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 surrounding ecological and environmental threats, and achieve the effect of eliminating wind erosion and water erosion pollution, saving manpower, material and financial resources, and requiring low management technology

Inactive Publication Date: 2011-03-30
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

[0029] After leveling the tailings pond or waste slag pile, build retaining dams around the tailings pond or waste slag pile, and build a 45cm wide x 35cm deep drainage ditch on the outside of the dam foundation. A 3m-wide road is built in the center of the tailings pond or waste slag heap to facilitate the passage of people and vehicles. Build 45cm wide x 35cm deep drainage ditches on both sides of the road. Horizontal and vertical drainage ditches 35cm wide × 50cm deep shall be built on the tailings pond or waste slag pile, and the surface of the tailings pond or waste slag pile shall be divided into a grid shape of about 30 × 30 m.

[0030] Dig pits on the surface of the tailings pond or waste slag pile at an interval of 80cm×80cm, and the size of the pits is 30cm in diameter×30cm in depth. Mix 30kg of foreign soil with 300g of compound fertilizer (N-P-K=15-15-15) and apply it into the above pits.

[0031] Dig the centipede grass seedlings and Miscanthus plants from the s...

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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 field of reclamation, ecological restoration and land restoration of mine abandoned land, namely realizes rapid ecological restoration of arsenic-containing tailings ponds through biotechnology, and eliminates environmental pollution and health threats of the tailings ponds to surrounding areas. Background technique [0002] Arsenic is an ore-forming element, and arsenic is commonly found in non-ferrous metal deposits. Mining and smelting of non-ferrous metals bring arsenic into the environment, causing serious pollution. In the process of mining, beneficiation and smelting, a large amount of waste rock, tailings and smelting waste residues are generated. Because they have not been effectively treated, they are deposited in the mining area, 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 into...

Claims

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Application Information

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Patent Type & Authority Applications(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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