Heavy metal pollution stabilized repair material suitable for tailings and waste rock and preparation method of heavy metal pollution stabilized repair material

Abstract

The invention discloses a heavy metal pollution stabilized repair material suitable for tailings and waste rock. The heavy metal pollution stabilized repair material includes an adhesive, a microbialcarrier material, facultative sulfate reducing bacteria, a sludge and straw mixture, sulfates and water. The obtained repair material has the function of slowly releasing a carbon source and sulfur elements through compounding of various materials, natural growth of microorganisms is fully used for continuously providing the microorganisms, reproduction growth of the original environment improvesthe environmental adaptability, formation of biofilms on the ore surface is accelerated, the cost is low, the service life is long, slowly releasing of the carbon source and the sulfur elements is achieved, and the control efficiency of heavy metals can be improved.

Description

technical field [0001] The invention relates to the technical field of mine pollution restoration, in particular to materials suitable for stabilizing heavy metal pollution of tailings waste rocks and a preparation method thereof. Background technique [0002] With the development of the economy, a large number of mines are mined for national production in my country. However, a large number of mines have led to the emergence of a large number of abandoned ores. According to statistics, my country produces nearly 4 billion tons of industrial waste every year, and a large number of tailings ponds continue to emerge. Due to The early disposal was improper, without any anti-seepage, or even piled up randomly. After long-term natural oxidation and rainfall leaching, a large amount of toxic and harmful substances entered the surrounding environment through different paths, affecting the surrounding soil groundwater, residents' drinking water, and ecological security. Environmental ...

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Problems solved by technology

The above two engineering methods have the same problems in the disposal of tailings ponds, with large engineering volume and high capital investment.

In addition, the presence of acidic wastewater will cause a large number of acidophilic oxidizing microbial communities in the pile, which will intensify the generation of acidic wastewater from waste ores.

In addition, after plants absorb heavy metals from the environment, they will accumulate in animals, plants, and humans through the food chain, which is not only harmful to human health, but also seriously endangers the ecological environment.

The chemical disposal method generally uses the addition of chemical agents to achieve the stabilization of sulfur-containing waste ores. However, due to the need to add a large amount of chemical agents, there is a risk of secondary pollution, and it only stabilizes the heavy metal ions in the produced acidic wastewater. can not effectively avoid the generation of acidic wastewater

The microbial treatment method has the advantages of low treatment cost and can remove a variety of heavy metal ions. Some microbial treatment methods are also for the treatment of the acid wastewater that has been produced, and cannot block the problem of acid wastewater produced by the contact of ore with rainwater, oxygen, etc.

Therefore, a multi-layer "microbial film" can be formed on the surface of ore particles through microbial methods, which can not only block the contact between water and ore, reduce the generation of waste water, avoid the continuous dissolution of heavy metals, but also reduce the amount of ore Repair cost, but in the actual project implementation process, a large number of microorganisms need to be continuously replenished to realize the formation of the membrane, so a large amount of artificial replenishment of microorganisms is required, which also increases the cost

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