining waste land, in particular to a method for in-situ control of heavy metals and vegetation improvement of lead-zinc smelting waste residue. Background technique [0002] In recent years, my country's metal smelting industry has developed faster and faster. On the one hand, it has made a great contribution to my country's economic development. On the other hand, due to the backward production and treatment technology, the solid waste generated has brought downstream water pollution, soil Severe secondary environmental problems such as pollution and ecological imbalance, land occupation and environmental pollution by mining wasteland have become restrictive factors for regional social and economic development. my country is rich in lead-zinc ore resources. For example, the Shuicheng-Hezhang ore belt in northwestern Guizhou is the main producing area of ​​lead-zin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00
Inventor 吴永贵麻占威付天岭吴宇易华静
Owner GUIZHOU UNIV
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