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Organic-polluted soil restoration method

A technology of polluted soil and remediation method, applied in the field of rapid and efficient remediation of organic-contaminated soil, can solve problems such as poor remediation effect of chemical oxidation technology, and achieve the effects of mature remediation sub-technology, promotion of decomposition and volatilization, and easy management.

Inactive Publication Date: 2015-07-08
NANJING SREMOL ENVIRONMENTAL TECH
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  • Abstract
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Problems solved by technology

However, for the contaminated soil containing 5-ring and more than 5-ring PAHs, the chemical oxidation technology has poor remediation effect.

Method used

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  • Organic-polluted soil restoration method
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  • Organic-polluted soil restoration method

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Embodiment Construction

[0019] The invention relates to disposing of polluted soil in a site in an in-situ and off-site manner, and the polluted soil can be excavated, transported and repaired after the construction waste in the polluted area is cleaned up. Specific steps are as follows:

[0020] Divide the excavated contaminated soil into two categories, one is the contaminated soil containing non-aqueous phase liquid (Non-aqueous phase liquid), the other is the contaminated soil without non-aqueous phase liquid; Contaminated soil is crushed and screened on the crushing and screening integrated equipment, and the surfactant (Surfactant, such as: sodium dodecylbenzenesulfonate, Tween 80) is washed and pretreated. After the treatment, the surfactant waste liquid Flow through the sump, and finally discharge through water treatment facilities after reaching the standard; Contaminated soil without non-aqueous liquid is directly crushed and screened on the integrated crushing and screening equipment; All ...

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Abstract

The invention relates to an organic-polluted soil restoration method. Excavated polluted soil is divided into two types of soil, the first type of the soil contains non-aqueous phase liquid and the second type of the soil does not contain non-aqueous phase liquid. The method comprises the following steps of carrying out crushing and screening on the polluted soil containing non-aqueous phase liquid by a crushing-screening combined device, simultaneously, carrying out flushing pre-treatment by a surfactant, uniformly spreading and stacking all the polluted soil subjected to crushing and screening in an enclosed greenhouse, heating the polluted soil to a temperature of 80-100 DEG C by a geothermal system at the lower part of the polluted soil, keeping the temperature of the heated polluted soil in a range of 80-100 DEG C for 2-4h, then spraying a first oxidizing agent to the polluted soil by a spraying system in the enclosed greenhouse, then carrying out heating treatment on the polluted soil to a temperature of 60-80 DEG C and keeping the temperature for 6-10h.

Description

technical field [0001] The invention relates to a method for remediating organic-contaminated soil, in particular to a fast and efficient method for remediating organic-contaminated soil. Background technique [0002] At present, for soils containing volatile organic pollutants (VOCs) and total petroleum hydrocarbons (TPH), remediation technologies at home and abroad have been relatively mature (such as chemical oxidation, gas phase extraction, biocomposting, normal temperature analysis, etc.), and their remediation effects It can also be guaranteed; for soils containing polycyclic aromatic hydrocarbons (PAHs) pollutants, there are mainly four remediation technologies: microbial degradation, photodegradation, high-temperature heat treatment, and chemical oxidation. Studies have found that PAHs with more than 4 rings are difficult to be degraded by microorganisms due to their poor water solubility. In addition, microbial degradation requires a long disposal time, high temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/06B09C1/08
Inventor 武大博陈政赵国华白海静郭峰葛舒荃
Owner NANJING SREMOL ENVIRONMENTAL TECH
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