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Method for plant restoration of copper-contaminated soil

A technology for phytoremediation and copper pollution, applied in the field of soil remediation, can solve problems such as unsuitable for heavy metal soil remediation, technical complexity, secondary pollution, etc., and achieve high copper transfer efficiency, low cultivation cost, and resource saving effects

Inactive Publication Date: 2019-04-16
BEIJING RES CENT OF INTELLIGENT EQUIP FOR AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The leaching method and chemical precipitation method are costly, complex in technology, and face the problem of secondary pollution in the remediation of heavy metal copper-contaminated soil, which are not suitable for the national conditions of heavy metal soil remediation in my country.

Method used

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  • Method for plant restoration of copper-contaminated soil
  • Method for plant restoration of copper-contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The present embodiment provides a method for phytoremediation of copper-contaminated soil, comprising the steps of:

[0028] 1) Seedling cultivation of Moss inunica

[0029] Cuncao moss was planted in early April, the amount of seed per mu was 0.5kg, the soil was disinfected and sterilized with 50% carbendazim 800 times solution before sowing, 40 kg of calcium magnesium phosphorus base fertilizer was applied per mu, and the soil surface was covered with 1cm thick soil after sowing , control the soil moisture, promote seed germination, and transplant the moss to the heavy metal copper polluted soil when the moss grows to 5cm.

[0030] 2) Copper-contaminated soil preparation:

[0031] The basic soil was taken from Suihua City, Heilongjiang Province, without heavy metal copper pollution. The soil was dried at 105°C for 8 hours, and 10kg was put into a square plastic culture pot with a size of 40cm*40cm, and then sprayed with CuSO 4 ·5H 2 O solution, 50 mg / kg of copper-c...

Embodiment 2～3

[0034] The steps in Examples 2 and 3 are the same as those in Example 1, except that the concentration of copper-contaminated soil in Step 2 is 100 mg / kg and 200 mg / kg respectively.

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Abstract

The invention provides a method for plant restoration of copper-contaminated soil. The method comprises the following step of transplanting carex duriuscula to the copper-contaminated soil, wherein the concentration of copper in the soil is preferably lower than 200 mg / kg. According to the method, carex duriuscula is utilized for restoration of the copper-contaminated soil and has robust root systems, strong tillering capacity, high growth speed, drought resistance and soil depletion resistance; meanwhile, carex duriuscula can be harvested repeatedly, and many new plants can be propagated by simply planting carex duriuscula once since underground parts continuously produce rhizomes; carex duriuscula is resistant to copper, and can absorb and transfer copper in the soil to the overground parts through the root systems, and the copper content in the soil can be controlled to be at the safe level by harvesting the overground parts.

Description

technical field [0001] The technical field of soil remediation of the present invention, more specifically, relates to a method for phytoremediation of copper-contaminated soil. Background technique [0002] Copper is an essential trace element for plant growth. A small amount of copper can promote the maintenance of normal physiological functions of plants and human body, but excessive copper will cause damage to the growth and development of plants and human body. Random stacking of copper slag, random discharge of copper-containing sewage and copper-containing sludge from metal smelting, and unreasonable use of copper-containing pesticides and fertilizers have caused a large amount of heavy metal copper pollution in my country's soil, causing excessive accumulation of copper entering the human body through the food chain, and causing human metabolic disorders. , endangering human health. The copper content in the soil around some copper smelters can reach 150-1900 mg / kg, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 王成陈立平侯佩臣李爱学何璐璐陈泉
Owner BEIJING RES CENT OF INTELLIGENT EQUIP FOR AGRI
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