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Method for restoring cadmium/lead single or combined polluted soil by using hyperaccumulating flower emilia sonchifolia

A complex pollution and super-accumulation technology, applied in the field of flower and phytoremediation, to achieve the effect of good tolerance, beautifying the local environment and strong adaptability

Inactive Publication Date: 2014-01-01
NANKAI UNIV
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to explore cheap and green methods to control and restore heavy metal-contaminated soil, especially to solve the problem that most of the existing super-accumulating plants can only exert their super-accumulating effect and repairing effect on a single heavy metal, and provide a method for using A method for remediating cadmium (Cd), lead (Pb) single or compound polluted soil by hyperaccumulating flower plant Yidianhong

Method used

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  • Method for restoring cadmium/lead single or combined polluted soil by using hyperaccumulating flower emilia sonchifolia
  • Method for restoring cadmium/lead single or combined polluted soil by using hyperaccumulating flower emilia sonchifolia
  • Method for restoring cadmium/lead single or combined polluted soil by using hyperaccumulating flower emilia sonchifolia

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Embodiment Construction

[0015] Embodiment 1, a little red repair Cd, Pb single or compound polluted soil example:

[0016] The soil for testing was collected from the southeastern suburb of Tianjin, and its soil type was fluvo-aquic soil. After analysis and determination, the soil pH is 7.8, slightly alkaline; soil mechanical composition: sand (particle size 2.0-0.02mm) accounts for 32%, silt (0.02-0.002mm) accounts for 44%, clay (below 0.002mm) ) accounted for 24%, showing that the soil texture is clay loam; the contents of Cd and Pb in the soil were 0.21 mg / kg and 10.3 mg / kg, respectively. It can be seen from the existing literature that the background values ​​of Cd and Pb in soil in my country range from 0.017-0.33 and 10.0-56.1 mg / kg, respectively. It can be seen that the tested soil basically belongs to the category of clean soil.

[0017] In this study, the pollution exposure concentration of soil Cd was set at 0.6 mg / kg (T 1 , equivalent to the secondary quality standard value of soil un...

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Abstract

The invention relates to a method for restoring cadmium / lead single or combined polluted soil by using hyperaccumulating flower emilia sonchifolia, which comprises the following steps: sowing or planting an emilia sonchifolia seed or seedling in cadmium / lead single or combined polluted soil, periodically watering to keep the soil moist until the emilia sonchifolia blooms or is full ripe, removing the whole plant or the above-ground part from the polluted site, and treating properly; and repeating the operation until the Cd and Pb contents in the soil are reduced to environmental safety standard. The emilia sonchifolia has the advantages of high adaptability and wide distribution range, and is also defined as both a Cd hyperaccumulating plant and a Pb hyperaccumulating plant, i.e. the emilia sonchifolia simultaneously satisfies the judgment for critical content characteristics, pollutant transfer characteristics, tolerance characteristics and enrichment coefficient characteristics of Cd / Pb hyperaccumulating plants. The method has important practical meanings for restoring Cd / Pb single or combined polluted soil, and especially has the effect of beautifying the environment on the premise of restoring the heavy metal polluted soil when being used as a green in-situ restoration technique.

Description

technical field [0001] The present invention relates to the restoration technology of flowers and plants in heavy metal single or compound polluted soil, specifically a flower plant using heavy metal superaccumulation for the first time. Emilia sonchifolia L.) Method for repairing Cd, Pb single or compound polluted soil. Background technique [0002] With the rapid development of industrial and agricultural production, the problem of heavy metal pollution in soil has become increasingly prominent. Data show that most urban soils and agricultural soils in the suburbs of my country are polluted by heavy metals such as cadmium (Cd) and lead (Pb) to varying degrees [Document 1: Zhou Qixing. Composite Pollution Ecology. Beijing: China Environmental Science Press, 1995 ; Literature 2: Sun Tieheng et al. Pollution Ecology. Beijing: Science Press, 2001]. Relevant reports also pointed out that the pollution area of ​​Cd, Pb and other heavy metals in a hilly area of ​​Jiangsu Provin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
CPCB09C1/105
Inventor 周睿人刘维涛周启星
Owner NANKAI UNIV
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