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Comprehensive remediation method for heavy metal contaminated soil

A technology of polluted soil and remediation method, applied in the field of comprehensive remediation of heavy metal contaminated soil, can solve the problems of great harm, difficult treatment, soil pollution, etc., and achieve the effects of high absorption efficiency, wide absorption range and good environmental friendliness

Inactive Publication Date: 2020-06-05
贵州万通环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, soil pollution caused by heavy metals is very harmful and difficult to deal with

Method used

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  • Comprehensive remediation method for heavy metal contaminated soil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The present embodiment provides a comprehensive restoration method for heavy metal-contaminated soil, which includes:

[0027] S1. Adjust the pH of the heavy metal-contaminated soil to be remediated to 6~7.

[0028] S2. Sow mustard seeds in the conditioned heavy metal contaminated soil at a density of 30 plants / m 2 .

[0029] S3. While sowing mustard seeds, pour 100 ml of phosphate-solubilizing bacteria culture solution into the seeding pit of mustard seeds. Among them, the phosphorus-dissolving bacteria of the phosphorus-dissolving bacteria in the culture solution of the phosphorus-dissolving bacteria are Bacillus, and the content is 5.0×10 7 CFU / ml.

[0030] S4. Backfill the sowing pit and keep the soil temperature at 35°C for 48 hours after sowing. It is then planted in the usual way, with regular water and fertilizer applications.

Embodiment 2

[0032] The present embodiment provides a comprehensive restoration method for heavy metal-contaminated soil, which includes:

[0033] S1. Adjust the pH of the heavy metal-contaminated soil to be remediated to 5~6.

[0034] S2. Sow mustard seeds in the conditioned heavy metal contaminated soil at a density of 20 plants / m 2 .

[0035] S3. While sowing mustard seeds, pour 50 ml of phosphate-solubilizing bacteria culture solution into the seeding pit of mustard seeds. Among them, the phosphorus-dissolving bacteria of the phosphorus-dissolving bacteria in the culture solution of phosphorus-dissolving bacteria are Pseudomonas, and the content is 8.0×10 7 CFU / ml.

[0036] S4. Backfill the sowing pit and keep the soil temperature at 35°C for 48 hours after sowing. It is then planted in the usual way, with regular water and fertilizer applications.

Embodiment 3

[0038] The present embodiment provides a comprehensive restoration method for heavy metal-contaminated soil, which includes:

[0039] S1. Adjust the pH of the heavy metal-contaminated soil to be remediated to 4~5.

[0040] S2. Sow mustard seeds in the conditioned heavy metal contaminated soil at a density of 35 plants / m 2 .

[0041] S3. While sowing the mustard seeds, pour 80ml of phosphate-solubilizing bacteria culture solution into the mustard seed sowing pit. Among them, the phosphorus-dissolving bacteria of the phosphorus-dissolving bacteria in the culture solution of the phosphorus-dissolving bacteria are Bacillus, and the content is 6.0×10 7 CFU / ml.

[0042] S4. Backfill the seeding pit and keep the soil temperature at 25°C for 48 hours after sowing. It is then planted in the usual way, with regular water and fertilizer applications.

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Abstract

A comprehensive remediation method for heavy metal contaminated soil. The invention relates to the technical field of soil pollution remediation. The method comprises the following steps: with leaf mustard or rape as a plant for absorbing heavy metals, mixing the plants with phosphate solubilizing bacteria, wherein the root exudate of the plant can provide nutrient substances required by the survival of the phosphate-solubilizing bacteria, and various organic acids secreted by the phosphate-solubilizing bacteria can dissolve and convert heavy metals in the soil into phosphate, which can be quickly absorbed by the plant, so that the remediation effect of the plant on the soil is promoted. By means of the method, comprehensive remediation method for the heavy metal contaminated soil has theadvantages of being good in environmental friendliness, high in absorption efficiency of heavy metal in the soil, wide in absorption range and good in practical value.

Description

technical field [0001] The invention relates to the technical field of soil pollution restoration, in particular to a comprehensive restoration method for heavy metal polluted soil. Background technique [0002] Soil is the natural environment on which human beings depend and an important resource for agricultural survival. The food, resource and environmental issues facing the world are closely related to soil. However, with the continuous acceleration of my country's industrialization, rural intensification and urbanization, the area of ​​contaminated soil continues to expand, and the problem of soil pollution is becoming more and more serious. [0003] Soil pollutants can be roughly divided into two categories: inorganic pollutants and organic pollutants. Inorganic pollutants mainly include acids, alkalis, heavy metals, salts, compounds of radioactive elements cesium and strontium, compounds containing arsenic, selenium, and fluorine. Organic pollutants mainly include o...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105
Inventor 王万田王帅王万海
Owner 贵州万通环保工程有限公司
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