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Remediation method for oil-contaminated soil

A technology of oil pollution and remediation method, applied in the field of remediation of contaminated soil, to achieve the effect of easy implementation, promotion of increase, and realization of regeneration and reuse

Active Publication Date: 2017-02-22
NANCHANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for remediating petroleum-contaminated soil. The method uses bacteria-eating nematodes to remediate petroleum-contaminated soil. The method is simple, convenient, and easy to implement. To purify the soil and realize the regeneration and reuse of polluted soil, it has very prominent social and economic benefits under the circumstances that the area of ​​cultivated land is decreasing and the land pollution is becoming more and more severe.

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Embodiment 1

[0029] 1 Experimental part

[0030] 1.1 Experimental materials

[0031] Soil for test: The soil was collected from Hexian County, Anhui Province. Large particles in the soil were picked out, stones, gravel, and plant residues were removed, passed through a 2 mm sieve, put into a -26°C refrigerator for three days, and then transferred to 22°C Cultivate in the biological 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.

[0032] Petroleum for testing: Petroleum crude oil comes from Sinopec Jinnan Oilfield, and its basic physical and chemical properties are: the relative density of the ground is 871.4 kg·m 3 (25 ℃), the ground viscosity is 18.7 mPa s (60 ℃), the freezing point is 26.8 ℃, the wax content is 24.7%, and the total content of gum and asphaltene is 8.4%.

[0033] Prepara...

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Abstract

The invention discloses a remediation method for oil-contaminated soil, and relates to the technical field of contaminated soil remediation. Bacterial-feeding nematodes are used for remediating the oil-contaminated soil. The method is simple, convenient to use and easy to implement, the oil concentration of the contaminated soil can be effectively reduced, therefore, the function of purifying the soil is achieved, and regeneration and reutilization of the contaminated soil are achieved. Under the conditions that at present, the agricultural acreage is increasingly reduced and land pollution is increasingly severe, the method has very outstanding social and economic benefits.

Description

technical field [0001] The invention relates to the technical field of contaminated soil remediation. Background technique [0002] Soil nematodes are one of the main functional groups of soil animals, and 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] A large number of studies have shown that soil nematodes widely exist in oil-contaminated soils, and bacteria-eating nematodes are the dominant group. Xiao Nengwen et al. found that the numbe...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/10B09C2101/00
Inventor 周际海濮海燕黄荣霞樊后保袁颖红李威唐嘉婕程坤吴雪艳袁东东
Owner NANCHANG INST OF TECH
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