Method for activating and repairing cadmium-contaminated soil by using sedum plumbizincicola

A technology of cadmium-contaminated soil and sedum with ore, which is applied in the field of heavy metal-contaminated soil, can solve the problems of slow effect, achieve the effect of reducing content, no secondary pollution, high treatment and repair efficiency

Inactive Publication Date: 2020-03-27
湖南超富集生态科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for activating and repairing cadmium-contaminated soil by using Sedum sedum with ore, so as to solve the problem of slow effect of the existing methods for repairing cadmium-contaminated soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The embodiment of the present application provides a method for activating and repairing cadmium-contaminated soil by using Sedum sedum with ore, the method comprising:

[0034] S101: Apply the chemical barrier agent evenly on the surface of the cadmium-contaminated soil. Wherein, the components in the chemical barrier include 50 parts by weight of chemical barrier material, 45 parts of chemical passivation material, 20 parts of chemical strengthening material and 20 parts of plant growth regulating material. The chemical barrier materials are calcium oxide, calcium hydroxide and dolomite powder. The chemical passivation materials are polyhydroxy ferric phosphate, polyhydroxy phosphate ferric chloride and polymerized iron chitin. The chemical strengthening materials are biological humic acid, oxalic acid, citric acid and sepiolite. Plant growth regulating materials are calcium magnesium phosphorus powder, calcium cyanamide, animal bone meal and straw organic fertilize...

Embodiment 2

[0039] The embodiment of the present application provides a method for activating and repairing cadmium-contaminated soil by using Sedum sedum with ore, the method comprising:

[0040] S201: Apply the chemical barrier agent evenly on the surface of the cadmium-contaminated soil. Wherein, the components in the chemical barrier include 30 parts by weight of chemical barrier material, 40 parts of chemical passivation material, 5 parts of chemical strengthening material and 5 parts of plant growth regulating material. The chemical barrier materials are calcium hydroxide and dolomite powder. The chemical passivation materials are polyhydroxy ferric phosphate and polyhydroxy phosphoferric chloride. The chemical strengthening materials are oxalic acid and citric acid. The plant growth regulating materials are calcium cyanamide and animal bone meal.

[0041] S202: Mix the chemical barrier agent and the cadmium-contaminated soil evenly by means of rotary tillage.

[0042] S203: Aft...

Embodiment 3

[0045] The embodiment of the present application provides a method for activating and repairing cadmium-contaminated soil by using Sedum sedum with ore, the method comprising:

[0046] S301: Apply the chemical barrier agent evenly on the surface of the cadmium-contaminated soil. Wherein, the components in the chemical barrier include 35 parts by weight of chemical barrier material, 30 parts of chemical passivation material, 15 parts of chemical strengthening material and 15 parts of plant growth regulating material. The chemical barrier material is calcium oxide. The chemical passivation material is polyhydroxy iron phosphate. The chemical strengthening material is biological humic acid. The plant growth regulating material is calcium magnesium phosphorus powder.

[0047] S302: Mix the chemical barrier agent and the cadmium-contaminated soil evenly by means of rotary tillage.

[0048] S303: After watering and fertilizing, the cultivated sedum with ore is planted in the uni...

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PUM

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Abstract

The invention provides a method for activating and repairing cadmium-contaminated soil by using sedum plumbizincicola. The method comprises the following steps: uniformly spraying a chemical blockingagent on the surface of the cadmium-contaminated soil; uniformly mixing the chemical blocking agent and the cadmium-contaminated soil; planting the cultivated sedum plumbizincicola into the cadmium-contaminated soil after water and fertilizer are thoroughly watered; and collecting the mature sedum plumbizincicola and incinerating the sedum plumbizincicola at high temperature to obtain cadmium metal-containing fly ash and bottom slag. The chemical blocking agent and the cadmium ions in soil are subjected to oxidation, adsorption, polymerization and other chemical reactions, the cadmium ions inthe soil are preliminarily separated and precipitated and then the content of the cadmium ions in the soil is preliminarily reduced. Meanwhile, the sedum plumbizincicola gather cadmium ions in the cadmium-contaminated soil by means of activated extraction, adsorption and transfer so that the treatment and the remediation of the cadmium-contaminated soil are quickly realized by means of the two modes. The method provided can significantly reduce the content of exchange states such as composite heavy metals in soil and has high treatment and remediation efficiency and is ecological and environment-friendly without secondary pollution.

Description

technical field [0001] The invention relates to the technical field of heavy metal-contaminated soil, in particular to a method for activating and repairing cadmium-contaminated soil by using sedum with ore. Background technique [0002] Soil heavy metal pollution refers to soil pollution caused by heavy metals or their compounds entering the soil through various channels. In soil polluted by heavy metals, heavy metals are easy to accumulate with organisms, and even some heavy metal elements can be converted into more toxic methyl compounds in the soil, and accumulate in the human body at harmful concentrations through the food chain, endangering human health. [0003] At present, soil heavy metal pollution mainly includes mercury, cadmium, lead, copper, arsenic, zinc and other heavy metals. Among them, cadmium is widely used in electroplating industry, chemical industry, electronics industry, nuclear industry and other fields, and with the development of electroplating ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B09C1/10
CPCB09C1/08B09C1/105
Inventor 覃琦贺爱国陈锦
Owner 湖南超富集生态科技有限公司
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