Method for promoting growth of plants on manganese tailing residues

Abstract

The invention relates to a method for promoting growth of plants on manganese tailing residues. Used indigenous bacteria come from the tailing residues on which plants do not grow. Used plants are Phytolacca americana. An inoculated water-retaining gel bacteria bed and the tailing residues are evenly mixed according to a mass ratio being 1: (4-8) to cultivate Phytolacca americana seedlings. The plants can be promoted to grow and breed on the manganese tailing residues to form vegetation. The water-retaining gel bacteria bed contains 5 parts of white mica, 5 parts of montmorillonite, 7 parts of agar and 83 parts of indigenous bacteria culture solution. The indigenous bacteria culture solution contains soluble starch with concentration being 5g / L, beef tallow cream with concentration being 1g / L, peptone with concentration being 3g / L, dipotassium hydrogen phosphate with concentration being 0.2g / L, sodium chloride with concentration being 5g / L, cane sugar with concentration being 3g / L, magnesium sulfate with concentration being 0.2g / L, ferrous sulfate with concentration being 0.2g / L, potassium nitrate with concentration being 0.5g / L, urea with concentration being 10g / L and calcium superphosphate with concentration being 5g / L. The method has the advantages that the operation is simple, the cost is low, the efficiency of resisting and controlling the migration and the diffusion of manganese and other harmful metal in manganese tailing residues, the environment can be beautified and the like.

Description

technical field [0001] The invention relates to the field of environmental biotechnology, in particular to a method for promoting the growth and reproduction of plants in the tailings slag by using the high water-retaining gel bacteria bed and the native bacteria of the tailings pond, increasing the biomass of the plants and improving the efficiency of phytoremediation. Background technique [0002] The mining and smelting of mines have made great contributions to the development of human society, but left waste tailings that are harmful to humans, animals and plants. The long-term stacking of tailings not only takes up a lot of land, but also has a serious impact on the surrounding ecosystem. Due to the lack of nutrients and high content of heavy metals in the tailings after smelting, there is almost no vegetation in the tailings pool in the natural state. Due to the small particle size of mine tailings, tailing sandstorms are likely to occur when the wind blows, and tailin...

AI Technical Summary

Problems solved by technology

However, there are many shortcomings such as high cost and secondary pollution caused by engineering restoration and chemical restoration. Bioremediation technology has become the preferred method for repairing tailings pollution due to its advantages of simple process, low cost, and environmental friendliness.

At present, there are no plants on the surface of many tailings ponds in my country, or there are plants but very few in number, and their growth is slow, and they cannot form vegetation covering the entire tailings wasteland, and the tailings ponds cannot be repaired.

Some plants with large biomass and tolerance to enrichment of heavy metals cannot grow in tailings ponds, so finding a way to promote the growth of plants in tailings ponds is an important part of tailings pond governance

[0003]Research shows that the lack of vegetation in tailing ponds is due to high content of heavy metals, poor water retention, lack of nutrients for plant growth, etc.

Our research has found that there are bacteria in the tailings ponds without growing vegetation, mainly bacteria, molds, actinomycetes, etc., but the number is very small, the growth is slow, and most of them are in a dormant state, which cannot make the tailings ponds suitable for plant growth. environmental changes