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Method for promoting phytoremediation of heavy-metal-contaminated soil in mining area

A technology of polluted soil and phytoremediation, which is applied in the field of soil remediation to achieve the effect of reducing the content of heavy metals, reducing accumulation, and alleviating toxicity

Inactive Publication Date: 2019-09-20
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems of phytoremediation of heavy metal-contaminated soil in mining areas, a method for promoting phytoremediation of heavy metal-contaminated soil in mining areas was provided. By inoculating Funneliformis mosseae, the biomass of Populus yunnanensis was increased, and the resistance to heavy metals in Populus yunnanensis was improved. The restoration method of soil nutrient cycle and soil quality in polluted mining areas has the characteristics of low cost, good effect and no secondary pollution.

Method used

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  • Method for promoting phytoremediation of heavy-metal-contaminated soil in mining area
  • Method for promoting phytoremediation of heavy-metal-contaminated soil in mining area
  • Method for promoting phytoremediation of heavy-metal-contaminated soil in mining area

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Embodiment 1

[0029] Embodiment 1: a kind of method that promotes phytoremediation of mining area heavy metal polluted soil, concrete steps are as follows:

[0030] (1) Use sterilized horticultural vermiculite and farmland soil as the cultivation substrate for inoculant propagation: the volume ratio of horticultural vermiculite and farmland soil is 1:1, and the horticultural vermiculite and farmland soil are respectively passed through a 10-mesh sieve to remove large pieces of vermiculite and soil , mixed evenly, then placed in a high-pressure steam sterilizer, sterilized at a temperature of 121°C for 2 hours, repeated sterilization three times the next day, air-dried, and mixed to obtain a cultivation medium for the propagation of the inoculant;

[0031] Disinfect the surface of corn seeds and cultivate them until the corn germinates to obtain sterile corn seedlings: select Huidan No. 4 corn seeds with the same size, shape, and plumpness, disinfect the surface with alcohol for 10 minutes, a...

Embodiment 2

[0044] Embodiment 2: a kind of method that promotes phytoremediation of mining area heavy metal polluted soil, concrete steps are as follows:

[0045] (1) Use sterilized horticultural vermiculite and farmland soil as the cultivation substrate for inoculant propagation: the volume ratio of horticultural vermiculite and farmland soil is 1:1, and the horticultural vermiculite and farmland soil are respectively passed through a 10-mesh sieve to remove large pieces of vermiculite and soil , mixed evenly, then placed in a high-pressure steam sterilizer, sterilized at a temperature of 121°C for 2 hours, repeated sterilization three times the next day, air-dried, and mixed to obtain a cultivation medium for the propagation of the inoculant;

[0046] Disinfect the surface of corn seeds and cultivate them until the corn germinates to obtain sterile corn seedlings: select Huidan No. 4 corn seeds with the same size, shape, and plumpness, disinfect the surface with alcohol for 10 minutes, a...

Embodiment 3

[0064] Embodiment 3: a kind of method that promotes phytoremediation of mining area heavy metal polluted soil, concrete steps are as follows:

[0065] (1) Use sterilized horticultural vermiculite and farmland soil as the cultivation substrate for inoculant propagation: the volume ratio of horticultural vermiculite and farmland soil is 1.5:1, and the horticultural vermiculite and farmland soil are respectively passed through a 10-mesh sieve to remove large pieces of vermiculite and soil , mixed evenly, then placed in a high-pressure steam sterilizer, sterilized at a temperature of 121°C for 2 hours, repeated sterilization three times the next day, air-dried, and mixed to obtain a cultivation medium for the propagation of the inoculant;

[0066] Disinfect the surface of corn seeds and cultivate them until the corn germinates to obtain sterile corn seedlings: select Huidan No. 4 corn seeds with the same size, shape, and plumpness, disinfect the surface with alcohol for 10 minutes,...

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Abstract

The invention discloses a method for promoting phytoremediation of heavy-metal-contaminated soil in a mining area, and belongs to the technical field of soil remediation. The method includes preparing an inoculant soil layer from rhizosphere soil containing hyphae and spores of funneliformis mosseae; cultivating populus yunnanensis twigs into populus yunnanensis seedlings; taking the heavy-metal-contaminated soil in the sterile mining area as a populus yunnanensis culture medium, laying the inoculant soil layer on the upper side of the populus yunnanensis culture medium at the bottom of a culture container, putting the roots of the populus yunnanensis seedlings on the surface of the inoculant soil layer after disinfecting, laying the inoculant soil layer on the surfaces of the roots of the populus yunnanensis seedlings, and laying the populus yunnanensis culture medium from the surface of the inoculant soil layer to the top of the culture container; cultivating the populus yunnanensis seedlings in the culture container for more than 60 days to complete phytoremediation of the heavy-metal-contaminated soil in the mining area. The method has the advantages that the roots of the populus yunnanensis seedlings are inoculated with the funneliformis mosseae to complete planting, the biomass of populus yunnanensis is increased, the content of heavy metal in plants is reduced, the defending performance of the plants is enhanced, and the phytoremediation of the contaminated soil in the mining area is promoted.

Description

technical field [0001] The invention relates to a method for promoting phytoremediation of heavy metal polluted soil in mining areas, and belongs to the technical field of soil remediation. Background technique [0002] Heavy metal pollution in mining area soil is serious. The main heavy metal pollutants are cadmium (Cd) and lead (Pb). Tailings are seriously polluted by heavy metals, and the soil surface in mining areas is exposed in large areas. Mining activities and waste discharge damage and occupy a large amount of land resources. The discharge and accumulation of mine waste also bring environmental problems. [0003] As an emerging restoration technology, phytoremediation has irreplaceable advantages over traditional methods. However, the poor matrix conditions of mining abandoned land, lack of soil elements, poor nutrients, heavy metal pollution, and low activity of soil functional microorganisms have caused serious vegetation damage in mining areas, and plant growth ...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105
Inventor 刘弟李涛赵之伟
Owner YUNNAN UNIV
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