Enriching and transformation ditch device of protection forest for removal of farmland heavy metals

Abstract

The invention belongs to the technical field of in-situ removal of heavy metal pollution of farmland soil environments, and discloses an enriching and transformation ditch device of a protection forest for removal of farmland heavy metals. The enriching and transformation ditch device comprises blind pipes, a water collecting settlement pool ditch, an enriching and transformation island and forest trees, wherein the blind pipes are used for draining the soil spraying water; the enriching and transformation island is built by an enriching and transformation box; the enriching and transformation box sequentially comprises a soil bearing layer, a water permeating filtering layer and a filtering material layer from top to bottom. The enriching and transformation ditch device has the characteristics that the heavy metal pollution of the soil can be efficiently recovered in an in-situ way within the larger range, the heavy metal is enriched and transformed to a wood production terminal, and the problems of secondary pollution and food safety are solved; the advantages of land saving, water saving, energy saving, material saving and farmland sustained ecological growth maintaining are realized; the enriching and transformation ditch device is used as an all-in-one facility for the basic construction of farmland forest nets (islands) and irrigation farmlands, and is also used as an important device for realizing multiple functions, such as basic construction of the farmlands, improving of the small climate of the farmlands, and realizing a wood production base.

Description

technical field [0001] The invention belongs to the technical field of in-situ removal of soil heavy metal pollution in farmland environment, and in particular relates to a shelterbelt enrichment and conversion ditch device for removing farmland heavy metals. Background technique [0002] As my country is a country with severe water shortage, coupled with rapid economic development and population base increase, as well as the low quality of the industrial and agricultural population and lax supervision or lack of law enforcement, the lack of surface water resources is seriously polluted and the shortage of water resources is exacerbated. To become a polluted and water-deficient country, it is inevitable to irrigate with sewage containing heavy metals. [0003] According to the soil environment monitoring survey of the Ministry of Agriculture, among the 320 key pollution areas with rapid development in 24 provinces and cities in my country, the planting area of ​​agricultural ...

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Problems solved by technology

[0004] At present, according to the different methods and principles used in the remediation technology of soil heavy metal pollution, there are usually two main ways to control soil heavy metals: ① Change the existing form of heavy metals in the soil to make them fixed, thereby reducing their migration in the environment However, in a wide range of natural and variable environmental factors, as long as the soil heavy metals that have been changed in form still exist, it is difficult to ensure that there is no reverse reaction, and there is still a potential threat of rebound; ② from the soil remove heavy metals

Although the methods and remediation technologies for removing heavy metals from soil have their own advantages and disadvantages, and can solve the existing local heavy metal pollution in soil in stages, they have many shortcomings and limitations from the perspective of sustainable long-term and large-scale in-situ remediation. sex

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