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A kind of remediation method of heavy metal polluted soil

A technology of polluted soil and remediation method, applied in the restoration of polluted soil and other directions, can solve the problems of single heavy metal remediation element, low heavy metal absorption efficiency, long restoration time, etc., achieving low planting difficulty, good soil treatment effect, and beautifying the environment. Effect

Active Publication Date: 2018-07-24
SHANGHAI JOKOSON ENVIRONMENT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 2. To overcome the problems of low heavy metal absorption efficiency of resistant crops, single heavy metal repair elements, too long repair time, and low survival rate

Method used

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  • A kind of remediation method of heavy metal polluted soil

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Effect test

Embodiment 1

[0044] A method for joint restoration of heavy metal-contaminated soil by magnetotactic bacteria and plants, comprising the following steps:

[0045] 1) Add the magnetotactic bacteria culture medium to the soil polluted by heavy metals, the addition ratio of the magnetotactic bacteria culture medium is 50mL of the magnetotactic bacteria liquid culture medium per square meter of heavy metal contaminated soil, and Inoculate 9.0×10 9 A magnetotactic bacterium, plowing the soil with a thickness of 10 cm on the surface of the heavy metal polluted soil, so that the magnetotactic bacterium culture medium, the magnetotactic bacterium and the heavy metal polluted soil are fully mixed;

[0046] 2) Cultivate for 45 days, add magnetotactic bacteria medium to the 3cm thick soil on the surface of heavy metal polluted soil, and add 30mL of magnetotactic bacteria liquid medium per square meter of heavy metal polluted soil, and irrigate the soil to make heavy metal pollution The soil is kept ...

Embodiment 2

[0056] A method for joint restoration of heavy metal-contaminated soil by magnetotactic bacteria and plants, comprising the following steps:

[0057] 1) Add the magnetotactic bacteria culture medium to the soil polluted by heavy metals, the addition ratio of the magnetotactic bacteria culture medium is 80mL of magnetotactic bacteria liquid culture medium per square meter of heavy metal contaminated soil, and add 80mL of magnetotactic bacteria liquid culture medium per square meter of heavy metal contaminated soil Inoculate 1.0×10 10 A magnetotactic bacterium, plow the soil with a thickness of 12 cm on the surface of the heavy metal polluted soil, so that the magnetotactic bacterium culture medium, the magnetotactic bacterium and the heavy metal polluted soil are fully mixed;

[0058] 2) Cultivate for 50 days, add magnetotactic bacteria medium to the 5cm-thick soil on the surface of heavy metal-contaminated soil, and add 50mL of magnetotactic bacteria liquid medium per square m...

Embodiment 3

[0068] A method for joint restoration of heavy metal-contaminated soil by magnetotactic bacteria and plants, comprising the following steps:

[0069] 1) Add the magnetotactic bacteria culture medium to the soil polluted by heavy metals, the addition ratio of the magnetotactic bacteria culture medium is 60mL of the magnetotactic bacteria liquid culture medium per square meter of heavy metal contaminated soil, and Inoculate 9.5×10 9 ~ 1.0×10 10 A magnetotactic bacterium, plow the soil with a thickness of 11 cm on the surface of the heavy metal polluted soil, so that the magnetotactic bacterium culture medium, the magnetotactic bacterium and the heavy metal polluted soil are fully mixed;

[0070] 2) Cultivate for 49 days, add magnetotactic bacteria medium to the 4cm-thick soil on the surface of heavy metal-contaminated soil, and add 40mL of magnetotactic bacteria liquid medium per square meter of heavy metal-contaminated soil, and irrigate the soil to make heavy metal pollution ...

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Abstract

The invention provides a remediation method of heavy metal contaminated soil. The remediation method particularly comprises the following steps: (1) adding a magnetotactic bacteria culture medium into heavy metal contaminated soil, inoculating magnetotactic bacteria and performing ploughing; (2) adding the magnetotactic bacteria culture medium into heavy metal contaminated soil and arranging a magnetic field; (3) collecting the surface layer of heavy metal contaminated soil; (4) leaching heavy metal contaminated soil with water, re-inoculating metal activation bacteria, and back-filling; (5) transplanting bamboo willow on heavy metal contaminated soil, irrigating, and after 1-2 years, wholly removing bamboo willow; and (6) circularly repeating the step (1) to the step (5) for two to four times. Compared with the prior art, the remediation method of heavy metal contaminated soil has the advantages that magnetotactic bacteria are easy to collect, bamboo willow is short in growth cycle and high in heavy metal absorption rate; the heavy metal activation bacteria facilitate heavy metal absorption of plants; and the remediation method can simultaneously remediate soil contaminated by various heavy metals, avoids secondary contamination of soil and is suitable for remediation of large-area contaminated soil.

Description

technical field [0001] The invention relates to the field of contaminated soil treatment, in particular to a method for remediating heavy metal-contaminated soil. Background technique [0002] Soil is not only an important part of the earth's ecological circle, but also one of the important natural resources that human beings rely on for survival. With the development of industrial activities such as mineral mining and smelting, and agricultural activities such as sewage irrigation, application of sludge and low-quality chemical fertilizers, harmful heavy metals such as Cd and Pb continue to enter the soil environment, causing pollution to normal production and life. Therefore, the control of soil heavy metal pollution is of great significance to the ecological civilization and the healthy life of human beings. [0003] The traditional remediation methods for soil heavy metal pollution are usually physical and chemical methods, such as dilution and soil covering method, vit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/10
Inventor 马新攀
Owner SHANGHAI JOKOSON ENVIRONMENT ENG
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