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Method for repairing soil heavy metal pollution by synergy of plants, mycorrhiza and earthworm

A collaborative repair and heavy metal technology, applied in the field of soil remediation, can solve the problems of screening and separation of functional microorganisms, the reduction of heavy metal mobility, etc., and achieve the effect of promoting sustainable use and development, high added value, and enhanced remediation effect

Inactive Publication Date: 2015-09-02
BEIJING WO BAO BLUE ENVIRONMENTAL PROTECTION SCI & TECH LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microorganisms can also directly absorb heavy metals and accumulate them in cells, reducing the mobility of heavy metals. However, the screening and isolation of functional microorganisms is the bottleneck of microbial remediation of heavy metals.

Method used

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  • Method for repairing soil heavy metal pollution by synergy of plants, mycorrhiza and earthworm
  • Method for repairing soil heavy metal pollution by synergy of plants, mycorrhiza and earthworm
  • Method for repairing soil heavy metal pollution by synergy of plants, mycorrhiza and earthworm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for plants, mycorrhizae, and earthworms to synergistically repair soil heavy metal pollution, said method comprising inoculating mycorrhizal fungi in soil contaminated by heavy metals, specifically mixing propagules containing Glomus terrestriale with soil, and then inoculating soil Corn was planted in China, and the mycorrhizal fungus was inoculated locally in the soil, and the inoculation amount was 5% (W / W, mycorrhizal fungus / soil). After Glomus superficialis infects the roots of corn to form a mycorrhizal symbiosis system, then inoculate earthworms in the soil at the plant seedling stage (the inoculation time of earthworms is generally 30 days after inoculation of Glomus superficialis) to form a plant-mycorrhizal-earthworm system , to repair the soil. Here, Eisenia chinensis was selected, which was taken from the earthworm breeding base. The soil properties of the earthworm collection site were similar to those of the polluted test site. The propagule cont...

Embodiment 2

[0026] A method for plant, mycorrhizal, and earthworms to synergistically remediate heavy metal pollution in soil. In the method, the inoculum amount of mycorrhizal fungi relative to the soil is 3%, and the time for inoculating earthworms is 33 days after the inoculation of mycorrhizal fungi. The rest are the same as in Example 1.

Embodiment 3

[0028] A method of plant, mycorrhizal, and earthworms synergistically remediating heavy metal pollution in soil. In the method, the inoculum amount of mycorrhizal fungi relative to the soil is 8%, and the time for inoculating earthworms is 27 days after inoculating mycorrhizal fungi. The rest are the same as in Example 1.

[0029] The restoration effect of the plant-mycorrhizal-earthworm system will be described below through specific experiments.

[0030] In this experiment, two different soils, Cd-contaminated soil and Cu-contaminated soil, were selected respectively. The test soils were placed in flower pots and corn was planted. Four treatment methods of earthworms, adding mycorrhizal fungi and earthworms at the same time were tested, and the effects of adding mycorrhizal fungi and earthworms at the same time were compared. At the same time, the normal soil was used as the control group for comparative experiments. A total of three groups of experiments were carried out, ...

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Abstract

The invention refers to the technical field of soil recovery, and particularly relates to a method for repairing soil heavy metal pollution by synergy of plants, mycorrhiza and earthworm. The method comprises the following steps: inoculating mycorrhiza fungi to the soil polluted by heavy metal, and then planting specific plants in the soil; at last, inoculating earthworm in the soil at the seedling stage of the plant, and forming a plants-mycorrhiza-earthworm system; repairing the soil. By adopting the plants-mycorrhiza-earthworm system, the technology of repairing soil heavy metal at an original position and a fixed point is established, and the purpose of repairing the farmland soil heavy metal pollution can be realized. The earthworm can improve the infection rate of the mycorrhiza, so as to enhance the repairing function of the mycorrhiza on the heavy metal polluted soil, lighten soil pollution and protect the farm crops from being polluted; and thereby, human health is protected; besides, the method is low in investment, easy to master the technology, high in product additional value, quick in investment return, and very suitable for our actual condition, and can better promote the soil sustainable use and development.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a method for synergistically remediating soil heavy metal pollution by plants, mycorrhizae and earthworms. Background technique [0002] Soil is the material basis for human survival, an indispensable and non-renewable natural resource for human beings, and an important part of the human environment. Soil pollution has been called "invisible pollution". As the main receiving place for heavy metals, the heavy metals contained in the soil are enriched by plants and animals in large quantities, and enter the human body through the food chain. If you eat grain, oil and its products contaminated by heavy metals for a long time, it will have certain adverse effects on the human body. Over 10 million tons of grains are reduced each year due to heavy metal pollution, and 12 million tons of grains are polluted by heavy metals every year. The total economic loss is at least 20 b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/10
Inventor 付举玺曹平
Owner BEIJING WO BAO BLUE ENVIRONMENTAL PROTECTION SCI & TECH LIMITED
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