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Process of repairing heavy metal polluted soil with both oudemansiella radicata and Tricholoma lobynsis

A technology of polluted soil and joint restoration, applied in the field of resources and environment, can solve the problems of long growth cycle of plants and troublesome follow-up treatment, and achieve the effect of short growth cycle and strong ability to enrich heavy metal ions

Inactive Publication Date: 2009-09-02
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Advantages of phytoremediation: easy planting, large enrichment, heavy metals in the soil can be removed; disadvantages of phytoremediation: long plant growth cycle (1 year for herbs, 3-5 years for woody plants, seriously affecting agricultural production), troublesome follow-up treatment (incineration It is the main technology, but it pollutes the air) and the plants are not easy to rot, so that the existing phytoremediation technology actually only plays a role in enriching and concentrating heavy metal ions in the soil. After the heavy metal ions are absorbed and transported from the soil to the plant, although the soil However, the heavy metal ions have not been completely removed from the environment, and they still exist in the plants in the environment. Whether it is burned or decayed, the heavy metal ions enriched in the plants will return to the environment or soil. The role of pollution transport to other areas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In this example, the joint planting of Rhizome Mushroom and Golden Fortune Mushroom on polluted soil to in-situ enrich metals such as cadmium (Cd), lead (Pb), chromium (Cr), copper (Cu), zinc (Zn) in the soil ion.

[0024] Restoration process: preparation of mushroom culture medium → fermentation of base material → preparation of mushroom strains → laying of fermented base material in soil → planting two types of mushrooms in polluted soil (in-situ restoration of polluted soil) → growth of mushrooms and enrichment of heavy metals → Harvest mushrooms → prepare mushroom slurry enriched with heavy metal mushrooms → put the mushroom slurry into a plastic electrophoresis tank, adjust the pH value and electrolyte solution → insert the electrophoresis tank into a two-electrode system of anode and cathode, connect the DC stabilized power supply, Regulate the voltage → electrolytically analyze the metal ions (cadmium, lead, chromium, copper, zinc) in the mushroom slurry → deposi...

Embodiment 2

[0043] In this example, heavy metals are removed ectopically by a box-type multi-zone cultivation system (restored by moving soil and planting mushrooms). By collecting heavy metal-contaminated soil, and carrying out soil-covering culture of long root mushroom and golden blessing mushroom, the metal ions such as lead, chromium, copper and zinc in the soil are enriched.

[0044] Restoration process: preparation of mushroom culture medium → fermentation of base material → preparation of mushroom strains → laying of fermented base material in box-type soil → collection of heavy metal-contaminated soil layer → ectopic covering of polluted soil and interplanting mushrooms with long root mushrooms and gold Mushrooms → Mushroom growth and heavy metal enrichment → Mushroom harvesting → Mushrooms enriched with heavy metals to prepare mushroom slurry → Mushroom slurry is placed in a plastic electrophoresis tank, pH value and electrolyte are adjusted → Electrophoresis tank is inserted int...

Embodiment 3

[0052] In this example, heavy metals are removed ectopically by a box-type multi-zone cultivation system (restored by moving soil and planting mushrooms). By collecting heavy metal-contaminated soil, and carrying out soil-covering culture of long root mushroom and golden blessing mushroom, the metal ions such as lead, chromium, copper and zinc in the soil are enriched.

[0053] The restorative process of this example is the same as that of the second embodiment except for the follow-up treatment.

[0054] The subsequent processing steps of this example are as follows:

[0055] About 3 months later, the long root mushroom and golden blessing mushroom are mature, the mushrooms are harvested, crushed, homogenized, rotted, filtered, and 0.8L mushroom slurry is made per kg of fresh mushrooms, and Na 2 S 2 o 5 / H 2 SO 4 After acidification (pH2-3), add chelating agent / NaOH (pH8-9) for chelating reaction, then add precipitant or flocculant to obtain heavy metal ion compound prec...

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Abstract

The invention belongs to the technical field of resources and environment, and relates to a method for jointly repairing heavy metal-contaminated soil by root mushrooms and golden blessing mushrooms. The method is to plant root mushrooms and golden blessing mushrooms on the polluted soil at the same time. When the bacteria are mature, harvest the mushrooms The mushroom body is processed to obtain a mushroom slurry rich in heavy metal ions, and then the heavy metal ions in the mushroom slurry are removed by chemical electrophoresis or chelation precipitation. The present invention takes the long root mushroom and golden blessing mushroom as the main bioconcentrators, and fully utilizes the characteristics that the two kinds of mushrooms can grow under similar soil conditions at the same time, the growth period is short, the field cultivation technology is mature, and the ability to enrich heavy metal ions is strong. Combined with simple and mature chemical methods such as chemical electrophoresis or chelation precipitation, heavy metal ions can be completely removed from the environment.

Description

Technical field: [0001] The invention belongs to the technical field of resources and environment, and in particular relates to a method for jointly repairing soil polluted by heavy metals with chrysanthemum and jinfu mushroom. Background technique: [0002] Soil is the main material basis for human survival. With the process of industrialization and urbanization, soil heavy metal pollution is becoming more and more serious, including cadmium (Cd), lead (Pb), chromium (Cr), mercury (Hg), arsenic (As) , Nickel (Ni), copper (Cu), zinc (Zn) etc. are more common heavy metal pollution. The world's average annual emission of Hg is about 15,000 tons, Cu is 3.4 million tons, Pb is 5 million tons, Mn is 15 million tons, and Ni is 1 million tons, which seriously pollutes the environment. At present, about 25 million hectares of farmland soil is polluted by heavy metals in my country, and as many as 12 million tons of grain are polluted by heavy metals every year, causing direct econo...

Claims

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Application Information

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IPC IPC(8): B09C1/10C02F1/62
Inventor 徐恒陈坤雷雨季金虎辜文博姬凌云
Owner SICHUAN UNIV
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