A method of mineralizing and cementing uranium tailings by using montmorillonite/carbonate mineralizing bacteria

Abstract

The invention discloses a method for mineralizing and cementing uranium tailing slags through montmorillonite / carbonate mineralization bacteria. The method comprises the following steps that through stress induction and irradiation methods, carbonate mineralization strains are screened and domesticated; culture for the efficient screened and domesticated carbonate mineralization bacteria is enlarged to obtain a high-concentration bacterial solution; a test of using the carbonate mineralization bacteria to cooperate with montmorillonite for cementing the uranium tailing slags is developed, andporosity, compressive strength, permeability coefficient and radiation performance parameters of the mineralized uranium tailing slags are detected. The method for mineralizing and cementing the uranium tailing slags through the montmorillonite / carbonate mineralization bacteria has the advantages that the uranium tailing slags can be more effectively subjected to in-situ closing and cured, radon gas migration and diffusion which are caused by disintegration of harmful metal ions and radioactive elements in the uranium tailing slags are blocked from the source, and the curing effect is furtherimproved.

Description

technical field

[0001] The invention belongs to the field of solidification treatment of radioactive waste, and in particular relates to a method for mineralizing and cementing uranium tailings slag by utilizing montmorillonite / carbonate mineralization bacteria. Background technique

[0002] Environmental pollution has always been a huge problem faced by human beings. Among them, the pollution of the environment by the mining and smelting industry is one of the serious sources of pollution. However, to a large extent, people only pay attention to the environmental pollution caused by the smelting process, and often ignore minerals. Impact of residues on the environment.

[0003] Uranium tailings are loose deposits with large porosity and poor water and air tightness. Under the leaching and percolation of atmospheric precipitation and surface diving, harmful metal ions are more likely to enter surface water and shallow groundwater or Radon produced by the decay of radioactiv...

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