Method for repairing and treating soil with heavy metal pollution using daisy

A technology for contaminated soil and cadmium-contaminated soil, applied in the field of remediation and treatment of heavy metal-contaminated soil by using daisies, can solve the problems of affecting application, incomplete breeding potential research, poor regional adaptability, etc., to beautify the environment, improve soil degradation and productivity decline, The effect of small amount of work

Inactive Publication Date: 2009-06-24
SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

However, there are still relatively few cadmium-accumulating/hyperaccumulating plants that have been discovered, and even fewer have my country's independent intellectual property rights; most of the cadmium-enriching/hyperaccumulating plants that have been screened are wild species, with poor regional adap

Method used

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  • Method for repairing and treating soil with heavy metal pollution using daisy
  • Method for repairing and treating soil with heavy metal pollution using daisy
  • Method for repairing and treating soil with heavy metal pollution using daisy

Examples

Experimental program
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Effect test

Embodiment 1

[0020] This experiment was carried out in 2006. 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. The potting test soil was collected from the top soil (0-20cm) in the non-polluted area of ​​the station. The soil type is meadow brown soil. Its basic physical and chemical properties are: pH value 6.60, organic matter content 1.55%, total Cd content 0.22mg / kg, total As Content 10.40mg / kg.

[0021] Three treatments were set up in the experiment, namely: CK (control, no heavy metal added), Cd 10 mg / kg, Cd 10 mg / kg+As 100 mg / kg, and each treatment was repeated 3 times. The Cd added in the experiment was analytically pure CdCl 2 2.5H 2 O, As is analytically pure Na 2 HASO 4 ·7H 2 O. After air-drying the test soil and passing through a 4mm sieve, mix cadmium and arse...

Embodiment 2

[0028] This experiment was carried out in 2007. The experimental site is in the net room of the 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, which is an uncontaminated area for heavy metals. The potting test soil was collected from the surface soil (0-20 cm) in the pollution-free zone of the Shenyang Ecological Station of the Chinese Academy of Sciences, and its basic physical and chemical properties were the same as in Example 1.

[0029] There are 8 treatments in this experiment, and the Cd concentrations (mg / kg) added are: 0 (control, not added), 12, 24, 36, 48, 72, 96 and 150, and each treatment is repeated 3 times . The Cd added in the experiment was analytically pure CdCl 2 2.5H 2 O. After air-drying the test soil and passing through a 4mm sieve, mix it with cadmium in solid form, mix well and put it into a plastic basin ( =20cm, H=15cm), each ...

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Abstract

The invention relates to phytoremediation technology for treating polluted environment, in particular to a method for reparing cadmium-polluted earth by using a cadmium-enriched flower, namely Bellis perennis. The method utilizes root systems of the cadmium-enriched plant Bellis perennis to absorb cadmium enriched in the polluted earth in large amount, transfers the cadmium upward to the overground part, integrally removes the plant and properly treats the plant when the plant grows to the blossom time, thereby the plant absorbs and removes a large amount of the cadmium from the earth; and by repeatedly planting the plant and repeating the process, excessive cadmium in the 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, beautifying the environment beautification while treating the polluted earth, and the like.

Description

technical field [0001] The invention relates to the phytoremediation technology of polluted environment, in particular to a method for remediating heavy metal polluted soil by using daisies. Background technique [0002] Due to the arbitrary discharge of industrial "three wastes" and unreasonable agricultural production activities, heavy metal pollution in my country's soil environment has become increasingly serious. According to statistics, the area of ​​cultivated land polluted by heavy metals such as cadmium, arsenic, and lead in my country is nearly 20 million ha, accounting for about 1 / 5 of the total cultivated land area; my country's annual reduction of grain production due to heavy metal pollution exceeds 10 million tons. It is also up to 12 million tons per year, resulting in a total economic loss of at least 20 billion yuan. 11:143-151.]. According to reports, the Dayu Mining Area in Jiangxi, the Zhangshi Irrigation Area in Shenyang City, and the Shachuan Irrigatio...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10A01G1/00
Inventor 王林周启星任丽萍孙约兵
Owner SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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