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Method for rapidly restoring petroleum-contaminated soil

A technology for oil pollution and soil, applied in the field of contaminated soil remediation, can solve problems such as reducing the concentration of oil in polluted soil, and achieve the effects of improving the microbial environment, accelerating reduction, and realizing regeneration and reuse.

Active Publication Date: 2017-08-04
NANCHANG INST OF TECH
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  • Claims
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Problems solved by technology

[0004] Aiming at the relatively few researches on animal remediation of contaminated soil in the prior art, a method to speed up the remediation of oil-contaminated soil is provided. The remediation of oil-contaminated soil is simple, convenient, and easy to implement. Adding organic matter can improve the microbial environment of the soil , organic matter and bacteria-eating nematodes work together to speed up the reduction of oil concentration in polluted soil, and recycle the method of the present invention, which can effectively purify the soil and realize the regeneration and reuse of polluted soil

Method used

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  • Method for rapidly restoring petroleum-contaminated soil
  • Method for rapidly restoring petroleum-contaminated soil
  • Method for rapidly restoring petroleum-contaminated soil

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Embodiment 1

[0039] 1 Experimental part

[0040] 1.1 Experimental materials

[0041] Soil for test: The soil was collected from Hexian County, Anhui Province. The large particles in the soil were picked out, stones, gravel, and plant residues were removed, passed through a 2mm sieve, put into a -26°C refrigerator for three days, and then transferred to a 22°C biological Cultivate in the incubator for one week, adopt the repeated freezing and thawing method, and freeze and thaw repeatedly 5-7 times to kill the nematodes that originally existed in the soil. Isolate nematodes using the shallow dish method until no worms are present.

[0042] Petroleum for testing: Unprocessed crude oil for testing, petroleum crude oil comes from Sinopec Jinnan Oilfield, its basic physical and chemical properties are: total content of colloid and asphaltenes is 8.4%, and the relative density of the ground is 871.4 kg m 3 (25°C), the freezing point is 26.8°C, the ground viscosity is 18.7 mPa·s (60°C), and the...

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Abstract

The invention relates to the technical field of contaminated soil restoration, in particular to a method for rapidly restoring petroleum-contaminated soil. The method comprises the steps: inoculating and culturing bacterial-feeding nematodes on a nematode growth medium plate with gradual increase of petroleum concentration, and thus obtaining domesticated bacterial-feeding nematodes; adding organic matters into the petroleum-contaminated soil, and uniformly stirring and mixing, wherein the added content of the organic matters is 0.5-1% of the quality of the petroleum-contaminated soil; inoculating the domesticated bacterial-feeding nematodes into the petroleum-contaminated soil with the organic matters, and restoring the soil by utilizing the bacterial-feeding nematodes, the organic matters and microorganisms in the petroleum-contaminated soil. The method for restoring the petroleum-contaminated soil is simple and convenient and is easy to implement. The added organic matters can improve the microbial environment of soil, and the organic matters and the bacterial-feeding nematodes are combined to act so as to accelerate reducing the petroleum concentration of the contaminated soil. By recycling the method, the method can effectively purify the soil and realize the reuse of the contaminated soil.

Description

technical field [0001] The invention belongs to the technical field of remediation of contaminated soil, and in particular relates to a method for accelerating the remediation of petroleum-contaminated soil. Background technique [0002] Soil nematodes are one of the main functional groups of soil animals. They are the most abundant metazoans in the soil. They are widely distributed in the soil of various habitats, and the number can reach 7.6×10 5 -9.2×10 6 / m 2 . Soil nematodes are mainly divided into four categories according to trophic groups: bacteria-eating nematodes, fungus-eating nematodes, herbivorous nematodes and omnivorous nematodes. Among them, the number of bacteria-eating nematodes in the farmland ecosystem accounts for more than 60%, and the proportion in the rhizosphere soil Higher, up to about 90%, has important ecological functions in the soil ecosystem. [0003] At present, there have been many studies on phytoremediation and microbial remediation of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
CPCB09C1/10
Inventor 周际海樊后保濮海燕袁颖红李威廖迎春黄荣霞唐嘉婕
Owner NANCHANG INST OF TECH
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