Remediation device and remediation method for arsenic pollution in mine soil

Abstract

The invention relates to a remediation device and a remediation method for arsenic pollution in mine soil. The remediation device is characterized by comprising a pipeline, a reflective plate and a heat-preserving layer, wherein the pipeline has a transparent structure; the end wall of the lower side of the pipeline is provided with a plurality of water holes at intervals; the end surface of the bottom part of the pipeline is provided with at least one permeation pipe; the heat-preserving layer is arranged on the outer wall of the pipeline; the inner wall of the pipeline is provided with the reflective plate; the bottom part of the pipeline is inserted into soil; humus is placed into soil located in the pipeline; the interior of the pipeline forms a greenhouse space; the pipeline is inserted into the mine soil; sunlight is irradiated on the pipeline; the reflective plate can realize uniform irradiation of the sunlight in the pipeline; through cooperation of the reflective plate locatedon the inner wall of the pipeline, the greenhouse space is formed in the the pipeline to provide a good environment for survival and reproduction of microorganisms; Pteris vittata is planted at the outer side of the pipeline; and through combination of two manners of microbial remediation and phytoremediation, the remediation effect of the arsenic pollution in the mine soil is improved.

Description

technical field [0001] The invention relates to a repairing device, in particular to a repairing device and a repairing method for arsenic pollution in mine soil. Background technique [0002] Arsenic is a carcinogenic and toxic metalloid element. Its main valence states include zero valence, trivalent, and pentavalent. In nature, arsenic is an inorganic compound (arsenic trioxide, arsenite, arsenic pentoxide, arsenate) It exists in two forms of organic compounds (methyl arsenic, dimethyl arsenic, trimethyl arsenic, etc.), and its main forms are two soluble salts of arsenate As(Ⅴ) and arsenite As(Ⅲ). Because arsenic is widely used in pesticides, preservatives and herbicides, and in the mining and smelting of arsenic-containing ores, a large number of arsenic-containing compounds enter the soil, causing arsenic-polluted soil problems of varying degrees in many areas. [0003] At present, the remediation and control of arsenic pollution in mines mainly includes underground ba...

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Problems solved by technology

[0003] At present, the remediation and control of arsenic pollution in mines mainly includes underground backfilling, surface landfilling and bioremediation. A single underground backfilling is generally based on the mining planning and process design of the mine. Instead of stockpiling on the surface, it is directly transported to the underground by a special transportation line for backfilling. This method requires the design of the waste rock backfilling method at the beginning of mining, which requires a high investment. Surface filling requires a dedicated landfill, and it is generally chosen to be far away from the village. , Residential canyons need to invest a lot of manpower, material resources and financial resources, surface landfill will also occupy a lot of land, and pose a potential threat to the surrounding ecology and environment, the traditional restoration of arsenic pollution in mines does not use two or more The combination of two methods is used for repairing, the repairing effect is poor, the effect on the solidification mine is minimal, and the practicability is not strong

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