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Ecological remediation method for heavy metal contaminated soil

A contaminated soil and ecological restoration technology, applied in the field of soil restoration, can solve the problems of chemical leaching residues and secondary pollution, the inability to completely eradicate the risk of heavy metal hazards, and the low efficiency of single phytoremediation, so as to improve the habitat conditions of earthworms, suitable for The effect of large-scale promotion and application and promotion of migration and transformation

Active Publication Date: 2017-03-08
东莞市碧江源环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a method for ecological restoration of heavy metal-contaminated soil in view of the deficiencies of the prior art. This method has the characteristics of low restoration cost, simple operation and management, short restoration period, and no secondary pollution, thereby solving the problem of single Low efficiency of phytoremediation and long repair period; secondary pollution caused by chemical leaching residues and emissions; and the problem that heavy metals cannot be completely eradicated by adsorption or immobilization methods and there are still risks of harm

Method used

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  • Ecological remediation method for heavy metal contaminated soil

Examples

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Effect test

Embodiment 1

[0026] Example 1 Soil remediation of one round of dry farming and one round of wet farming

[0027] like figure 1 As shown, dry farming phytoremediation was started, and after heavy metal-contaminated soil was repaired, terrestrial hyperaccumulative plants suitable for heavy metal-contaminated soil remediation were planted, and earthworm seedlings cultivated were put into the soil at the same time, and daily application of phytoremediation had the ability to activate heavy metals, promote plant growth, and improve the habitat conditions of earthworms. Environmentally friendly enzymes are used as liquid topdressing. Plants are harvested regularly after they grow luxuriantly. Earthworms are regularly captured by electric field driving after they grow and become fat. The heavy metal pollutants in the soil are absorbed, transformed, and accumulated by plants and earthworms. Carry out harmless disposal.

[0028] like figure 2 As shown, start water phytoremediation, and after dry...

Embodiment 2

[0035] Embodiment 2 Soil remediation of one round of dry cropping, one round of wet cropping and one round of dry cropping

[0036] like figure 1As shown, dry farming phytoremediation was started, and after heavy metal-contaminated soil was repaired, terrestrial hyperaccumulative plants suitable for heavy metal-contaminated soil remediation were planted, and earthworm seedlings cultivated were put into the soil at the same time, and daily application of phytoremediation had the ability to activate heavy metals, promote plant growth, and improve the habitat conditions of earthworms. Environmentally friendly enzymes are used as liquid topdressing. Plants are harvested regularly after they grow luxuriantly. Earthworms are regularly captured by electric field driving after they grow and become fat. The heavy metal pollutants in the soil are absorbed, transformed, and accumulated by plants and earthworms. Carry out harmless disposal.

[0037] like figure 2 As shown, start water ...

Embodiment 3

[0045] Embodiment 3 One round of dry cropping, one round of water cropping, one round of dry cropping and one round of soil restoration of hydroponics

[0046] like figure 1 As shown, dry farming phytoremediation was started, and after heavy metal-contaminated soil was repaired, terrestrial hyperaccumulative plants suitable for heavy metal-contaminated soil remediation were planted, and earthworm seedlings cultivated were put into the soil at the same time, and daily application of phytoremediation had the ability to activate heavy metals, promote plant growth, and improve the habitat conditions of earthworms. Environmentally friendly enzymes are used as liquid topdressing. Plants are harvested regularly after they grow luxuriantly. Earthworms are regularly captured by electric field driving after they grow and become fat. The heavy metal pollutants in the soil are absorbed, transformed, and accumulated by plants and earthworms. Carry out harmless disposal.

[0047] like fi...

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Abstract

The invention belongs to the field of soil remediation technologies, in particular to an ecological remediation method for heavy metal contaminated soil. According to the method, a firstly dry cultivation and then water cultivation alternated rotation plant remediation manner is adopted, terrestrial or aquatic hyperaccumulators are planted, cultivated earthworm larvae are thrown in soil during dry cultivation at the same time, and environment-friendly enzymes with effects of activating heavy metals, promoting plant growth and improving earthworm inhabiting conditions are applied as liquid top dressing at ordinary times; plants are harvested regularly after flourishing, the earthworms are captured regularly through electric field driving after growing to be large, soil heavy metal contaminants are absorbed, converted, accumulated and removed by the plants and the earthworms, and finally, the harvested plants or the captured earthworms are incinerated, cured and subjected to landfill treatment. The method has the characteristics of being low in remediation cost, simple to operate and manage and short in remediation cycle and avoiding secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of soil restoration, and in particular relates to an ecological restoration method for soil polluted by heavy metals. Background technique [0002] With the development of industry and agriculture and the rapid advancement of urbanization, the discharge intensity of mining and dressing wastewater, chemical electroplating wastewater, domestic sewage and other polluting wastewater is increasing, and the deposition of air pollutants such as coal combustion and industrial waste gas cannot be ignored. , these pollutants continue to accumulate in the soil environment, causing many farmlands in my country, especially basic farmland, to be polluted by heavy metals and other pollutants. The self-purification capacity of the soil environment is limited. If soil pollution is not effectively controlled and repaired, it will directly or indirectly It affects the pollution of surface water and groundwater, the output and sa...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10B09C1/08
CPCB09C1/08B09C1/10B09C1/105B09C2101/00
Inventor 吴彦宏蔡志强陈水程潘锡明钟永生
Owner 东莞市碧江源环保科技有限公司
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