Method for strengthening oil-polluted soil restoration by plant by utilizing mineralized refuse

A technology of mineralized garbage and restoration method, applied in the field of soil restoration, can solve the problems of low phytoremediation restoration efficiency and long restoration period, and achieve the effects of reducing soil ecotoxicity, reducing restoration cost, and expanding the scope of application

Inactive Publication Date: 2017-09-08
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the repair efficiency of phytoremediation is low and the repair period is long
Moreover, due to the strong inhibitory effect of petroleum pollutants on plant germination and growth, the application of phytoremediation is limited to low concentrations of petroleum-contaminated soils.

Method used

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  • Method for strengthening oil-polluted soil restoration by plant by utilizing mineralized refuse

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Mineralized waste with a landfill age of 8 years was collected in the sanitary landfill of domestic waste, passed through a sieve with an aperture of 10 mm, and mineralized waste with a particle size of less than 10 mm was obtained for use.

[0032] In air-dried petroleum-contaminated soil (petroleum hydrocarbon content 50g / kg), add the above-mentioned sieved mineralized garbage according to the mass ratio of mineralized garbage to petroleum-contaminated soil at a ratio of 1:1, and stir evenly. Table 1 shows the changes in the physical, chemical and biological properties of the contaminated soil before and after adding mineralized waste.

[0033] Table 1 Changes of soil physical, chemical and biological properties before and after adding mineralized waste

[0034]

[0035] From the data in Table 1, it can be seen that after adding mineralized waste, the ecotoxicity of the soil was greatly reduced, and the activity of petroleum hydrocarbon degrading enzymes, the numbe...

Embodiment 2

[0042] Mineralized waste with a landfill age of 8 years was collected in the sanitary landfill of domestic waste, passed through a sieve with an aperture of 10 mm, and mineralized waste with a particle size of less than 10 mm was obtained for use.

[0043] In air-dried petroleum-contaminated soil (petroleum hydrocarbon content 50g / kg), add the above-mentioned mineralized garbage after sieving according to the mass ratio of mineralized garbage to petroleum-contaminated soil at 1:9, 1:3, 1:1, and 3:1, Stir well.

[0044] After the mineralized waste is mixed with the petroleum-contaminated soil, the mixed soil is obtained, and the alfalfa seeds are soaked in 2% hydrogen peroxide for 20 minutes to be sterilized, washed and then evenly sown in the mixed soil, the seeding rate is 1.2kg / mu, and the upper part is covered with soil 0.5~1.0cm. At the same time, do non-mineralized waste control group (including plants).

[0045] After sowing, the temperature of the mixed soil was contr...

Embodiment 3

[0049] Mineralized waste with a landfill age of 8 years was collected in the sanitary landfill of domestic waste, passed through a sieve with an aperture of 10 mm, and mineralized waste with a particle size of less than 10 mm was obtained for use.

[0050] In air-dried petroleum-contaminated soil (petroleum hydrocarbon content 50g / kg), add the above-mentioned sieved mineralized garbage according to the mass ratio of mineralized garbage to petroleum-contaminated soil at a ratio of 1:1, and stir evenly.

[0051] After the mineralized waste is mixed with the petroleum-contaminated soil, the mixed soil is obtained, and the alfalfa seeds are soaked in 2% hydrogen peroxide for 20 minutes to be sterilized, washed and then evenly sown in the mixed soil, the seeding rate is 1.2kg / mu, and the upper part is covered with soil 0.5~1.0cm.

[0052] After sowing, the temperature of the mixed soil was controlled to be 25°C, and water was added regularly to maintain the mixed soil moisture cont...

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Abstract

The invention belongs to the field of soil restoration, particularly relates to a method for strengthening oil-polluted soil restoration by plants by utilizing mineralized refuse. The method provided by the invention includes the following steps: a) after screening the mineralized refuse, mixing the mineralized refuse with the oil-polluted soil to obtain the mixed soil, wherein the mesh size for screening is 10-20 mm, and the landfill age of the mineralized refuse is 5 to 15 years; b) planting plants into the mixed soil; after petroleum hydrocarbon in the mixed soil is degraded, restored soil is obtained. According to the invention, by adding mineralized refuse with a specific particle size and a landfill age to the oil-polluted soil, the growth of soil microbes and soil plants are greatly improved, thereby increasing the degradation effect and degradation rate of petroleum hydrocarbon in the soil; in addition, adding mineralized refuse to the oil-polluted soil can dilute the concentration of petroleum hydrocarbon in the soil, reduce the inhibitory effect of petroleum pollutants on soil microbes and plants, and expand the application range of plant restoration.

Description

technical field [0001] The invention belongs to the field of soil remediation, and in particular relates to a method for using mineralized garbage to strengthen plants to remediate petroleum-contaminated soil. Background technique [0002] With the rapid development of the petroleum and petrochemical industry, the soil pollution caused by production processes such as petroleum exploration, storage, transportation and leakage accidents is becoming more and more serious. It not only causes soil salinization and poisoning, leading to soil damage and waste, but also its toxic substances can enter the food chain system through crops and groundwater, and eventually directly endanger human beings. Therefore, it is of great significance to restore oil-contaminated soil. [0003] In recent years, bioremediation has become the mainstream method for oil-contaminated soil remediation due to its advantages of being more economical than physical and chemical remediation methods, with thor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/10
CPCB09C1/00B09C1/105
Inventor 刘庆梅李启彬刘丹常乐昝丽王佩瑾苟雪梅
Owner SOUTHWEST JIAOTONG UNIV
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