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Method for plant restoration of zinc-contaminated soil

A technology for contaminated soil and phytoremediation, applied in the field of soil remediation, can solve the problems of high cost, serious secondary pollution, high cost, etc., and achieve the effects of strong tillering power, good growth and low cultivation cost.

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

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Problems solved by technology

[0004] The method of soil zinc remediation in the prior art has high cost, serious secondary pollution, and high cost. To a certain extent, it is not suitable for the remediation of heavy metal zinc in soil in my country. Therefore, it is particularly urgent to find a low-cost, efficient and pollution-free soil zinc remediation method

Method used

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

Examples

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Embodiment 1

[0028] The present embodiment provides a kind of method for phytoremediation of zinc-contaminated soil, comprising the steps of:

[0029] 1) Seedling cultivation of Moss inunica

[0030] 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 heavy metal zinc polluted soil when the moss grows to 5cm.

[0031] 2) Zinc-contaminated soil preparation:

[0032] The basic soil was taken from Suihua City, Heilongjiang Province, soil without heavy metal zinc pollution, dried the soil at 105°C for 8 hours, took 10kg and put it into a square plastic cultivation pot with a size of 40cm*40cm, and then sprayed ZnSO 4 .7H 2 O solution (using ZnSO 4 .7H 2...

Embodiment 2～3

[0035] The steps in Examples 2 and 3 are the same as in Example 1, except that the concentration of zinc-contaminated soil in Step 2 is 300 mg / kg and 600 mg / kg respectively.

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Abstract

The invention provides a method for plant restoration of zinc-contaminated soil. The method comprises the following step of transplanting carex duriuscula to the zinc-contaminated soil, wherein the concentration of zinc in the soil is preferably lower than 600 mg / kg. According to the method, carex duriuscula is utilized for restoration of the zinc-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 zinc, and can absorb and transfer zinc in the soil to the overground parts throughthe root systems, and the zinc 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 zinc-contaminated soil. Background technique [0002] Due to metal smelting, mechanical processing, atmospheric deposition, unreasonable discharge and use of zinc-containing sewage sludge, and excessive use of zinc-containing pesticides and fertilizers, my country's soil is facing a large area of ​​heavy metal zinc pollution. The trace amount of zinc entering the human body through the food chain can promote human growth, Development, however, excessive zinc can cause metabolic disorders in the human body and endanger human health. [0003] At present, the methods of soil zinc remediation are: soil solidification remediation method, which uses a curing agent and contaminated soil to mix in a certain proportion, and finally forms a solid mixture after solidification to realize the remediation of zinc-contaminated soil; electrod...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00Y02A40/22
Inventor 侯佩臣陈立平王成宋鹏王晓冬李爱学
Owner BEIJING RES CENT OF INTELLIGENT EQUIP FOR AGRI
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