Method for ecological remediation on acid tailing pond

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...

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 agricultural chemical regulation method. The above methods have their own advantages, but they all have problems such as large amount of engineering, high cost, and secondary pollution.

The bioremediation method mainly selects plants with strong resistance, and uses the method of ecological restoration to control the acid tailings pond. Due to the strong acid environment, the seed reproduction cannot survive, and the method of "cultivating first and then transplanting" is generally adopted. However, Whether the transplanted seedlings can adapt to the acidic environment becomes the key factor, the survival rate is low, the effect of repeated transplanting and ecological restoration is slow, time-consuming, and cannot fundamentally solve the problem of underground pollution