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Method for repairing heavy metal polluted soil by using mirabilis jalapa flower plants

A technology of polluted soil and phytoremediation, which is applied in the field of repairing heavy metal-contaminated soil with Mirabilis flower plants, which can solve the problems of large engineering volume, soil structure damage, and high cost, and achieve the effect of alleviating heavy metal pollution

Inactive Publication Date: 2018-09-28
益阳创惠技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a method for repairing heavy metal-contaminated soil by using mirabilis flowers and plants. Aiming at the shortcomings of existing heavy metal-cadmium compound-contaminated soil technology methods, such as large amount of engineering, high cost, and easy to cause soil structure damage, a method is provided. The method of remediating acid and heavy metal cadmium complex polluted soil by using imperial bamboo grass

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Mirabilis jasmine and imperial bamboo grass were tested in heavy metal cadmium compound polluted soil with an average heavy metal cadmium content of 0.72mg / kg. Beginning in November 2015, slow-release fertilizers were applied to the soil, so that the slow-release fertilizers and then the base manure were fully mixed with the soil, wherein the slow-release fertilizers mainly included 30% polyhydroxyalkanoate, 30% diatomaceous earth and 30% polyhydroxyalkanoate by weight. % humic acid, also includes 30% chemical fertilizer raw materials and 30% other components, the other components are starch, talcum powder, calcium carbonate, lime, gypsum mixture, base fertilizer is biogas residue, pig manure, sheep manure, Cow dung; then raised a low ridge, plowed and planted mirabilis and imperial bamboo grass, and the mirabilis and imperial bamboo grass were arranged at intervals of one row of mirabilis and one row of imperial bamboo grass, and the planting density specification was 8...

Embodiment 2

[0031] Mirabilis jasmine and imperial bamboo grass were tested in heavy metal cadmium compound polluted soil with an average heavy metal cadmium content of 0.68mg / kg. Beginning in November 2015, slow-release fertilizers and base fertilizers were applied to the soil to fully mix the slow-release fertilizers and base fertilizers with the soil, wherein the slow-release fertilizers mainly included 40% polyhydroxyalkanoate and 40% diatomaceous earth by weight and 40% humic acid, including 40% fertilizer raw materials and 40% other components, the other components are starch, talcum powder, lime, gypsum, kaolin, brucite, wood powder, straw, bentonite, various The mixture, the base fertilizer is biogas residue, pig manure, sheep manure, and cow dung; then a low ridge is raised, plowed to plant mirabilis and emperor bamboo grass, and every two rows of mirabilis and one row of emperor bamboo grass are planted at intervals, and the planting density specification is 75cm×50cm. The plant...

Embodiment 3

[0034] Mirabilis jasmine and imperial bamboo grass were tested in heavy metal cadmium compound polluted soil with an average heavy metal cadmium content of 0.68mg / kg. Beginning in November 2015, slow-release fertilizers are applied to the soil, so that the slow-release fertilizers and then the base manure are fully mixed with the soil, wherein the slow-release fertilizers mainly include 60% polyhydroxyalkanoate, 50% diatomaceous earth and 50% polyhydroxyalkanoate by weight. % humic acid, also includes 50% fertilizer raw materials and 50% other components, the other components are starch, talcum powder, lime, gypsum, kaolin, straw, bentonite, various mixtures, the base fertilizer is biogas residue, pig manure , sheep dung, cow dung; then raised a low ridge, plowed and planted mirabilis and imperial bamboo grass, planted mirabilis around the roots of mirabilis, and planted around mirabilis, and the planting density specification was 75cm×50cm. The planting work was completed on ...

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Abstract

The invention is suitable for ecological repair technologies of polluted environments, in particualr, relates to a method for repairing heavy metal polluted soil by using mirabilis jalapa flower plants. The method comprises the following steps: a controlled release fertilizer is applied into soil, and a base fertilizer of the controlled release fertilizer is fully mixed with the soil; mirabilis jalapa and pennisetum hydridum are planted according to the heavy metal pollution types in the soil, and are arranged according to preset rules; a reinforcing agent is added in chromium polluted soil; and the mirabilis jalapa and the pennisetum hydridum are harvested after a period of time for centralized recovery treatment. The mirabilis jalapa and the pennisetum hydridum are planted in an united manner, and are both hyperaccumulators; and the absorption capacity of the mirabilis jalapa and the pennisetum hydridum on heavy metal is used for relieving the heavy metal pollution problem of the soil.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration of polluted environment, and in particular relates to a method for repairing heavy metal-contaminated soil by using mirabilis flower plants. Background technique [0002] Farmland soil pollution has become one of the important factors restricting the sustainable development of agriculture and food safety. In 2001, the Huanjiang Maonan Autonomous County of Guangxi Autonomous Region suffered a once-in-a-century flood disaster, which caused the solid waste of the beneficiation plants in the Beishan, Yamai, and Duchuan areas to flow into the Dahuan River with the flood, and about 80,000 to 10,000 cubic meters of tailings and sulfur The iron powder was washed into the river, causing serious pollution to the farmland soil along the river in Luoyang, Da'an and Si'en townships. Substances such as lead-zinc ore tailings and sulfur iron powder enter the soil of the project area to cause stro...

Claims

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Application Information

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IPC IPC(8): B09C1/00
CPCB09C1/105B09C2101/00
Inventor 廖成勇
Owner 益阳创惠技术服务有限公司
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