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Application and method of utilizing enriching plant in repairing lead polluted soil

A technology of lead-contaminated soil and super-accumulating plants, applied in the field of phytoremediation, can solve the problem of poor understanding of the long-term stability of soil ecosystem, soil organic matter and structural water are easily destroyed, and the biomass of lead super-accumulating plants is small To achieve the effect of reducing soil wind erosion, solving lead pollution, and reducing repair costs

Inactive Publication Date: 2007-01-03
云南省环境科学研究院(中国昆明高原湖泊国际研究中心)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this technology is that soil organic matter and structural water are easily destroyed, and driving soil moisture requires a lot of energy
This method has a certain effect, solidifying heavy metals in situ, greatly reducing the cost, but it also has certain limitations: it only changes the existing form of heavy metals in the soil, and it is not well understood about the long-term stability of the soil and its impact on the ecosystem. research in this area
However, most of the discovered lead hyperaccumulative plants have small biomass and slow growth, which greatly limits their application in remediation of polluted soils.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for repairing lead-contaminated soil by using hyperaccumulator plants, using castor seeds commonly used in Yunnan, TCO-202, introduced by the Oil Plant Institute of Yunnan Academy of Agricultural Sciences in 1995, and cultivated in Yunnan is a perennial variety. Apply farmyard manure to the soil as base fertilizer before sowing, and the application rate is generally controlled at 10000kg / hm according to the soil fertility 2 , in places where there is no organic fertilizer application, general calcium can be used instead, and the application rate is 300kg / hm 2 , one-time application. Sow according to plant spacing × row spacing = 0.5m × 1m, and the planting density is 19995 plants / hm 2 . According to the method of field management, sow and water once, pruning and topping are not carried out during the growth period of castor bean in that year, and the same winter and spring management is carried out in winter, and felling is carried out at a distance of 40 cm ...

Embodiment 2

[0022] A method for repairing lead-contaminated soil by using hyperaccumulator plants, using castor seeds commonly used in Yunnan, TCO-202, introduced by the Oil Plant Institute of Yunnan Academy of Agricultural Sciences in 1995, and cultivated in Yunnan is a perennial variety. Apply farmyard manure to the soil as base fertilizer before sowing, and the application rate is generally controlled at 20000kg / hm according to the soil fertility 2 , in places where there is no organic fertilizer application, general calcium can be used instead, and the application rate is 750kg / hm 2 , one-time application. Sow according to plant spacing × row spacing = 0.5m × 1m, and the planting density is 19995 plants / hm 2 . According to the method of field management, sow and water once, pruning and topping are not carried out during the growth period of castor bean in that year, and the same winter and spring management is carried out in winter, and felling is carried out at a distance of 40 cm ...

Embodiment 3

[0024] A method for repairing lead-contaminated soil by using hyperaccumulator plants, using castor seeds commonly used in Yunnan, TCO-202, introduced by the Oil Plant Institute of Yunnan Academy of Agricultural Sciences in 1995, and cultivated in Yunnan is a perennial variety. Apply farmyard manure to the soil as base fertilizer before sowing, and the application rate is generally controlled at 15000kg / hm according to the soil fertility 2 , in places where there is no organic fertilizer application, general calcium can be used instead, and the application rate is 525kg / hm 2 , one-time application. Sow according to plant spacing × row spacing = 0.4m × 0.8m, and the planting density is 20000 plants / hm 2 . According to the method of field management, sow and water once, pruning and topping are not carried out during the growth period of castor bean in that year, and the same winter and spring management is carried out in winter, and felling is carried out at a distance of 40 c...

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Abstract

The present invention relates to botanical repairing technology of polluted environment, and is especially the method of utilizing super enriching plant in repairing heavy metal contaminated soil. The method includes planting castor in lead contaminated soil for the root system of castor to absorb lead from soil and removing the castor in blooming stage or maturing stage from the contaminated soil. The said method can eliminate lead from the contaminated soil to repair lead contaminated soil without affecting the physical and chemical properties, and has low power consumption, low cost, easy operation, no secondary pollution and other advantages.

Description

technical field [0001] The invention relates to a phytoremediation technology for polluted environment, in particular to a method for remediating soil polluted by heavy metals by using hyperaccumulator phytoremediation. technical background [0002] There are usually two ways for heavy metals to pollute soil: one is the environmental pollution caused by metal mining activities. Serious soil; heavy metal polluted soil caused by leaching and other reasons during the stacking of mining waste rocks; soil pollution caused by mine wastewater containing high concentrations of heavy metals, etc. The second is the heavy metal-contaminated soil caused by industrial sewage irrigating farmland. The heavy metal content in the soil of non-ferrous metal mining areas in southeastern Yunnan Province generally exceeds the standard. The average lead content in the soil is 500-18096 mg / kg, with an exceeding rate of 60-100%. Soil lead pollution is quite serious. The mountains near the smelter ...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10
Inventor 刘晓海高云涛贺彬王志芸宁平曾向东王伟陈同斌廖晓勇董琨文斌
Owner 云南省环境科学研究院(中国昆明高原湖泊国际研究中心)
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