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Ecological restoration method for tailings bank

A technology for ecological restoration and tailings, applied in the field of tailings reservoir restoration

Active Publication Date: 2017-06-23
SHENZHEN TECHAND ECOLOGY & ENVIRONMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, there are few reports on the research on the rational use of plant characteristics for plant allocation.

Method used

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  • Ecological restoration method for tailings bank
  • Ecological restoration method for tailings bank
  • Ecological restoration method for tailings bank

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The test of the embodiment of the present invention is carried out by using Shizhuyuan lead-zinc ore tailings, wherein the contents of Pb and Cd all exceed the third-level standard of soil environmental quality standard (the soil critical value for ensuring agricultural and forestry production and normal growth of plants), and the contents of Pb and Cd exceed the three-level standard of soil environmental quality standard. 800mg·kg respectively -1 , 2 mg kg -1 , the Mn content is 6394 mg·kg -1 , all exceeding the background value of Hunan Province.

[0023] (1) Fully mix the modifier with a 20cm thick tailings surface layer at a volume ratio of 2%, and cure for 7-10 days. The modifier is a mixture containing 50% heavy metal stabilizer and mushroom residue fertilizer, wherein the heavy metal stabilizer is humic acid (10wt%), CaO (10wt%), calcium magnesium phosphate fertilizer (25wt%), peat soil (20wt%) , bentonite (20wt%) and vermiculite (15wt%).

[0024] (2) Plantin...

Embodiment 2

[0041] The test of the embodiment of the present invention is carried out by using Shizhuyuan lead-zinc ore tailings, wherein the contents of Pb and Cd all exceed the third-level standard of soil environmental quality standard (the soil critical value for ensuring agricultural and forestry production and normal growth of plants), and the contents of Pb and Cd exceed the three-level standard of soil environmental quality standard. 800mg·kg respectively -1 , 2 mg kg -1 , the Mn content is 6394 mg·kg -1 , all exceeding the background value of Hunan Province.

[0042] (1) The modifier is fully mixed with the tailings surface layer with a thickness of 20cm according to the volume ratio of 2%, and cured for 7-10 days. The modifier is a mixture containing 50% heavy metal stabilizer and mushroom residue fertilizer, wherein the heavy metal stabilizer is humic acid (10wt%), CaO (10wt%), calcium magnesium phosphate fertilizer (25wt%), peat soil (20wt%) , bentonite (20wt%) and vermicul...

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Abstract

The invention discloses an ecological restoration method for a tailings bank. The method comprises the steps that the surface layer of the tailings bank is improved, improvements comprise heavy metal stabilization and nutrient supplementation, plants can be planted on the tailings bank, landscape forest seedlings, landscape shrub seedlings, landscape herb seedlings, landscape herb stems and energy plant seedlings which have heavy metal tolerance are selected and planted on the surface layer of tailings according to certain planting spaces, and a soilless reclamation vegetation restoration system is built; the landscape forest seedlings comprise cryptomeria fortunei seedlings, the landscape herb seedlings comprise arundo donax var versicolor seedlings, the landscape herb stems comprise purple-spotted white clover stems, and the energy plant seedlings comprise jatropha gossypifolia seedlings; selected plant arrangement is achieved according to different adaptabilities of the plants to the climatic environment, flowering phases and flowers colors of the selected plants are different, the landscape effect of the tailings bank can be achieved all year round, when the plants grow to a certain stage, the plants adapt to the tailings growth environment, and the ecological restoration effect can be maintained.

Description

technical field [0001] The invention relates to the technical field of tailings silo restoration, in particular to a method for ecological restoration of a tailings silo. Background technique [0002] As a type of mining wasteland, tailings wasteland not only occupies a large amount of land, but also damages a large area of ​​vegetation and landscape, resulting in the disappearance of a large number of species, a sharp decline in biodiversity and ecosystem degradation. In addition, tailings contain a large amount of toxic and harmful substances, such as heavy metals, which are easy to pollute the surrounding soil and water bodies under the action of water erosion, leaching, and runoff, and the tailings in the tailings are also susceptible to wind erosion, resulting in dust pollution. Therefore, ecological restoration of tailings abandoned land and control of its pollution to the surrounding environment have become one of the current research hotspots. The ecological restora...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02
Inventor 林晓燕裴东辉熊云武周巍许建新孔丝纺唐彪彭昭良何新杰任国香
Owner SHENZHEN TECHAND ECOLOGY & ENVIRONMENT CO LTD
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