Plant method for long-acting three-dimensional treatment of water body with heavy metal pollution

Abstract

The invention discloses a plant method for long-acting three-dimensional treatment of water body with heavy metal pollution. The method comprises the following steps: target plants at least comprise Spriodela polyrrhiza and Myriophyllum verticillatum; cultivation in independent clean water body or direct collection in enrichment regions of plants can be respectively selected; Myriophyllum verticillatum is transplanted in sediments of polluted water bodies with space of 1-1.5m from April to August, and Spriodela polyrrhiza is transplanted to the surface of the polluted water bodies from April to August, wherein the cover area of Spriodela polyrrhiza is 5-8% of the area of the water bodies; Spriodela polyrrhiza and Myriophyllum verticillatum are used for cleaning heavy metal ions in the water bodies and sediments by using hyperenrichment effects for heavy metal ions; Spriodela polyrrhiza and Myriophyllum verticillatum employ nitrogen and phosphor elements, and solid the elements into composition materials of the self-structure, in order to provide dissolved oxygen for water bodies; when the area of Spriodela polyrrhiza is 30-50% of the superficial area of the water bodies, Spriodela polyrrhiza is fished out, 70-80% of Myriophyllum verticillatum which is planted in the year is collected in November is collected, the plants which enrich heavy metals are chopped and dried, and heavy metal elements which can be reused are extracted by a chemical mode.

Description

technical field [0001] The invention relates to the field of heavy metal prevention and control, in particular to a plant method for long-term three-dimensional treatment of heavy metal-polluted water bodies. Background technique [0002] Water body is one of the main natural resources that human beings rely on for survival, and it is also an important part of the human ecological environment, as well as a reservoir of material biogeochemical cycles, which has certain sensitivity to the environment. Due to the impact of human activities, more and more pollutants enter the water environment, and these pollutants have caused many problems to the environment and human health. Especially with the development of mining, smelting, chemical industry, electroplating, electronics, tanning and other industries, as well as unreasonable landfill and stacking of civil solid waste, accidental discharge of heavy metal pollutants, and the application of a large amount of chemical fertilizer...

AI Technical Summary

Problems solved by technology

[0003] Among the relevant patents that have been applied in China, the patent "Method for removing heavy metals in water by using plant biomass composite adsorbent" (application number: 201210018022.1, publication date: 2012-07-18) discloses a method of using chestnut peel, rice straw, The mechanical mixture of biomass on the cattail ground is used as a heavy metal adsorbent to treat water bodies, but since all dead plants are used, the purpose of long-term treatment cannot be achieved. At the same time, there is no other improvement effect on the environment, and even it will It can lead to eutrophication of water body or cause secondary pollution. On the other hand, this invention has no way to remove heavy metals in sediment; the patent "Plant material adsorbent-waterworm bio-combined method for removing heavy metal pollutants in landscape water and Its device" (application number: 200910053865.3, publication date: 2009-11-18) discloses a kind of food that uses wheat bran, chaff, corn or corncob as aquatic worm palatable food, and utilizes wheat bran, chaff, corn or corn The core absorbs heavy metals and then puts the heavy metals into the body of aquatic worms by eating them, and then takes the aquatic worms out of the water body to control the water body. However, this method can only be applied to the treatment of small-scale stagnant water or landscape water, and cannot be applied to flowing waters. , In addition, the types of heavy metals adsorbed are relatively single, and the heavy metals adsorbed cannot be recycled, and the treatment cost is high and does not produce economic effects