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Remediation method for heavy-metal-contaminated soil

A technology for pollution remediation and heavy metals, applied in the restoration of contaminated soil, etc., can solve the problems of poor remediation effect and high cost, and achieve the effects of large-scale treatment, rapid growth, and maintenance of soil biological activity and soil physical properties

Inactive Publication Date: 2017-09-15
LIAONING PROVINCIAL ENVIRONMENTAL PROTECTION SCI INST
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] The embodiment of the present invention provides a soil heavy metal pollution repair method, which is used to make up for the problems of huge cost and poor repair effect in the repair of heavy metal contaminated soil by existing physical and chemical methods

Method used

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  • Remediation method for heavy-metal-contaminated soil

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Effect test

Embodiment 1

[0106] Changes in growth morphology and biomass of ragweed when remediating soil polluted by heavy metals lead and cadmium

[0107] Heavy metals Pb and Cd are non-essential elements for plant growth. Accumulated to a certain extent in plants, it will affect the normal growth and development of plants, resulting in a decrease in biomass and even death. After heavy metal treatment, the most obvious phenotypes of plants are the symptoms of leaf toxicity and the growth inhibition of plant leaves and roots, and the degree of damage is related to the concentration of heavy metal treatment. Studies have shown that low concentrations of Pb and Cd can promote the growth and development of certain plants, which may lead to an increase in biomass or changes in physiological morphology, while exceeding a certain concentration will inhibit plant growth. In this study, five single concentrations and two compound concentrations were set for Pb(II) and Cd(II). According to the characteristic...

Embodiment 2

[0109] Changes in migration and accumulation characteristics of ragweed in plants when remediating soil polluted by heavy metals lead and cadmium

[0110] The heavy metal content in plants is a key indicator to measure plant tolerance and resistance. The accumulation characteristics of heavy metals in plants are related to the absorption and tolerance of heavy metals, the distribution of aboveground and underground parts, and the existing material combination forms. Generally speaking, heavy metals in ordinary plants mainly accumulate in the underground roots, and the contents in the aboveground parts are relatively small, such as Pb, Hg, etc.; , nucleic acid substances, etc. are combined into stable macromolecules or insoluble organic molecules and then deposited, which reduces the impact of heavy metal stress on plants to a certain extent and improves the tolerance of plants to heavy metals. However, the accumulation of a certain heavy metal in some special plants is simila...

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Abstract

The invention discloses a remediation method for heavy-metal-contaminated soil and relates to the field of ecological environment remediation. The method comprises the steps that ragweed is planted on the heavy-metal-contaminated barren land; and the ragweed is reaped, transferred, incinerated and subjected to heavy metal extraction sequentially in the period before the start of the flowering period of the ragweed. According to the remediation method, the heavy-metal-contaminated soil is remedied through the ragweed, the ragweed grows fast in the growing period and branching period, and the ragweed has the high absorption function and enrichment function on the heavy metal pollution in the soil; and the ragweed has the beneficial effects of being high in growth speed, large in biomass, high in adaptability, low in cost, wide in distribution and the like, a lot of lead, cadmium and the like in the soil, especially in the overground part, can be transferred into the plants, the ragweed is reaped and transferred manually before the flowering period and is incinerated, then heavy metals are extracted, and therefore the soil pollution such as lead and cadmium is remedied, and the higher economic value and economical environment value are provided for the effective utilization of heavy metal soil remediation by the plants and invasive alien species.

Description

technical field [0001] The invention relates to the field of ecological environment restoration, in particular to a method for restoration of soil heavy metal pollution. Background technique [0002] Soil is an important part of the human ecological environment, and it is also the basis for the survival of human society. With the rapid development of industry, agriculture, and science and technology in today's society, it has greatly promoted the rapid progress of human life and economy. However, the contradiction between economic benefits and environmental protection prevailing in industrial development, metal rolling, sewage discharge, sewage irrigation , mining and smelting, atmospheric subsidence, solid waste accumulation, large-scale application of pesticides and fertilizers, etc., have caused the pollution of the soil system to become increasingly serious. There are many types of soil pollution in my country, which can be roughly divided into several types: heavy meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
CPCB09C1/105
Inventor 王欣若吕久俊王延松
Owner LIAONING PROVINCIAL ENVIRONMENTAL PROTECTION SCI INST
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