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Method for biology synergistic repairing of farmland heavy metal polluted soil

A technology of contaminated soil and collaborative restoration, applied in the field of soil restoration, can solve problems such as being easily affected by climate and soil environment, large amount of physical and chemical methods, and decreased soil fertility, etc., to achieve enhanced biological effectiveness, broad application prospects, and restoration short cycle effect

Inactive Publication Date: 2017-09-15
方建波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is aimed at the current common heavy metal contaminated soil remediation technology, the physical and chemical method has a large amount of work, high investment, and is easy to damage the soil structure, causing a decrease in soil fertility and causing secondary pollution, while the biological remediation method repairs The effect is poor, the enrichment of heavy metals is limited, and the defect of being easily affected by climate and soil environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] Weigh 40g each of the seeds of Elymus thaliana, A. paniculata, Brassica thaliana, and Duckweed, soak them in warm water at 35°C for 8 hours, and put them into an indoor seedbed to grow seedlings at 35°C. After the seedlings grow 2 true leaves, remove them from the seedbed Dig the seedlings from the soil, wash and remove the root soil with deionized water, and then transplant the seedlings in the optimal pot; spray 10mL of nutrient solution to the seedlings transplanted into the optimal pot every day, and after standing for 25 days, stop spraying the nutrient solution to improve Be that 200mg / L lead acetate solution is drenched mass concentration, control sprinkling amount is 10mL / day, after cultivating like this 15 days, stop drenching lead acetate solution and change sprinkling mass concentration into 200mg / L copper nitrate solution, control sprinkling amount is 10mL / day, after continuing to cultivate for 15 days, stop spraying copper nitrate solution and change to spr...

example 2

[0029] Weigh 30g each of the seeds of Elymus thaliana, A. paniculata, Brassica thaliana, and Duckweed, soak them in warm water at 20°C for 6 hours, and put them into an indoor seedbed to grow seedlings at 25°C. After the seedlings grow 2 true leaves, remove them from the seedbed Dig the seedlings from the soil, wash and remove the root soil with deionized water, and then transplant the seedlings in the optimal pot; spray 5mL nutrient solution to the seedlings transplanted into the optimal pot every day, and after standing for 20 days, stop spraying the nutrient solution to improve Be 200mg / L lead acetate solution for drenching mass concentration, control drenching amount is 5mL / day, after cultivating 15 days like this, stop drenching lead acetate solution and change drenching mass concentration into 200mg / L copper nitrate solution, control drenching amount is 5mL / day, after continuing to cultivate for 15 days, stop spraying copper nitrate solution and change to spraying mass c...

example 3

[0031] Weigh 35g each of the seeds of Elymus thaliana, A. paniculata, Brassica thaliana, and Duckweed, soak them in warm water at 30°C for 7 hours, and then put them into an indoor seedbed to grow seedlings at 32°C. After the seedlings grow 2 true leaves, remove them from the seedbed Dig the seedlings from the soil, wash and remove the root soil with deionized water, and then transplant the seedlings in the optimal pot; spray 7mL nutrient solution to the seedlings transplanted into the optimal pot every day, and after standing for 22 days, stop spraying the nutrient solution to improve Be 200mg / L lead acetate solution for drenching mass concentration, control drenching amount is 7mL / day, after cultivating 15 days like this, stop drenching lead acetate solution and change to drench mass concentration and be 200mg / L copper nitrate solution, control drenching amount is 7mL / day, after continuing to cultivate for 15 days, stop spraying copper nitrate solution and change to spraying...

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Abstract

The invention relates to a method for biology synergistic repairing of farmland heavy metal polluted soil and belongs to the technical field of soil repairing. The method comprises the steps that plants which can survive in the soil with high heavy metal concentration are inductively screened out at first; then a component having the capacity of chelating metal ions is extracted from traditional Chinese medicine, the complexing performance of the extract is further improved with the assistance of organic carboxylic acid in grape fermentation broth, and a metal activating agent is obtained; nutrients are provided for growth of the plants through fermentation residues and traditional Chinese medicine residues, and the heavy metal ions in the soil are made to form a soluble chelate through the synergistic effect of preferred plant exudates and the metal activating agent, so that the accumulation amount of preferred plant root systems on heavy metal is increased; and field mice are put to eat the rich root systems of the preferred plants in the soil finally, and soil heavy metal pollution repairing can be completed after the field mice are repelled through irrigation. According to the method for biology synergistic repairing of the farmland heavy metal polluted soil, the accumulation amount of the plant root systems on the heavy metal is increased through the synergistic effect of different biology; in addition, the repairing cycle is short; and the method has wide application prospects.

Description

technical field [0001] The invention relates to a method for biological synergistic restoration of farmland heavy metal polluted soil, belonging to the technical field of soil restoration. Background technique [0002] With the massive development and utilization of mineral resources, the rapid development of industrial production and the widespread use of various chemical products, pesticides and fertilizers, pollutants containing heavy metals enter the environment through various channels, causing soil, especially farmland soil, to become increasingly polluted by heavy metals . Heavy metal pollutants cannot be chemically or biologically degraded, easily accumulate in plants, animals and humans through the food chain, and are highly toxic, posing a serious threat to the ecological environment, food safety and human health. Therefore, heavy metal pollution in farmland soil has become an increasingly serious environmental problem, and its pollution sources and remediation te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/08
CPCB09C1/105B09C1/08
Inventor 李小兰林晨
Owner 方建波
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