Method for controlling mine heavy metal flushing pollution by using humification product

Abstract

The invention discloses a method for controlling mine heavy metal flushing pollution by using a humification product, which comprises the steps of (1) carrying out mixed fermentation on sludge and extreme thermophilic strains to promote generation of polar humification groups, and then carrying out mixed fermentation on the fermented materials and primary substances of humus precursors to induce generation of a large amount of humus, until the humus content reaches the standard requirement; and (2) mixing and maintaining the sludge humification product reaching the standard and the heavy metal polluted mine soil, and repairing the polluted mine. According to the invention, the humification product is used for absorbing and enriching heavy metal polluted on the surface layer of the mine, complexing of copper, cadmium, chromium, lead, nickel, arsenic and zinc can be increased by 20-85%, the remarkable heavy metal absorbing and enriching effect is achieved, after the humification product enriches the heavy metal, the heavy metal is induced to migrate on primary mineral of the mine and mineralized to generate secondary mineral, and free heavy metals are fixed on the primary mineral, so that the problem of heavy metal flushing pollution of the mine is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of organic solid waste treatment and resource utilization, and in particular relates to a method for using humified products in the pollution control of heavy metal leaching in mines. Background technique [0002] The heavy metal resources in the mine are rich and various, with the characteristics of wide distribution and large reserves. Mining has brought abundant resources and benefits to human beings, but large-scale mining activities have also caused serious damage to the environment. After mining, exposed mines, waste rock dumps, subsidence areas and other industrial and mining areas containing high concentrations of heavy metals, after long-term natural oxidation, rain erosion, and weathering of solid mine waste, the heavy metals in the mines will enter the environment in various chemical forms. Or ecosystems, and heavy metals are not biodegradable, so they will migrate and gradually accumulate in the...

AI Technical Summary

Problems solved by technology

However, the passivation effect of general soil amendments on heavy metals is limited, and can only play a temporary inhibitory role, and bioaccumulation will occur if the time is too long

However, the process of phytoremediation is more complicated. In the process of extracting heavy metals, it is necessary to change the heavy metals into soluble and free states and then collect them by leaching. This process will also cause secondary pollution.

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