Bioremediation method for arsenic-containing tailings or waste residue

A bioremediation and waste residue technology, applied in the restoration of polluted soil, etc., can solve the problems of surrounding ecology and environmental threats, and achieve the effect of eliminating wind and water erosion pollution, low management technical requirements, and saving human, material and financial resources.

Inactive Publication Date: 2012-05-09
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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AI Technical Summary

Problems solved by technology

The above two methods need to invest a lot of manpower, material resources and financial resources, and the surface landfill will occupy a large area of ​​land, and pose a potential threat to the surrounding ecology and environment

Method used

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Examples

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Embodiment Construction

[0030] After leveling the tailings pond or waste residue pile, build a retaining dam around the tailings pond or waste residue pile, and build a 45cm wide × 35cm deep drainage ditch outside the dam foundation. Build a 3m wide road in the center of the tailings pond or waste dump to facilitate the passage of people and vehicles. Build 45cm wide x 35cm deep drainage ditches on both sides of the road. Build horizontal and vertical drainage ditches 35cm wide by 50cm deep on the tailings pond or waste pile, and divide the surface of the tailings pond or waste pile into a square shape of about 30×30m.

[0031] Dig pits on the surface of the tailings pond or waste residue pile at a distance of 80cm×80cm. The pit size is 30cm in diameter×30cm in depth. Fully mix 30 kg of guest soil with 300 g of compound fertilizer (N-P-K=15-15-15), and apply them to the above pits.

[0032] In spring or autumn, dig out centipede grass seedlings and miscanthus plants from the surrounding area, trans...

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PUM

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Abstract

The invention discloses a bioremediation method for arsenic-containing tailings or waste residue. An arsenic-containing tailings dam and a waste residue pile are subjected to quick on-site remediation by artificially transplanted pteris vittata and Chinese silvergrass. The tailings dam and the waste residue pile are flattened, and bulkhead dams and gutters are established; the pteris vittata and Chinese silvergrass are transplanted to the tailings dam and the waste residue pile; in the next year, the tailings dam and the waste residue pile grow normally; and after 2 to 3 years, a stable pteris vittata-Chinese silvergrass dominant plant community can be formed, and 10 kinds of arsenic-resistant plants are naturally settled simultaneously. After the vegetation of the tailings dam and the waste residue pile is recovered, the wind erosion and water erosion are eliminated, and the arsenic content in storm dripping and filtration water of the tailings dam and the waste residue pile is reduced from 5mg / L before remediation to 100 mu g / L.

Description

technical field [0001] The invention belongs to the fields of reclamation, ecological restoration and land restoration of abandoned mine land, that is to realize rapid ecological restoration of arsenic-containing tailing ponds through biotechnology, and eliminate environmental pollution and health threats of the tailing ponds to surrounding areas. Background technique [0002] Arsenic is a mineral-forming element, and arsenic is ubiquitous in non-ferrous metal deposits. The mining and smelting of non-ferrous metals make arsenic enter the environment, causing serious pollution. A large amount of waste rocks, tailings and smelting residues are produced in the process of mining, mineral processing and smelting, which are piled up in the mining area without effective treatment, forming tailings dams and waste residue piles. These tailings dams and waste residue piles not only occupy a large amount of The land will also release a large amount of pollutants to the environment due...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/10
Inventor 韦朝阳杨林生
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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