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Ecological restoration method suitable for heavy metal contaminated soil in multiple regions

A technology of polluted soil and ecological restoration, applied in the restoration of polluted soil, reduction of agricultural gas emissions, etc., can solve problems such as long-term environmental pollution, secondary pollution, plant and human health hazards, etc., to improve soil fertility and meet growth needs Effect

Active Publication Date: 2020-01-10
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heavy metals cannot be degraded by microorganisms. They are long-term and potential pollutants in the environment. They are easy to affect the ecological structure and functional stability of soil, and will cause certain harm to plants and human health.
At present, the treatment of heavy metal pollution mostly uses chemical remediation agents or removal of heavy metal-contaminated soil on the surface, which is effective quickly, but it is easy to cause secondary pollution

Method used

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  • Ecological restoration method suitable for heavy metal contaminated soil in multiple regions
  • Ecological restoration method suitable for heavy metal contaminated soil in multiple regions
  • Ecological restoration method suitable for heavy metal contaminated soil in multiple regions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Such as figure 1 As shown, an ecological restoration method suitable for heavy metal-contaminated soil in multiple regions, including:

[0074] In February of that year, grass seeds were sprayed on the upper soil of the land to be repaired, and the spraying rate of grass seeds was 3g / m 2 ;

[0075] Mix dry pond mud, crushed crop straw and vermicompost according to the weight ratio of 3:2:1 to obtain mixture I, and then spread the mixture I evenly on the surface of the land to be repaired, spray water, water spray The water content in the soil layer with a depth of 10cm is 40% of the maximum water content of the soil; first spray grass seeds to cover the surface of the soil with vegetation and improve the water retention rate of the soil surface; in this plan Grass seeds are bahia grass or bluegrass;

[0076] The grass seeds are one or a mixture of grass seeds selected from bahiagrass, bluegrass, tall fescue, ryegrass and purple fescue;

[0077] In June of that year,...

Embodiment 2

[0124] Such as figure 1 , an ecological restoration method applicable to heavy metal-contaminated soil in multiple regions, including:

[0125] In late February of that year, grass seeds were sprayed on the upper soil of the land to be repaired, and the spraying rate of grass seeds was 3.5g / m 2 ;

[0126] Mix dry pond mud, crushed crop straw and vermicompost according to the weight ratio of 3:2:1 to obtain mixture I, and then spread the mixture I evenly on the surface of the land to be repaired, spray water, water spray The water content in the soil layer with a depth of 10cm is 41% of the maximum water content of the soil; firstly, grass seeds are sprayed to cover the surface of the soil with vegetation and improve the water retention rate of the soil surface; in this scheme Grass seeds are bahia grass or bluegrass;

[0127] The grass seeds are one or a mixture of grass seeds selected from bahiagrass, bluegrass, tall fescue, ryegrass and purple fescue;

[0128] In June of...

Embodiment 3

[0167] Such as figure 1 , an ecological restoration method applicable to heavy metal-contaminated soil in multiple regions, including:

[0168] In March of that year, grass seeds were sprayed on the upper soil of the land to be repaired, and the spraying rate of grass seeds was 4g / m 2 ;

[0169] Mix dry pond mud, crushed crop straw and vermicompost according to the weight ratio of 3:2:1 to obtain mixture I, and then spread the mixture I evenly on the surface of the land to be repaired, spray water, water spray The water content in the soil layer with a depth of 10cm is 43% of the maximum water content of the soil; first spray grass seeds to cover the surface of the soil with vegetation and improve the water retention rate of the soil surface; in this scheme Grass seeds are bahia grass or bluegrass;

[0170] The grass seeds are one or a mixture of grass seeds selected from bahiagrass, bluegrass, tall fescue, ryegrass and purple fescue;

[0171] In June of that year, remove ...

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Abstract

The invention discloses an ecological restoration method suitable for heavy metal contaminated soil in multiple regions. The method comprises: in February to March of the same year, spraying grass seeds on a to-be-remediated plot; in June, removing the stem and leaf parts of the grass, and reserving the roots; applying an organic compound fertilizer I in early July and middle July, and then carrying out shallow plowing; carrying out inter-planting of leguminous plants and alfalfa in the last ten-day period of July; in August, applying an organic compound fertilizer II; in November, removing the stem and leaf parts of the leguminous plants and the alfalfa, and reserving the roots; from December to January of the next year, applying an organic compound fertilizer III, and carrying out deep plowing; in March, carrying out drill sowing of Platycladus orientalis; removing relatively thick and strong Platycladus orientalis seedlings with soil from March to April of the third year; after soilis taken on site, uniformly doping with a heavy metal curing agent and crushed remaining Platycladus orientalis seedlings, and uniformly spraying on the plot; and transplanting the Platycladus orientalis seedlings with the soil back to the plot covered with the new soil, and feeding earthworms. The method of the invention can restore the inherent ecological environment of soil while adsorbing andstabilizing heavy metals so as to improve the soil fertility.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to an ecological restoration method applicable to heavy metal polluted soil in multiple regions. Background technique [0002] Heavy metal pollution is one of the most widely polluted and most harmful environmental problems in today's soil pollution. Soil heavy metal pollution sources mainly include the discharge of "three wastes" produced by industries such as chemical industry, electroplating, electronics and tanning, mining and smelting of mines, application of chemical fertilizers and pesticides, discharge of urban domestic waste, sewage irrigation and sludge agricultural use, etc. Heavy metals cannot be degraded by microorganisms. They are long-term and potential pollutants in the environment. They are easy to affect the ecological structure and functional stability of soil, and will cause certain harm to plants and human health. At present, the treatment of heavy met...

Claims

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Application Information

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IPC IPC(8): B09C1/00
CPCB09C1/00B09C2101/00Y02P60/20
Inventor 张运兴翟飞飞李静李海栋刘龙王同文
Owner HENAN POLYTECHNIC UNIV
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