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Application of chlorophytum comosum in remediation of heavy metal contaminated soil and application method

A technology of polluted soil and application method, which is applied in the application field of Chlorophytum in remediating heavy metal-contaminated soil, can solve the problems of limited recovery effect, single heavy metal pollution recovery, etc., and achieve the effect of high economic value

Inactive Publication Date: 2012-07-04
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Most of the existing technologies are only for recovery of a certain heavy metal pollution, and the recovery effect is limited

Method used

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  • Application of chlorophytum comosum in remediation of heavy metal contaminated soil and application method
  • Application of chlorophytum comosum in remediation of heavy metal contaminated soil and application method
  • Application of chlorophytum comosum in remediation of heavy metal contaminated soil and application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: the method for repairing soil Zn pollution

[0022] Using the method of direct transplanting, the yellow-brown soil of the 0-40cm soil layer on the slope of the back mountain was taken for the test in Anhui Normal University. The physical and chemical characteristics of the tested soil are as follows: the pH value is 5.99±0.113, and the electrical conductivity is 105μs .cm -1 , the organic matter is 25.45g·kg -1 , the total nitrogen content is 1.57g·kg -1 , the total phosphorus content is 0.92g·kg -1 , the total potassium content is 8.04g·kg -1 . The background values ​​of soil heavy metals Cd, Zn, and Pb are respectively: the total Cd is 0.87±0.06mg·kg -1 , the total Zn is 146.37±2.33mg kg -1 , the total Pb is 25.50±2.09mg·kg -1 . After the soil is harvested, it is air-dried, passed through a 3mm sieve, and fully mixed for later use. A plastic flowerpot with a diameter of 12.5cm is used, and each pot is filled with 250g of soil. Heavy metal Zn a...

Embodiment 2

[0030] Embodiment 2: the method for repairing soil Pb pollution

[0031] Using the method of direct transplanting, the yellow-brown soil of the 0-40cm soil layer on the slope of the back mountain was taken for the test in Anhui Normal University. The physical and chemical characteristics of the tested soil are as follows: the pH value is 5.99±0.113, and the electrical conductivity is 105μs .cm -1 , the organic matter is 25.45g·kg -1 , the total nitrogen content is 1.57g·kg -1 , the total phosphorus content is 0.92g·kg -1 , the total potassium content is 8.04g·kg -1 . The background values ​​of soil heavy metals Cd, Zn, and Pb are respectively: the total Cd is 0.87±0.06mg·kg -1 , the total Zn is 146.37±2.33mg kg -1 , the total Pb is 25.50±2.09mg·kg -1 . After the soil is harvested, it is air-dried, passed through a 3mm sieve, and fully mixed for later use. A plastic flowerpot with a diameter of 12.5cm is used, and each pot is filled with 250g of soil. Heavy gold Pb an...

Embodiment 3

[0039] Embodiment 3: the method for repairing soil Cd pollution

[0040] Using the method of direct transplanting, the yellow-brown soil of the 0-40cm soil layer on the slope of the back mountain was taken for the test in Anhui Normal University. The physical and chemical characteristics of the tested soil are as follows: the pH value is 5.99±0.113, and the electrical conductivity is 105μs cm -1 , the organic matter is 25.45g·kg -1 , the total nitrogen content is 1.57g·kg -1 , the total phosphorus content is 0.92g·kg -1 , the total potassium content is 8.04g·kg -1 . The background values ​​of soil heavy metals Cd, Zn, and Pb are respectively: the total Cd is 0.87±0.06mg·kg -1 , the total Zn is 146.37±2.33mg kg -1 , the total Pb is 25.50±2.09mg·kg -1 . After the soil is harvested, it is air-dried, passed through a 3mm sieve, and fully mixed for later use. A plastic flowerpot with a diameter of 12.5cm is used, and each pot is filled with 250g of soil. Heavy gold Cd in ...

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Abstract

The invention discloses application of chlorophytum comosum in remediation of heavy metal contaminated soil and an application method. The application method is that chlorophytum comosum is planted on the heavy metal (Cd, Pb and Zn) contaminated soil, heavy metals in the contaminated soil are absorbed by a root system of the chlorophytum comosum and are transferred to above-ground organs like stems and leaves, after growing for 90 days, the plant is wholly moved away from the contaminated soil, so that the purpose of removing the heavy metals in the soil can be achieved. Compared with the prior art, the chlorophytum comosum can remedy a plurality of kinds of heavy metals at the same time; higher economic value is achieved besides remediation; in addition, secondary pollution is not brought about.

Description

technical field [0001] The invention belongs to the application and method of plants in repairing heavy metal polluted soil, in particular the application and method of Chlorophytum in repairing heavy metal polluted soil. 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 heavy metal-contaminated soil caused by industrial pollution of irrigated farmland. [0003] In recent years, heavy metal pollution has become the top priority of environmental problems. Heavy metal (such as Cd, Cu, Pb, Zn, etc.) pollution is concealed, long-term, and irreversible. The pollutants have poor mobility in the medium, long residence time, cannot be degraded ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 王友保代杰黄永杰陶洁敏
Owner ANHUI NORMAL UNIV
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