Method for improving repairing efficiency of heavy metal polluted plants

A phytoremediation and heavy metal technology, applied in botany equipment and methods, horticultural methods, horticulture, etc., can solve the problems of reducing the scope of application of metal pollution, increasing the risk of secondary pollution, polluting surrounding water bodies or farmland, etc., and achieving efficiency Improvement, easy to use, and the effect of improving tolerance

Inactive Publication Date: 2015-09-02
SHANGHAI JIAO TONG UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the activation of soil heavy metals will also bring serious negative effects: 1) After activation, soil heavy metals are more likely to diffuse through leaching and other channels, polluting surrounding water bodies or farmland, and increasing the risk of secondary pollution; Heavy metals are more toxic to plants, which can lead to plant poisoning and death, reducing the scope of application of metal pollution that can be used for phytoremediation
In addition, these technologies for activating heavy metals in soil mainly rely on increasing the absorption efficiency of heavy metals by plant roots, rather than directly increasing the accumulation of heavy metals in aboveground stems and leaves of plants. Efficiency, inhibition of plant growth after increased heavy metal toxicity, etc.

Method used

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  • Method for improving repairing efficiency of heavy metal polluted plants
  • Method for improving repairing efficiency of heavy metal polluted plants
  • Method for improving repairing efficiency of heavy metal polluted plants

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Experimental program
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Effect test

Embodiment 1

[0040] Remediation of heavy metal cadmium contaminated soil:

[0041] The soil to be repaired is located in the mining area and has been polluted by tailings and cadmium-containing wastewater for a long time. The average content of heavy metal cadmium in the soil is as high as 102mg / kg. Most plants cannot grow normally on such soil and will die due to cadmium poisoning. Bare, it is very easy to spread and cause serious pollution events to surrounding farmland and water bodies.

[0042] The cadmium pollution in the soil is repaired by planting bluegrass. On the one hand, the cadmium pollution in the soil is gradually removed by harvesting the stems and leaves of the aboveground part of the plant by using the root system of bluegrass to absorb and transport to the aboveground part. On the one hand, bluegrass can also form a lawn cover layer on the surface to avoid the risk of spreading contaminated soil.

[0043] Bluegrass is a perennial turf plant, which has a very strong tole...

Embodiment 2

[0050] Remediation of heavy metal (lead, cadmium, copper) compound polluted soil:

[0051] Phytoremediation of heavy metal pollution in the soil is carried out by planting blue cabbage, which is a cruciferous herb, sown in March and harvested in October. The soil plowing and leveling before sowing and the cultivation and management measures after sowing are the same as the conventional ones. During the growth period of the seedlings, a small amount of irrigation is used to avoid the spread of polluted soil caused by surface runoff caused by excessive irrigation.

[0052] After the seedlings grew to 6 leaves, the plant leaves were sprayed with a restoration accelerator every 15 days, wherein the phosphate root was derived from superphosphate, and its concentration was 0.3wt%, and the concentration of the penetrant JFC was 0.03wt%. After spraying, phosphate ions quickly penetrate into the leaf tissue, and continuously chemically react with the soluble heavy metals in the leaf to...

Embodiment 3

[0057] Remediation of heavy metal polluted water bodies:

[0058] The repair object is the small river in the tailings area, which has been polluted by heavy metal wastewater in the mining area for a long time, and the heavy metal content seriously exceeds the standard. The main heavy metals that exceed the standard include: lead, cadmium, copper, zinc, etc.

[0059] Phytoremediation of heavy metal pollution in the water body by planting water hyacinth on the water surface. Water hyacinth is a floating water plant of the genus Hyacinthaceae. When the temperature reaches above 12°C in spring, plant water hyacinth seedlings in the water body to let the water hyacinth grow in the polluted water. Grow until it completely covers the water surface. When the main stem of the water hyacinth seedling grows the 8th leaf and the coverage of water body plants reaches more than 85%, it begins to spray repair accelerator on the water hyacinth leaf surface every 30 days or so, wherein the ph...

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Abstract

The invention discloses a method for improving the repairing efficiency of heavy metal polluted plants. The method comprises the following steps: growing plants with an enriching or super-enriching ability to heavy metal on heavy metal polluted soil or water; when the main stems of the plants grow leaves, spraying a heavy metal pollution repairing improver on the leaves; removing heavy metal pollutions by harvesting dead leaves of the plants in plant growing season. The method has the advantages that not only can the repairing efficiency of the heavy metal polluted plants be improved, but also heavy metal poisoning the plants can be reduced or removed, and the application range of heavy metal polluted plant repairing is extended.

Description

technical field [0001] The invention belongs to the technical field of remediation of heavy metal environmental pollution, and in particular relates to a method for promoting phytoremediation efficiency of heavy metal polluted soil and water bodies. Background technique [0002] Heavy metal pollution of soil and water has become a very serious environmental problem. According to incomplete statistics, since 2009, there have been more than 30 major heavy metal pollution incidents in China, which have caused immeasurable huge losses. The main methods of remediation of heavy metal pollution are: guest soil method, chemical leaching method, chemical oxidation method, phytoremediation method, etc. Compared with other remediation methods, phytoremediation has the obvious advantages of being more economical, safer, more environmentally friendly, and will not have any negative impact on soil and water bodies. It has become one of the most potential and promising methods in heavy met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G7/06A01G1/00
CPCA01G2/00A01G7/06
Inventor 王兆龙王恺孟德鹏王舒婷董沁
Owner SHANGHAI JIAO TONG UNIV
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