Embedded dual restorer for heavy metal soil improvement

Abstract

The invention discloses an embedded dual restorer for heavy metal soil improvement, and belongs to the technical field of soil restoration, a microbial soil restoration agent can be periodically injected into an improver embedding box through cooperation of the improver embedding box and a plurality of U-shaped seepage rods, and the microbial soil restoration agent is guided into soil from a plurality of filter holes in the U-shaped seepage rods, so the diffusion balance degree of the microbial soil adsorbent is effectively improved; the microbial soil remediation agent has the effects of directly or indirectly improving soil, restoring soil fertility, preventing soil-borne diseases, maintaining rhizosphere microflora balance, degrading toxic and harmful substances and the like, and is matched with the attapulgite buried rod arranged on the outer side of the U-shaped material seeping rod; the attapulgite buried rod is matched with a plurality of heavy metal adsorption balls arranged outside the attapulgite buried rod in a sleeving mode, so the effects of gathering, adsorbing and passivating heavy metal in soil are achieved; the operation is easy, convenient and feasible, the improvement and adsorption are combined, and the remediation effect on the heavy metal soil is effectively improved to a certain degree.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to an embedded double remediation device for heavy metal soil improvement. Background technique [0002] Soil heavy metal pollution is due to human activities. Heavy metal elements refer to metals with a specific gravity equal to or greater than 5.0, such as Fe, Mn, Zn, Cd, Hg, Ni, Co, etc. The content of heavy metal elements in soil exceeds the background value , The excessive content caused by excessive deposition is collectively referred to as soil heavy metal pollution. Heavy metal pollution in farmland soil is extremely harmful. Heavy metal pollution in soil will not only reduce crop yield and quality, but also enter the human body through the soil-plant system and the food chain, endangering human health and life safety. Heavy metal pollutants have very little mobility in the soil. Once they enter the soil, they will stay in the cultivated layer for a long time. They...

AI Technical Summary

Problems solved by technology

However, heavy metal pollution in farmland soil is extremely harmful. Heavy metal pollution in soil will not only reduce crop yield and quality, but also enter the human body through the soil-plant system and the food chain, endangering human health and life safety.

Heavy metal pollutants have very little mobility in the soil. Once they enter the soil, they will stay in the cultivated layer for a long time. They are not easy to be leached with water, and they can easily enter the human body through the food chain. The potential harm is extremely great.

[0003] Traditional soil heavy metal pollution remediation methods, such as landfill, leaching, and electrochemical methods, require a large amount of engineering. Through a series of reactions such as adsorption, complexation, precipitation, redox, and ion exchange, the bioavailability and availability of heavy metals are reduced. Mobility, to achieve the purpose of reducing the content of heavy metals in soil, but this traditional restoration method is expensive and difficult to use on a large scale

At present, porous medium particles are mostly used as soil remediation agents, and some soil remediation agents are added at a certain depth below the soil surface to absorb heavy metal elements from the upper soil moisture, and to a certain extent block the heavy metal elements from entering the soil. The way of deep soil transportation, and it is also easy to collect and replace, but due to the small mobility of heavy metal pollutants in the soil, the adsorption process with adsorbents is long, and the adsorbents are distributed in a dispersed manner, and it is difficult to restore the soil evenly. Has certain soil remediation limitations

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