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High-yield planting method of Taraxacum brassicaefolium for heavy metal remediation

A heavy metal and dandelion technology, applied in the field of contaminated soil remediation, can solve problems such as difficult absorption and enrichment of dandelion, influence of dandelion remediation effect, complex types of pollutants, etc., and achieve the effect of maintaining loose soil, high practical value, and improving remediation rate

Inactive Publication Date: 2019-11-12
迪天环境技术南京股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex types of pollutants in most heavy metal-polluted soils, the enrichment effect of dandelion on other types of pollutants in soil is limited, which limits its application.
[0004] In addition, chromium mainly exists in the form of Cr(III) and Cr(VI) in soil, and Cr(III) mainly exists as Cr(H 2 O) 6 3+ , Cr(OH) 2+ , CrO 2- The form exists in soil minerals, has strong stability, and is easily absorbed by soil colloids or forms precipitates, thereby being absorbed and enriched by dandelion; while Cr(VI) is highly active, unstable, and easily soluble in water, usually in the form of Cr 2 o 7 2- and CrO 4 2- The form exists in the soil, because it is not easy to be absorbed and enriched by dandelion, which will affect the repair effect of dandelion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A high-yield planting method of dandelion with large leaves for heavy metal restoration, comprising the following steps:

[0040] (1) Set up an isolation layer: set up an isolation layer at a depth of not less than 40cm below the surface to avoid groundwater pollution caused by infiltration of heavy metals in the soil;

[0041] (2) Passivation and fixation: add passivation agent to heavy metal contaminated soil, plow evenly, and react for 15 to 20 days;

[0042] (3) Activate the soil: add biological activators to the passivated soil, plow evenly, keep the soil humidity at 40%-50%, and activate for 15-20 days;

[0043] (4) Cultivation of crops: the soil is raised up, and big-leaved dandelions are planted on the top of the top, and marigolds are planted in the gully between the top and bottom;

[0044] (5) Animal assistance: put earthworms into the soil after the emergence of dandelion and marigold.

[0045] First of all, the isolation layer under the surface is used to...

Embodiment 2

[0056] A high-yield planting method of dandelion with large leaves for heavy metal restoration, comprising the following steps:

[0057] (1) Set up an isolation layer: set up an isolation layer at a depth of not less than 40cm below the surface to avoid groundwater pollution caused by infiltration of heavy metals in the soil;

[0058] (2) Passivation and fixation: add passivation agent to heavy metal contaminated soil, plow evenly, and react for 15 to 20 days;

[0059] (3) Activate the soil: add biological activators to the passivated soil, plow evenly, keep the soil humidity at 40%-50%, and activate for 15-20 days;

[0060] (4) Cultivation of crops: the soil is raised up, and big-leaved dandelions are planted on the top of the top, and marigolds are planted in the gully between the top and bottom;

[0061] (5) Animal assistance: put earthworms into the soil after the emergence of dandelion and marigold.

[0062] The passivating agent described in step 2 includes the followi...

Embodiment 3

[0070] A high-yield planting method of dandelion with large leaves for heavy metal restoration, comprising the following steps:

[0071] (1) Set up an isolation layer: set up an isolation layer at a depth of not less than 40cm below the surface to avoid groundwater pollution caused by infiltration of heavy metals in the soil;

[0072] (2) Passivation and fixation: add passivation agent to heavy metal contaminated soil, plow evenly, and react for 15 to 20 days;

[0073] (3) Activate the soil: add biological activators to the passivated soil, plow evenly, keep the soil humidity at 40%-50%, and activate for 15-20 days;

[0074] (4) Cultivation of crops: the soil is raised up, and big-leaved dandelions are planted on the top of the top, and marigolds are planted in the gully between the top and bottom;

[0075] (5) Animal assistance: put earthworms into the soil after the emergence of dandelion and marigold.

[0076] The isolation layer described in step 1 is a dense isolation l...

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PUM

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Abstract

The invention belongs to the technical field of contaminated soil remediation, and particularly relates to a high-yield planting method of Taraxacum brassicaefolium for heavy metal remediation. The method comprises the following steps: isolation layer laying, passivation and fixation, soil activation, planting, and animal modification treatment. According to the method disclosed by the invention,various remediation methods are comprehensively utilized, so that the dandelion macrophylla is high in heavy metal remediation rate and has a relatively good effect of improving the heavy metal contaminated soil. The method can achieve high-yield planting of the Taraxacum brassicaefolium and has high practical value and wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of remediation of polluted soil, and in particular relates to a high-yield planting method of large-leaf dandelion for heavy metal remediation. Background technique [0002] Soil is an important resource for agricultural production. Agricultural product quality and safety issues and mass incidents caused by heavy metal pollution in farmland soil are increasing year by year, which is an important livelihood issue. Phytoremediation has the advantages of low cost and low secondary pollution, and is one of the most promising restoration methods for farmland soil restoration. Phytoremediation technology is to transfer and store heavy metals to the stems and leaves of plants after being absorbed by the roots of hyperaccumulators, and to remove heavy metal elements from the soil by harvesting the stems and leaves. The mechanism of phytoremediation is as follows: ① Root activation and absorption of heavy metals, pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B09C1/00B09C1/10
CPCB09C1/00B09C1/08B09C1/105
Inventor 秦丰林王帘里汪一潭
Owner 迪天环境技术南京股份有限公司