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Restoration method for petroleum-contaminated soil by coupling bio-charcoal loaded oxidation aid and microbe and plant

An oxidation aid and oil pollution technology, applied in the field of oil-contaminated soil treatment, can solve the problems of limited oil-contaminated soil remediation capacity, secondary pollution, and difficulty in completely eliminating oil pollutants, etc. , the effect of effectively degrading pollutants

Inactive Publication Date: 2019-02-22
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for remediating petroleum-contaminated soil with biochar-loaded oxidation aids coupled with microbial plants, which solves the problem that secondary pollution is easily caused by physical remediation and chemical remediation in the process of remediating petroleum-contaminated soil, while biological remediation and plant remediation The remediation method has limited ability to repair oil-contaminated soil, and it is difficult to completely eliminate the oil pollutants in the soil

Method used

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Examples

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Embodiment 1

[0030] A method for biochar-loaded oxidation aid coupled with microbial phytoremediation of petroleum-contaminated soil, comprising the following steps:

[0031] S1, collect corn stalks, dry them at 80°C, and crush them into 1-2 cm segments with a pulverizer; then put the crushed corn stalks in a biochar furnace, and pyrolyze them under anoxic conditions at 450°C for 3 hours. Cool to room temperature after decomposing to prepare biochar;

[0032] Soak the obtained biochar into a mixture of 15g / L citric acid aqueous solution, 12g / L ferrous chloride aqueous solution, and 20g / L ethylenediaminetetraacetic acid disodium aqueous solution according to the volume ratio of 1:1:1. solution, magnetically stirred for 1 hour, and dried at 75°C after stirring to obtain biochar-loaded oxidation aids;

[0033] S2, the biochar-loaded oxidation aid is 200g / m 2 The amount of application was evenly applied to the surface layer of petroleum-contaminated soil (the moisture content of the surface ...

Embodiment 2

[0039] A method for biochar-loaded oxidation aid coupled with microbial phytoremediation of oil-contaminated soil, comprising the following steps:

[0040] S1, collect rice stalks and corn stalks respectively, dry them at 78°C and crush them into 1-2 cm segments with a pulverizer; then mix the crushed straws and place them in a biochar furnace, and dry them at 420°C Oxygen pyrolysis for 3 hours, cooling to room temperature after pyrolysis, and preparing biochar;

[0041] Soak the obtained biochar into a mixture of 13g / L citric acid aqueous solution, 15g / L ferrous chloride aqueous solution, and 18g / L ethylenediaminetetraacetic acid disodium aqueous solution in a volume ratio of 1:1:1 , magnetically stirred for 1 hour, and then dried at 75°C after stirring to obtain a biochar-loaded oxidation aid;

[0042] S2, the biochar-loaded oxidation aid is 600g / m 2The amount of application was evenly applied to the surface layer of petroleum-contaminated soil (the moisture content of the...

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Abstract

The invention discloses a restoration method for petroleum polluted soil by coupling bio-charcoal loaded oxidation aid and microbe and plant. The restoration method includes the following steps: S1, the bio-charcoal loaded oxidation aid is put into the surface of petroleum-contaminated soil for 80 to 100 days when being placed and aged; S2, after the soil is aged, water is sprinkled on the surfacesoil to make the water content reach 50-60%, then the soil pH is adjusted to 7-8, then petroleum degrading bacteria is added to the soil for fermentation; S3, after soil is fermented, different proportions of shrub plants are planted in soil and after the plants are matured, the plants are removed as a whole; and S4, is the steps 1-3 are repeatedly carried out until the content of petroleum contaminants in the soil of petroleum contaminants is detected to no greater than 4.5 grams per kilogram. By adopting the in-situ restoration technology, the environment can not be damaged during the restoration process, secondary pollution can not be caused, green and environmentally friendly purpose is achieved, and a green, circular, composite restoration mode is achieved with good restoration effect.

Description

technical field [0001] The invention belongs to the technical field of petroleum-contaminated soil treatment, and in particular relates to a method for remediating petroleum-contaminated soil with biochar-loaded oxidation aids coupled with microorganisms and plants. Background technique [0002] Petroleum is one of the most important fossil fuels worldwide. During the development of the petroleum industry, especially in the stages of exploration, mining, transportation, and processing, oil will enter the soil environment and cause soil pollution. According to statistics, there are about 6×10 5 Tons of oil enter the environment through various channels, and the area of ​​oil-contaminated soil is as high as 4.8×10 6 hm 2 . [0003] Petroleum pollutants are complex organic pollutants that are toxic, mutagenic, and carcinogenic to humans, and are extremely harmful to regional soil / water / atmospheric ecological environments. Therefore, the development of efficient oil-contami...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10B09C1/08
CPCB09C1/08B09C1/10B09C1/105
Inventor 涂志华范志平陈金辉王琼魏小娜李法云孙学凯
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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