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Solanum nigrum-based cadmium-arsenic composite contaminated soil plant optimization remediation method

A technology of compound pollution and restoration method, which is applied in the field of plant optimization restoration of cadmium and arsenic compound polluted soil based on Solanum nigrum, can solve the problems of long growth cycle and limited restoration efficiency of plants, and achieves the goal of promoting growth, reducing leaching toxicity, and improving stress resistance. Effects of Sexuality and Restorative Efficiency

Inactive Publication Date: 2020-08-14
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0003] However, a hyperaccumulative plant generally only has a good absorption effect on a specific heavy metal, and the plant growth cycle is long, the remediation efficiency is limited, and there is a problem of whether it can adapt to complex polluted soils, which limits the application of phytoremediation technology in the field of actual soil remediation. Applications

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  • Solanum nigrum-based cadmium-arsenic composite contaminated soil plant optimization remediation method
  • Solanum nigrum-based cadmium-arsenic composite contaminated soil plant optimization remediation method
  • Solanum nigrum-based cadmium-arsenic composite contaminated soil plant optimization remediation method

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Embodiment Construction

[0025] Such as figure 1 As shown, this example involves a phytooptimized repair method for cadmium-arsenic compound-contaminated soil based on Solanum nigrum, taking the cadmium-arsenic compound-contaminated soil in a farmland around a mine in Liuyang City, Hunan Province as an example, and the specific properties of the soil are shown in Table 1.

[0026] Table 1 Basic physical and chemical properties of the tested soil

[0027]

[0028] It can be seen from Table 1 that the farmland soil collected around a mining area in Liuyang City, Hunan Province is medium-intensity compound polluted soil with cadmium and arsenic, and the content of cadmium and arsenic exceeds the national standard, showing weak acidity.

[0029] This embodiment includes the following steps:

[0030] The first step, soil pretreatment: dig out the 0-30cm contaminated soil, remove large stones, branches and other debris, and break up large volume soil clumps to make the particle diameter less than 1cm; ...

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Abstract

The invention relates to a solanum nigrum-based cadmium-arsenic composite contaminated soil plant optimization remediation method, which comprises the following steps: pretreating soil to be remediated, carrying out incubation conditioning by using multiwalled carbon nanotubes, planting solanum nigrum seedlings, and completely harvesting solanum nigrum after solanum nigrum maturity, thereby implementing soil remediation. According to the invention, the special physicochemical properties of the multiwalled carbon nanotubes are utilized, the growth characteristics of the cadmium hyperaccumulation plant solanum nigrum are combined, the phytoremediation efficiency in the actual cadmium-arsenic contaminated soil can be improved, the growth and adaptability of solanum nigrum in the combined contaminated soil are remarkably promoted, the mobility and environmental risk of cadmium and arsenic in the soil can be reduced, operation is easy, materials are convenient to obtain, effect taking is quick, and the method has practical significance in comprehensively improving the actual application and promotion of the phytoremediation technology.

Description

technical field [0001] The invention relates to a technology in the field of environmental engineering, in particular to a method for phytooptimized restoration of cadmium-arsenic compound polluted soil based on black nightshade. Background technique [0002] Because phytoremediation of heavy metal pollution in soil can achieve the advantages of complete removal of pollutants, economical and environmental protection, and less environmental disturbance, it has become a hot spot in pollution remediation technology. The key to phytoremediation technology is to screen hyperaccumulator plants, and nightshade (Solanμm nigrμm L.) is a typical cadmium hyperaccumulator plant. Existing technologies for soil remediation based on Solanum nigrum mostly use abscisic acid solution, but there are certain environmental risks in the spraying of abscisic acid during the implementation of these technologies. [0003] However, a hyperaccumulative plant generally only has a good absorption effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
CPCB09C1/105
Inventor 周培陈寻峰王军才张丹支月娥初少华由义敏
Owner SHANGHAI JIAO TONG UNIV
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