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Method for repairing cadmium pollution soil using with asteraeae plant

A technology of cadmium-contaminated soil and Compositae plants, which is applied in the field of repairing cadmium-contaminated soil with Compositae plants, so as to achieve the effect of not destroying soil physical and chemical properties, reducing soil wind erosion, and not causing secondary pollution

Inactive Publication Date: 2008-03-26
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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Problems solved by technology

Because when the concentration of heavy metals in the soil is high enough to exceed the critical content standard that hyperaccumulator plants should reach, or even several times higher, the accumulation of heavy metals in plants has the characteristics of increasing with the concentration of heavy metals in the soil [Document 9: Guo Shuiliang, Huang Chaobiao, Bian Yuan, Lin Guoping. 2002. Absorption and enrichment of heavy metal elements in soil by weeds in the suburbs of Jinhua (I)-Analysis of the content of 6 heavy metal elements in weeds and soil. Journal of Shanghai Jiao Tong University (Agricultural Science Edition), 20 (1): 22-29], although the accumulation of heavy metals in plants has reached the recognized critical content standard, when the heavy metal concentration in the soil is slightly lower than the content standard that hyperaccumulator plants should reach, The accumulation of heavy metals in plants may be difficult to reach the critical content standard of hyperaccumulator plants and show the same characteristics as ordinary plants. Ordinary plants may also grow normally in the presence of high concentrations of heavy metals, so the surface characteristics of greater tolerance displayed by those plants may also be an artifact

Method used

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  • Method for repairing cadmium pollution soil using with asteraeae plant

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Embodiment 1

[0015] In view of the lack of research on enrichment / accumulation plants of Cd single pollution and Cd-Pb-Cu-Zn compound pollution in phytoremediation, the field pot simulation test method was used to test the heavy metal tolerance of 65 field weed plants from 22 families in Shenyang, Northeast China. and preliminary systematic research on accumulative capacity.

[0016] The test site is located in the Shenyang Ecological Experiment Station of the Chinese Academy of Sciences. The geographical location is 123°41' east longitude, 41°31' north latitude, and an altitude of about 50m. There is no pollution source around the test station, which is an uncontaminated area of ​​heavy metals. The station is located in the center of the southern part of the Songliao Plain, about 35km away from the urban area of ​​Shenyang. Volume 520~544KJ / cm 2 , the frost-free period is 127-164 days, and the annual precipitation is 650-700mm. The pot test was collected from the topsoil (0-20cm) of the s...

Embodiment 2

[0029] The test site is located in the Shenyang Ecological Experiment Station of the Chinese Academy of Sciences. The geographical location is 123°41' east longitude, 41°31' north latitude, and an altitude of about 50m. There is no pollution source around the test station, which is an uncontaminated area of ​​heavy metals. The station is located in the center of the southern part of the Songliao Plain, about 35km away from the urban area of ​​Shenyang. Volume 520~544KJ / cm 2 , the frost-free period is 127-164 days, and the annual precipitation is 650-700mm. The pot test was collected from the topsoil (0-20cm) of the station, and the soil type was meadow brown soil.

[0030] A total of 6 treatments were set up in the test, which were control CK, no Cd and 5 different Cd dosing concentration experiments, Cd dosing concentration: 10mg / kg (R1), 25mg / kg (R2), 50mg / kg (R3), 100mg / kg (R4), 200mg / kg (R5), the form of heavy metal added is CdCl 2 2.5H 2 O is an analytically pure reag...

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Abstract

The present invention relates to a method for repairing soil contaminated by cadmium. It is characterized by that said invention utilizes plantation of bidens tripartite in the soil contaminated by cadmium so as to attain the goal of repairing said soil. Said invention also provides the plantation method of bidens tripartite and its field management method.

Description

technical field [0001] The invention relates to a phytoremediation technology for polluted environment, in particular to a method for remediating cadmium-contaminated soil by using Compositae plants. Background technique [0002] There are usually two ways for heavy metals to pollute soil: one is the environmental pollution caused by metal mining activities. Serious soil; heavy metal polluted soil caused by leaching and other reasons during the mining waste rock stacking process; soil pollution caused by mine wastewater containing high concentrations of heavy metals, etc. The second is the heavy metal-contaminated soil caused by industrial sewage irrigating farmland. The representative one is the earliest, large-scale and seriously polluted soil in Shenyang Zhangshi Irrigation District. The main heavy metal pollutant is Cd [Document 1: Wu Yan Yu, Chen Tao, Zhang Xuexun. 1986. Research on the Pollution Ecology of Cadmium in Zhangshi Irrigation District, Shenyang. See: Gao Zh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/10
Inventor 魏树和周启星
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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