Method for remediating petroleum-contaminated soil through coupling charcoal-loaded surface active agent and microorganism plant
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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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[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 pollu
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[0029] Example 1
[0030] A method for biochar-loaded surfactant coupled with microbial phytoremediation of petroleum-contaminated soil includes the following steps:
[0031] S1. Collect rice straw and corn stalks separately, dry them at 80°C and pulverize them into 1-2cm segments with a pulverizer; then mix the pulverized straws and place them in a biochar stove at 450°C. Oxygen pyrolysis for 3h, after the pyrolysis is completed, cool to room temperature to prepare biochar;
[0032] Soak the resulting biochar into a mixture of 4g / L sodium lauryl sulfate aqueous solution, 8g / L Triton x-100 aqueous solution, and 4g / L rhamnose aqueous solution in a volume ratio of 1:1:1. In the resulting mixture, magnetically stirred for 1 hour, and dried at 75°C after the stirring, to obtain the biochar-loaded surfactant;
[0033] S2, load biochar with surfactant at 300g / m 2 The application amount of the oil is evenly applied to the surface of the petroleum-contaminated soil (the surface soil moisture...
Example Embodiment
[0038] Example 2
[0039] A method for biochar-loaded surfactant coupled with microbial phytoremediation of petroleum-contaminated soil includes the following steps:
[0040] S1: Collect wheat stalks and rape stalks, dry them at 78°C and pulverize them into 1-2cm segments with a pulverizer; then mix the pulverized straws and place them in a biochar stove at 400°C under anoxic conditions Pyrolysis for 3h, cool to room temperature after the pyrolysis is completed, to prepare biochar;
[0041] Put the obtained biochar into a mixture of 5g / L sodium lauryl sulfate aqueous solution, 9g / L Triton x-100 aqueous solution, and 5g / L rhamnose aqueous solution in a volume ratio of 1:2:1 In the mixed liquid, magnetically stirred for 1 hour, and dried at 75 ℃ after the end of the stirring to obtain the biochar-loaded surfactant;
[0042] S2, load biochar with surfactant at 500g / m 2 The application amount of the oil is evenly applied to the surface of the petroleum contaminated soil (the surface soil...
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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...
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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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