Method for repairing plants of heavy metal polluted soil

A technology for phytoremediation and contaminated soil, applied in the field of phytoremediation of heavy metal contaminated soil, can solve the problems of mismatching absorption rules, increasing the risk of phytotoxic effect heavy metals infiltrating into the ground, etc. The effect of reducing the cost of treatment and ensuring the quality of seedlings

Active Publication Date: 2019-04-09
ANHUI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In addition, there are certain problems in the existing application methods of activators, mainly in the form of solid particle spreading or flood irrigation
These two application methods do not match the absorption rules of plants, which increases the toxic effect on plants and the risk of heavy metals leaching into the ground

Method used

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  • Method for repairing plants of heavy metal polluted soil
  • Method for repairing plants of heavy metal polluted soil
  • Method for repairing plants of heavy metal polluted soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This example relates to the combined use of heavy metal activators and Sedum sedum. Sedum sedum is widely distributed in central, southern and eastern China. It is a native cadmium and zinc hyperaccumulator plant in my country, and has an enrichment effect on lead. Sedum sedum has the advantages of wide adaptability, perennial, large biomass, asexual reproduction, and harvesting multiple times a year. It has broad application prospects in the field of phytoremediation of heavy metal-contaminated soils in my country.

[0048] The original vegetable planting farmland around a tailings pond in Tongling City, Anhui Province was selected as the target planting site (that is, the heavy metal-contaminated soil to be repaired). The environmental conditions and natural vegetation of the planting site were investigated, and the heavy metal content in the soil was determined. The results are shown in Table 1.

[0049] Table 1 Soil heavy metal content of sampling plot I

[0050] ...

Embodiment 2

[0089] The farmland in the reclamation area of ​​Xinzhuangzi Mine in Huainan City, Anhui Province was selected as the target planting site. The environmental conditions and natural vegetation of the planting site were investigated, and the soil heavy metal content was measured. The results are shown in Table 6.

[0090] Table 6 Heavy metal content in farmland soil of sampling plot II

[0091]

[0092] 1. Phytoremediation method of the present invention

[0093] The phytoremediation method of the present invention was used to carry out a remediation test on the above-mentioned plots, and the specific process was as follows.

[0094] (1) the integrated cultivation of centipede grass, comprises the following steps:

[0095] Preparation of nursery box: prepare multiple rectangular nursery boxes, and each nursery box is divided into two parts: the outer part is the box body, without a cover, and the walls around the box have no holes; the inner part is a hanging seedling tray,...

Embodiment 3

[0131] The farmland around a mining area in Tongling City, Anhui Province was selected as the target planting site. Investigate the environmental conditions and natural vegetation of the planting site, and measure the soil heavy metal content. The results are shown in Table 11.

[0132] Table 11 Heavy metal content in farmland soil of sampling plot III

[0133]

[0134] 1. Phytoremediation method of the present invention

[0135] The phytoremediation method of the present invention was used to carry out a remediation test on the above-mentioned plots, and the specific process was as follows.

[0136] (1) The integrated cultivation of torch cockscomb comprises the following steps:

[0137] Preparation of nursery box: prepare multiple rectangular nursery boxes, and each nursery box is divided into two parts: the outer part is the box body, without a cover, and the walls around the box have no holes; the inner part is a hanging seedling tray, and the seedling trays are evenl...

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Abstract

The invention discloses a method for repairing plants of heavy metal polluted soil. The method comprises the following steps: integrally culturing a heavy metal hyperaccumulator; transplanting to heavy metal polluted soil; dropwise irrigating an activating agent; and removing the hyperaccumulator. The method can be used for effectively improving the effect and efficiency of repairing soil heavy metal plants, reducing the treatment cost and reducing environmental risks including heavy metal percolation and the like.

Description

technical field [0001] The invention belongs to the field of soil improvement, and relates to the restoration of heavy metal-contaminated soil, in particular to a phytoremediation method for heavy metal-contaminated soil. Background technique [0002] The phytoremediation technology of heavy metal-contaminated soil is based on the tolerance and superaccumulation characteristics of plants to heavy metals, and uses superaccumulative plants to absorb, transfer, transform, and accumulate heavy metals in the soil, so as to achieve the purpose of removing heavy metals from the soil. Phytoremediation technology has attracted extensive attention and has become a research hotspot in the field of environmental science because of its advantages of cost-effectiveness, green ecology, environmental friendliness, no significant impact on soil quality, and in-situ remediation on polluted soils, and has broad applications. prospect. [0003] Heavy metal hyperaccumulator plants generally hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 叶新新李虹颖胡宏祥李军利马超柴如山郜红建
Owner ANHUI AGRICULTURAL UNIVERSITY
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