Method for repairing and treating soil with cadmium pollution using flowering plant Indian marigold

A technology for cadmium-contaminated soil and polluted soil, which is applied in the field of remediation and treatment of cadmium-contaminated soil by using the flower plant Malachite, can solve the problems of incomplete research on breeding potential, small aboveground biomass, poor regional adaptability, etc., so as to improve soil degradation and Reduced productivity, rapid growth, and small engineering effort

Inactive Publication Date: 2009-06-24
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, among the 400-500 hyperaccumulator plants that have been discovered so far, there are very few species of cadmium hyperaccumulator plants, and even fewer cadmium hyperaccumulator plants with independent intellectual property rights in my country; Most of the enriched plants are wild species with poor regional adaptability, slow growth and small aboveground biomass. In addition, the research on agronomic traits, pest control, breeding potential and physiology is incomplete, which seriously affects their application in actual restoration [Literature 6: Ute K. Phytomediation: novel approaches to cleaning up polluted soils. Current Opinion in Biotechnology, 2005, 16: 133-141.]

Method used

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  • Method for repairing and treating soil with cadmium pollution using flowering plant Indian marigold
  • Method for repairing and treating soil with cadmium pollution using flowering plant Indian marigold
  • Method for repairing and treating soil with cadmium pollution using flowering plant Indian marigold

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Example 1: Confirmation and simulation application of potted gradient cadmium hyperaccumulation plants

[0017] The potting experiment site is in the net room of Shenyang Institute of Applied Ecology, Chinese Academy of Sciences. The site is in the center of Shenyang. There are no pollution sources around the experimental site, and it is an area that is not polluted by heavy metals. The potting test soil was collected from the surface soil (0-20cm) in the pollution-free area of ​​the Shenyang Ecological Station of the Chinese Academy of Sciences, and the soil type was meadow brown soil.

[0018] There were 8 treatments in this experiment, and each treatment was repeated 3 times. The Cd concentrations (mg / kg) added were: 0 (control, not added), 12, 24, 36, 48, 72, 96 and 150 . The Cd added in the experiment was analytically pure CdCl 2 2.5H 2 O, and apply a certain concentration of nitrogen, phosphorus, and potassium fertilizers as base fertilizer: 0.15g / kg N(CO(NH 2...

Embodiment 2

[0026] Example 2: Confirmation of field plots and remediation of cadmium-contaminated soil

[0027] The experimental site is located in the Shenyang Ecological Station of the Chinese Academy of Sciences, which is located in the center of the Lower Liaohe Plain, about 35km away from Shenyang City, and belongs to the warm temperate semi-humid continental climate. There are 3 plots in the experiment, the cadmium treatment concentrations (mg / kg) are: 0, 10, 50 respectively, and the cadmium in each plot has been added for more than one year; the area of ​​the experimental plot is 2m 2 (L=2m, W=1m), the basic physical and chemical properties of the soil are the same as the potting soil. Select 5-8cm of seedling height, contain 4 true leaves, and grow uniformly Malachite flower seedlings and move them into the plots, plant 8 rows in each plot, 8 trees in each row, 64 trees in total. Adopt the open-air cultivation mode, according to the situation of abundance and deficiency of soil m...

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Abstract

The invention relates to phytoremediation technology for treating polluted environment, in particular to a method for repairing and treating the earth polluted by cadmium by using a flower plant, namely maidenhair. The method utilizes root systems of the cadmium ultra-enriched flower maidenhair to absorb the enriched cadmium in the polluted earth in large amount, transfers the cadmium upward to the overground part; when plants grow to the height of between 30 and 40 centimeters or the blossom time, the plants are integrally removed and sold as commercial ornamental flowers or properly treated so as to absorb and remove a large amount of the cadmium from the earth; and by repeatedly planting the flower plant and repeating the process, excessive cadmium in the polluted earth can be continuously extracted until the content of the cadmium achieves the environment safety standards. The method has the advantages of small engineering quantity, no destruction to physicochemical property of the earth, no secondary pollution, beatifying environment while treating the polluted earth, and the like.

Description

technical field [0001] The invention relates to a phytoremediation technology for polluted environment, in particular to a method for remediating and treating cadmium-contaminated soil by using the flower plant Malacockia. Background technique [0002] With the discovery of bone pain disease in Japan, the pollution of soil cadmium and other heavy metals has attracted the attention of various countries in the late 1960s. In my country, with the revelation of cadmium pollution in Zhangshi sewage irrigation area, soil cadmium pollution has gradually been brought up on the agenda. However, in recent years, with the rapid development of industrial and agricultural production in our country, cadmium pollution in the soil environment of our country has become an increasingly serious environmental problem. More and more production and living activities, such as large-scale mining and smelting of cadmium-containing minerals, industrial use of cadmium-containing raw materials, agricu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/10A01G1/00
Inventor 周启星王林任丽萍孙约兵
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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