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Application of prince's-feather in remediation of heavy metal cadmium pollution in soil

A technology for remediating soil and amaranth seeds, which is applied in the restoration of polluted soil and other directions, can solve the problems of slow growth of cadmium-enriched plants, slow growth of repaired plants, and small aboveground biomass, so as to achieve no secondary pollution and control Permanent effect, the effect of promoting stem and leaf growth

Inactive Publication Date: 2018-12-21
湖南省园林建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the cadmium-enriched plants found so far grow slowly, the plants are short, and the aboveground biomass is small, which is limited in practical application.
Therefore, to find other cadmium-enriched plants to overcome the shortcomings of slow growth and short plants of existing restoration plants, and to cultivate varieties with rapid growth, high plant height and large biomass is the primary problem to be solved by phytoremediation technology of cadmium-contaminated soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The application of the grain amaranth of the present embodiment in repairing soil heavy metal cadmium pollution, the concrete way is:

[0027] On May 1, seedlings planted under natural conditions were used to plant Amaranthaceae Amaranthus in soil polluted with heavy metal cadmium; according to the growth of the plants, they were watered irregularly and no special management was carried out. It should be noted that the soil polluted by heavy metal cadmium is generally a mining area or a chemical industry polluted area. Among them, the growth environment in the mining area is not good, which is not conducive to plant growth, but the grain amaranth has strong vitality and is easy to survive. set.

[0028] After the grain amaranthus bloomed, the flower buds were removed on a cloudy day. The Cd content in the flower buds was detected to be 0.08mg / Kg, which was lower than the Cd content standard (0.1mg / Kg) for poultry feed. The flower buds were made into feed and fed to poul...

Embodiment 2

[0031] The application of the grain amaranth of the present embodiment in repairing soil heavy metal cadmium pollution, the concrete way is:

[0032] On June 8, seedlings of the genus Amaranthus in the family Amaranthaceae were planted in soil polluted with heavy metal cadmium by using the method of planting seedlings under natural conditions. On July 13, ammonium nitrogen fertilizer was applied to the soil to add nitrification inhibitors. On October 11, apply a sulfur-rich acidic fertilizer to the soil.

[0033] After the grain amaranthus bloomed, the flower buds were removed on a sunny day, and the Cd content in the flower buds was detected to be 0.15 mg / Kg, which was higher than the Cd content standard (0.1 mg / Kg) for poultry feed, and the flower buds were dried and ashed.

[0034] Carry out cutting for the first time when the plant height of grain amaranth is 78cm, leave 20 centimeters of stubble, record the content of Cd in the grain amaranth of harvesting and be 154mg / K...

Embodiment 3

[0036] The application of the grain amaranth of the present embodiment in repairing soil heavy metal cadmium pollution, the concrete way is:

[0037] On July 18, seedlings of the genus Amaranthus in the family Amaranthaceae were planted in the soil polluted by heavy metal cadmium by using the method of planting seedlings under natural conditions. On August 20, nitrogen-containing compound fertilizers were added to the soil to add nitrification inhibitors.

[0038] After the grain amaranthus bloomed, the flower buds were removed on a cloudy day. The Cd content in the flower buds was detected to be 0.065 mg / Kg, which was lower than the Cd content standard (0.1 mg / Kg) for poultry feed. The flower buds were made into feed and fed to poultry.

[0039]Carry out cutting for the first time when grain amaranth plant height 75cm, leave 20 centimeters of stubble, record the content of Cd in the grain amaranth of harvesting and be 94mg / Kg, carry out second time mowing after one month, lea...

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Abstract

The invention discloses an application of prince's-feather in the remediation of heavy metal cadmium pollution in soil. The application specifically comprises the steps that seedlings of the prince's-feather are cultivated in the soil from May to September; after the prince's-feather blooms, buds are removed on cloudy or sunny days, and the Cd content of the removed buds is detected; and when theCd content of the removed buds is smaller than a preset value, the buds are made into feed. The method of the application has the advantages of being low in investment and cost, strong in operability,small in disturbance to the soil environment, permanent in treatment effect, large in application area and simple in post-treatment and not damaging site structures or leading to secondary pollution;and meanwhile, the individual biomass of the prince's-feather is large, so that the soil heavy metal remediation efficiency per unit area can be improved.

Description

technical field [0001] The invention relates to the field of treatment and repair of heavy metal polluted soil, in particular to the application of grain amaranth in repairing soil polluted by heavy metal cadmium. Background technique [0002] Industrial and agricultural production has caused a large amount of soil pollution, which not only degrades soil fertility, reduces crop yield and quality, but also deteriorates the environment and endangers human life and health through the food chain. The treatment of polluted soil has become a difficult point in environmental pollution control. [0003] Currently, there is a lack of cheap and effective purification technologies for polluted soil. Conventional physical or chemical methods such as vitrification, electrokinetics, heat treatment, and surfactants are not only expensive and complicated to operate, but also often lead to soil structure destruction, soil biological activity decline, and soil fertility degradation. Althoug...

Claims

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Application Information

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IPC IPC(8): B09C1/00
CPCB09C1/105B09C2101/00
Inventor 张卫刘加力赵轶王容杨美银
Owner 湖南省园林建设有限公司
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