Petroleum hydrocarbon contaminated soil remediation method based on sodium percarbonate

A technology of contaminated soil and sodium percarbonate, which is applied in the field of soil remediation, can solve the problems of oil-contaminated soil remediation, secondary pollution, and high processing costs.

Active Publication Date: 2020-06-30
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with physical and biological remediation technologies, chemical oxidation remediation technology has many advantages such as fast repair speed, low requirements on soil application conditions, wide application range of pollutant types and pollution degrees, and can treat oil-contaminated soil with h

Method used

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  • Petroleum hydrocarbon contaminated soil remediation method based on sodium percarbonate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for remediating petroleum hydrocarbon contaminated soil based on sodium percarbonate is characterized in that it mainly comprises the following steps:

[0029] 1) Pretreatment

[0030] 1.1) Use a crusher to crush and sieve the polluted soil (the initial concentration of petroleum hydrocarbons is 38315 mg / kg) to obtain polluted soil with a particle size of less than 10 cm;

[0031] 1.2) weigh the polluted soil after the crushing and sieving obtained in step 1.1), and obtain the polluted soil weight as 200g; mix the polluted soil after weighing with 39.2g sodium percarbonate to make pretreated soil;

[0032] 2) Solubilization and activation treatment

[0033] 2.1) Dissolve 1mL Tween 80 in 0.2L water, stir well to make a solubilizer solution;

[0034] 2.2) Add 0.44g catechol and 1.11g ferrous sulfate to the 0.2L solubilizing agent solution prepared in step 2.1), and stir evenly to obtain a solubilizing activator solution;

[0035] 3) Soil chemical oxidation tre...

Embodiment 2

[0038] A method for remediating petroleum hydrocarbon contaminated soil based on sodium percarbonate is characterized in that it mainly comprises the following steps:

[0039] 1) Pretreatment

[0040] 1.1) Use a crusher to crush and sieve the polluted soil (the initial concentration of petroleum hydrocarbons is 47955 mg / kg) to obtain polluted soil with a particle size of less than 10 cm;

[0041] 1.2) the polluted soil after the crushing and sieving obtained in step 1.1) is weighed, and the polluted soil weight obtained is 100g; the polluted soil after weighing is mixed with 31.4g sodium percarbonate to make pretreated soil;

[0042] 2) Solubilization and activation treatment

[0043] 2.1) Dissolve 1mL Tween 80 in 0.05L water, stir well to make a solubilizer solution;

[0044] 2.2) Add 0.275g catechol and 0.695g ferrous sulfate to the 0.05L solubilizing agent solution configured in step 2.1), and stir evenly to obtain a solubilizing activator solution;

[0045] 3) Soil chem...

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Abstract

The invention provides a petroleum hydrocarbon contaminated soil remediation method based on sodium percarbonate. The principle is as follows: a catechol ferrous complex is added into pretreated soil; the complexed ferrous ions can catalyze hydrogen peroxide released by sodium percarbonate to form Fenton reaction so as to remove petroleum hydrocarbon; H< + > generated in an aqueous solution and in the petroleum hydrocarbon degradation process can react with CO<3><2-> to generate CO2 and neutralize with OH <-> generated in the Fenton reaction to generate water, only catechol salt and Tween 80are reserved in the soil, Tween 80 is easy to biodegrade, and green and environment-friendly remediation of the contaminated soil is achieved.

Description

technical field [0001] The invention relates to the field of soil remediation, in particular to a sodium percarbonate-based petroleum hydrocarbon-contaminated soil remediation method. Background technique [0002] Soil is an important part of the ecological environment and one of the main resources for human survival. For a country with a large population like my country, land resources are particularly important. Petroleum has become one of the most important energy sources for human beings. With the increase in demand for petroleum products, a large amount of petroleum and its processed products enter the soil, causing harm to organisms and humans, and the oil pollution of the soil is becoming more and more serious. This has become a worldwide phenomenon. environmental problems. [0003] In the process of oil production, storage, transportation, refining, processing and use, due to accidents, abnormal operation and maintenance, etc., there will be spillage and discharge o...

Claims

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Application Information

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IPC IPC(8): B09C1/08
CPCB09C1/08
Inventor 刘元元张桐曾其玲何丹冯星凯
Owner CHONGQING UNIV
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