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Method for carrying out purification treatment on acidic mine drainage water of tailing reservoir

A technology for acid mine and purification treatment, which is applied in the treatment of heavy metals in acid mine drainage, and in the field of acid mine drainage purification treatment in tailings ponds, which can solve the problems of excessive load and tailings pond load, and reduce treatment costs and The effect of simple load and process

Active Publication Date: 2018-03-06
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a method for purifying acidic mine drainage of tailings dams, so as to solve the problem of excessive load of tailings dams caused by excessive percolation water load in the prior art, The invention can control the acidic mine drainage of the tailings pond without artificially adding fresh water sources and other chemical neutralizers, so as to realize the purpose of in-situ treatment of the acidic mine drainage of the tailings pond with low energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In Example 1, an existing small tailing pond with percolation water discharge facilities was selected, and the surface acid mine drainage of the tailing pond and the percolation water drain were artificially drained together. The acid mine drainage from the top of the tailings dam was collected in the dry season. The pH of the tested water sample was about 2.34. The ion concentration in the solution was as follows: Al was 71.5mg / L, Fe was 180.31mg / L, Zn was 11.73mg / L, Mn Is 15.33mg / L, Cu is 4.60mg / L, Cd is 70.52ug / L, Pb is 6.97ug / L, Cr is 23.87ug / L and As is 9.78ug / L, collect the percolation water from the bottom of the tailings dam The tested pH is 7.22, and the ion concentration is as follows: Al is 18.21mg / L, Fe is 54.31mg / L, Zn is 0.01mg / L, Mn is 7.12mg / L, Cu is 0.51mg / L, Cd is 0.38 ug / L, Pb are 1.06ug / L, Cr is 0.01ug / L, and As is 5.34ug / L, and the concentration of other ions except for manganese is lower than the environmental emission standard. Mix the acid mine d...

Embodiment 2

[0025] In Example 2, an existing small tailing pond with percolation water discharge facilities is selected, and the surface acid mine drainage of the tailing pond and the percolation water drainage are artificially drained together. The acid mine drainage from the top of the tailings reservoir was collected in the rainy season. The average pH of the tested water samples was 2.65. The iron ion concentration distribution in the solution is as follows: Al is 73.5mg / L, Fe is 200.41mg / L, Zn is 10.15mg / L, Mn Is 16.37mg / L, Cu is 5.60mg / L, Cd is 72.46ug / L, Pb is 7.89ug / L, Cr is 25.41ug / L and As is 9.11ug / L, collect the percolation water from the bottom of the tailings dam The tested pH is 7.24, and the ion concentration is as follows: Al is 17.42mg / L, Fe is 62.34mg / L, Zn is 0.04mg / L, Mn is 8.12mg / L, Cu is 0.45mg / L, Cd is 0.29 ug / L, Pb are 1.12ug / L, Cr is 0.00ug / L and As is 7.89ug / L. Local rainwater was collected for many tests. The average pH of rainwater was 6.10, and the concentrat...

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Abstract

The invention discloses a method for carrying out purification treatment on acidic mine drainage water of a tailing reservoir. According to the method, the acidic mine drainage water generated in a surface layer and a shallow layer of the tailing reservoir is neutralized by utilizing percolating water in a deep layer of the tailing reservoir, so that the pH (Potential of Hydrogen) value of the earth surface acidic mine drainage water of the tailing reservoir is improved and a lot of iron compound sediment is generated and is used for adsorbing other ions in mining area wastewater to realize co-precipitation and the effect of purifying a water body is realized; and finally, water which is discharged to the natural water body from the tailing reservoir reaches environment emission standards.By adopting the method disclosed by the invention, the problem that the deposited water load of the tailing reservoir is too heavy is solved and the acidic mine drainage water also can be treated bylow energy consumption; and meanwhile, in-situ or near-distance treatment of the acidic mine drainage water of the tailing reservoir can be realized. According to the method disclosed by the invention, the purification treatment of the acidic mine drainage water of the tailing reservoir is realized; meanwhile, the environment safety of the tailing reservoir can be improved; the resource utilization of tailings can be realized; and the implementation method has the advantages of simplicity and energy saving and has very high application value and application prospect.

Description

Technical field [0001] The invention relates to a method for purifying and treating acid mine drainage of a tailing pond, in particular to the treatment of heavy metals in acid mine drainage, and belongs to the technical field of mine water treatment and physical treatment of pollutants in the environmental field. Background technique [0002] With the needs of social and economic development, great achievements have been made in mining, but it has also brought great pollution. Tailings ponds are used as places to accumulate beneficiation tailings or other industrial waste residues and are artificial debris flows with high potential. Once the source of danger occurs, it will cause a big environmental accident. Acid mine drainage is a typical and serious pollution caused by tailings ponds. Acid mine drainage is mostly caused by the oxidation of sulfide minerals during the mining of coal and metal resources. Because of its low pH and large amounts of heavy metal ions, it will caus...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F103/10
CPCC02F1/5236C02F2103/10C02F1/66
Inventor 宗美荣陆现彩李娟刘欢向婉丽高磊李萌
Owner NANJING UNIV
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