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Polycyclic aromatic hydrocarbon contaminated soil restoring technology

A technology of polluted soil and polycyclic aromatic hydrocarbons, applied in the restoration of polluted soil, etc., can solve the problems of polluted soil, soil compaction, etc., and achieve the effect of short treatment cycle, easy degradation and good ecology

Inactive Publication Date: 2017-02-22
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reaction period of this method is more than 40 days, and after the surfactant is added, the soil will be seriously polluted, and the degradation process will easily cause soil compaction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) Crush the straw and mix it with the biogas residue. The mixing ratio is 5:1, and at the same time, add KNO which accounts for 3% of the biogas residue. 3 , maintain the moisture content of the mixture at 200%, react for 3 days, and prepare biogas residue bacterial agent;

[0014] (2) PAH-contaminated soil was mixed evenly with alcohol, and the mass of alcohol added accounted for 60% of the contaminated soil. After soaking for 5 hours, biogas residue was added to the mixture. The amount of biogas residue added was 3 : 10, mixed evenly;

[0015] (3) Then place the mixture of biogas residue bacterial agent, polluted soil and alcohol in step (2) in a landfill with an anti-seepage layer at the bottom. After 10 days of stacking, the content of polycyclic aromatic hydrocarbons in the soil is reduced from 200ppm to 0.01ppm.

Embodiment 2

[0017] (1) Crush the straw and mix it with the biogas residue. The mixing ratio is 1:2 by mass of straw: biogas residue, and at the same time, add KNO which accounts for 5% of the mass of biogas residue. 3 , maintain the moisture content of the mixture at 60%, react for 20 days, and prepare biogas residue bacterial agent;

[0018] (2) The PAH-contaminated soil was evenly mixed with alcohol. The content of ethanol in the alcohol was 10%, and the mass of alcohol added accounted for 200% of the contaminated soil. After soaking and reacting for 1 hour, biogas residue bacteria were added to the mixture. The amount of biogas residue bacteria added was The quality of contaminated soil is 7:10, evenly mixed;

[0019] (3) Then place the mixture of biogas residue bacteria agent, polluted soil and alcohol in step (2) in a landfill with an anti-seepage layer at the bottom. After 4 days of stacking, the content of polycyclic aromatic hydrocarbons in the soil decreased from 500ppm to 0.01p...

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Abstract

The invention provides a novel polycyclic aromatic hydrocarbon contaminated soil treatment method which is characterized in that polycyclic aromatic hydrocarbon in soil is dissolved out by alcohol, pretreated biogas residue bacteria are added, microorganisms in biogas residues use the alcohol as a carbon source, and the polycyclic aromatic hydrocarbon in solution is more effectively decomposed and transformed. Bio-availability of the polycyclic aromatic hydrocarbon in the soil is improved by adding the alcohol.

Description

technical field [0001] The present invention provides a novel method for treating polycyclic aromatic hydrocarbons polluted soil. The idea is to firstly use alcohol to dissolve polycyclic aromatic hydrocarbons in the soil, and then microorganisms in biogas residues use alcohol as a carbon source to effectively decompose and transform polycyclic aromatic hydrocarbons in the solution , the method is a method for ecological restoration of polycyclic aromatic hydrocarbon soil, which belongs to the field of environmental protection. Background technique [0002] With the development of industry and agriculture and the expansion of urbanization, a large amount of soil has been polluted by polycyclic aromatic hydrocarbons. At present, the main treatment methods for polycyclic aromatic hydrocarbons are thermal analysis and advanced oxidation. Thermal analysis is costly and prone to air pollution. The advanced oxidation method adds a lot of chemicals, which is easy to pollute the so...

Claims

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Application Information

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IPC IPC(8): B09C1/02B09C1/10
CPCB09C1/02B09C1/105
Inventor 张大磊
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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