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Method for remediating petroleum-contaminated soil through coupling charcoal-loaded surface active agent and microorganism plant

A surfactant and oil-polluted technology, applied in the field of oil-contaminated soil treatment, can solve problems such as secondary pollution, difficulty in completely eliminating oil pollutants, and limited remediation capabilities of oil-polluted soil, achieving good results

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 biochar-loaded surfactant coupling microbial phytoremediation of petroleum-contaminated soil, which solves the problem that physical remediation and chemical remediation easily cause secondary pollution in the process of remediating petroleum-contaminated soil, while biological remediation and phytoremediation The ability to repair oil-contaminated soil is limited, and it is difficult to completely eliminate oil pollutants in the soil

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0030] A method for biochar-loaded surfactant coupling microbial phytoremediation of oil-contaminated soil, comprising the following steps:

[0031] S1, collect rice stalks and corn stalks respectively, dry them at 80°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 450°C Oxygen pyrolysis for 3 hours, cooling to room temperature after pyrolysis, and preparing biochar;

[0032] The obtained biochar is soaked into a 4g / L sodium lauryl sulfate aqueous solution, an 8g / L triton x-100 aqueous solution, and a 4g / L rhamnose aqueous solution according to a volume ratio of 1:1:1. In the resulting mixed solution, magnetically stirred for 1 h, and dried at 75°C after the stirring was completed, to obtain the biochar-loaded surfactant;

[0033] S2, biochar loaded surfactant according to 300g / m 2 The amount of application was evenly applied to the surface layer of oil-contaminated soil (the moisture c...

Embodiment 2

[0039] A method for biochar-loaded surfactant coupling microbial phytoremediation of oil-contaminated soil, comprising the following steps:

[0040] S1, collect wheat straw and rape straw respectively, dry them at 78°C and crush them into 1-2cm segments with a pulverizer; then mix the above crushed straws and place them in a biochar furnace, and anoxic at 400°C Pyrolysis for 3 hours, cooling to room temperature after completion of pyrolysis to prepare biochar;

[0041] Put the obtained biochar into 5g / L sodium lauryl sulfate aqueous solution, 9g / L triton x-100 aqueous solution, and 5g / L rhamnose aqueous solution according to the volume ratio of 1:2:1. In the mixed solution, magnetically stirred for 1 hour, and then dried at 75°C after the stirring was completed, to obtain the biochar-loaded surfactant;

[0042] S2, biochar loaded surfactant according to 500g / m 2 The amount of application was evenly applied to the surface layer of petroleum-contaminated soil (the moisture con...

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PUM

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Abstract

The invention discloses a method for remediating petroleum-contaminated soil through coupling a charcoal-loaded surface active agent and a microorganism plant. The method comprises the following stepsof S1, applying the charcoal-loaded surface active agent into a petroleum-contaminated soil surface layer, and then standing and ageing for 80 days; S2, after ageing the soil, watering the soil on the surface layer, enabling the water content to reach to 50 to 60 percent, adjusting a pH value of the soil to be 7 to 8, and then adding a petroleum degradation microbial inoculum into the soil, and fermenting; S3, after fermenting the soil, planting a plant prepared according to different quantitative proportions in the soil, and removing the whole plant after the plant is ripe; and S4, cyclically repeating S1 to S3 until detecting that the content of a petroleum pollutant in the petroleum-contaminated soil is less than or equal to 4.5g / kg. The method for remediating the petroleum-contaminated soil through coupling the charcoal-loaded surface active agent and the microorganism plant provided by the invention adopts an in-situ remediation technology, does not damage environment during theremediation process, cannot bring secondary pollution, is green and environmental-friendly, and realizes a composite remediating mode with a good green cycle remediating 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 surfactants coupled with microbial 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-contaminated soil r...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10B09C1/08
CPCB09C1/08B09C1/10B09C1/105
Inventor 范志平涂志华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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