Method for ecological remediation on acid tailing pond

A technology for ecological restoration and tailings pond, which is applied in the fields of botanical equipment and methods, planting substrates, and restoration of polluted soils. The effect of polluting groundwater and surface water, solving environmental problems, and simple construction methods

Active Publication Date: 2019-03-29
杰瑞(莱州)矿山治理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) Under normal environmental conditions, the surface covered by tailings has been idle for many years, the surface layer is hardened, and there are basically no plants in the storage area. The biomass at the boundary of the storage area has also decreased significantly, and it occupies a large amount of land resources.
[0004] (2) Diffusion of tailings particles: due to the small particle size of tailings, it is not easy to bond during storage, and it is easy to be washed away under the action of hydraulic force, which poses a huge threat to downstream personal safety and the natural environment
Physical and chemical remediation methods include: alien soil method, leaching precipitation method, electrochemistry method, magnetization method and agricult...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1, in a tailings pond in the south, the heavy metals with environmental pollution risks are zinc, arsenic, cadmium, and hexavalent chromium. The area of ​​the test section is selected to be 100 square meters, and the pH of the tailings acidic water is measured to be 3.02, and the conductivity is 1325 μs / cm. Ecological restoration method: (1) remove the acidic water in the tailings; (2) lay anti-corrosion non-woven fabric at 50cm of the tailings; (3) lay a 3cm-thick sealing layer on the anti-corrosion non-woven fabric, sodium humate 10 %, silty clay 45%, calcium carbonate powder 15%, tailings powder 30%; (4) Lay a 5cm thick aquifer on the sealing layer, red loam 15%, tailings powder 50%, decomposed matrix 20% , fly ash 5%, humic acid 5%, water-retaining material 3%, negative polyacrylamide 2%; (5) hydrodynamically sowing a 1cm-thick coated seed layer on the aquifer; (6) artificial maintenance; The measured water permeability coefficient of the sealing layer is ...

Embodiment 2

[0027] Example 2, in a tailings pond in the south, the heavy metals with environmental pollution risks are zinc, arsenic, cadmium, and hexavalent chromium. The area of ​​the test section is selected to be 100 square meters, and the pH of the tailings acidic water is measured to be 3.02, and the conductivity is 1325 μs / cm. Ecological restoration method: (1) remove the acidic water in the tailings; (2) lay anti-corrosion non-woven fabric at 70cm of the tailings; (3) lay a 5cm thick sealing layer on the anti-corrosion non-woven fabric, sodium humate 25 %, silty clay 35%, calcium carbonate powder 5%, tailings powder 35%; (4) lay a 10cm thick aquifer on the sealing layer, red loam 25%, tailings powder 35%, decomposed matrix 24% , 7% of fly ash, 7% of humic acid, 1.5% of water-retaining material, 0.5% of negative polyacrylamide; (5) spraying a 3cm-thick coated seed layer on the aquifer; (6) artificial maintenance; The water permeability coefficient of the sealing layer is measured...

Embodiment 3

[0028] Example 3, in a tailings pond in the south, the heavy metals with environmental pollution risks are zinc, arsenic, cadmium, and hexavalent chromium. The area of ​​the test section is selected to be 100 square meters, and the pH of the tailings acidic water is measured to be 3.02, and the conductivity is 1325 μs / cm. Ecological restoration method: (1) remove the acidic water in the tailings; (2) lay anti-corrosion non-woven fabric at 60cm of the tailings; (3) lay a 4cm thick sealing layer on the anti-corrosion non-woven fabric, sodium humate 12 %, silty clay 37%, calcium carbonate powder 8%, tailings powder 43%; (4) lay a 7cm thick aquifer on the sealing layer, red loam 17%, tailings powder 37%, decomposed matrix 30% , fly ash 8%, humic acid 5%, water-retaining material 2%, negative polyacrylamide 1%; (5) hydraulically spray and sow a 2cm thick coating seed layer on the aquifer; (6) artificial maintenance, The measured water permeability coefficient of the sealing layer...

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Abstract

The invention provides a method for ecological remediation on an acid tailing pond. By removing acids from soil, and by laying nonwoven cloth and a sealing layer, good partitioning is achieved, and byfurther laying a water reservation layer and a coated seed layer, the purpose of re-greening an acid tailing pond is achieved. The method has the beneficial effects that rainwater can be reserved tothe maximum extent, the sealing layer is capable of preventing the rainwater from infiltrating into tailings, the problems of underground water and ground water pollution can be substantially solved,the construction method is simple, and the construction cost is low; by using a seed coating technique, a set of rapid nursery stock breeding technique is formed, a stable ecological remediation system is cultured, the target of completely re-greening woody plants within 90 days is achieved, and environment problems of acid tailing ponds are solved for good.

Description

technical field [0001] The invention relates to the field of mine ecological restoration, in particular to a method for carrying out ecological restoration on an acid tailing pond. Background technique [0002] Tailings are the waste left after the extraction of useful minerals through the crushing, grinding, and sorting of ores in the mine beneficiation production. It can be called tailings slurry. In the existing technology, the tailings slurry produced by ore dressing is generally transported to the tailings storage system through the tailings conveying system for centralized stacking, and the stacked tailings waste is produced. The adverse consequences mainly consist of the following points: [0003] (1) Under normal environmental conditions, the surface covered by tailings has been idle for many years, the surface layer is hardened, and there are basically no plants in the storage area. The biomass at the boundary of the storage area has also decreased significantly, a...

Claims

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Application Information

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IPC IPC(8): A01G17/00A01G24/46A01G24/28A01G24/10A01G24/35A01G24/23A01G24/22A01G24/20B09C1/00
CPCA01G17/005A01G24/10A01G24/20A01G24/22A01G24/23A01G24/28A01G24/35A01G24/46B09C1/105
Inventor 杨建国任广滨梁欢王少光
Owner 杰瑞(莱州)矿山治理有限公司
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