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Remediation agent and remediation method for remediating aged petroleum contaminated soil

A technology for contaminated soil and remediation agents, applied in the field of underground contaminated soil remediation, can solve problems such as increased difficulty in remediation, less remediation, and complexity.

Inactive Publication Date: 2021-04-20
GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on the remediation of high molecular weight petroleum hydrocarbons or aged petroleum contaminated soils
At present, most of the polluted soils used in research are compounded by laboratories, but the actual polluted sites are often more complicated. The polluted soils are exposed to the environment for a long time and undergo a series of physical and chemical reactions, which makes the pollutant components in the soil more complicated and complex. It is more tightly combined with the soil, and the difficulty of repair is also greatly increased

Method used

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  • Remediation agent and remediation method for remediating aged petroleum contaminated soil
  • Remediation agent and remediation method for remediating aged petroleum contaminated soil
  • Remediation agent and remediation method for remediating aged petroleum contaminated soil

Examples

Experimental program
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Effect test

Embodiment 1

[0044] The polluted soil is the soil of an old oily wastewater polluted site in Shandong Province, and the pollutants are petroleum hydrocarbons and meta-xylene. According to the site survey results, lightly, moderately and heavily polluted soils were excavated and transported to the soil disposal workshop. The total petroleum hydrocarbons in lightly, moderately and severely polluted soils were determined by "Gas Chromatography for the Determination of Petroleum Hydrocarbons (C10-C40) in Soil and Sediments" (HJ 1021-2019) was tested, and the TPH concentrations were: 635mg / kg, 2062mg / kg, and 3891mg / kg. Meta & p-xylene was detected by "Determination of Volatile Organic Compounds in Soil and Sediment by Purge and Trap / Gas Chromatography-Mass Spectrometry" (HJ 605-2011), and the concentrations were 21.5mg / kg, 68.6mg / kg, and 138mg respectively / kg. For polluted soil, first use mechanical equipment to remove sundries and crush the soil to a diameter of 30 mm, then add 1%, 2%, and 3...

Embodiment 2

[0048] The polluted soil is the soil of a petrochemical polluted site in Gansu Province, and the pollutants are petroleum hydrocarbons and benzene series (benzene and ethylbenzene). The concentrations of TPH in lightly, moderately and heavily polluted soils are 4600mg / kg, 5830mg / kg and 7120mg / kg respectively, and the concentrations of benzene series are 20.6mg / kg, 55.1mg / kg and 75.2mg / kg respectively. In this example, in the light, medium and heavily polluted soils, the compound surfactant microemulsion additions are respectively 1%, 2%, 3%, and the rhamnolipid (concentration 0.1%) additions are respectively 0.5%, 1%, 2%, quicklime addition is respectively 5%, 10%, 15%, and sodium persulfate addition is respectively 1%, 2%, 3%, other parameters and operation are identical with example 1. The degradation of pollutants is shown in Table 2.

[0049] Table 2 Example 2 The removal rate of soil pollutants in different pollution degrees

[0050] degree of pollution ligh...

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Abstract

The invention discloses a remediation agent for remediating aged petroleum contaminated soil. The remediation agent is prepared from the following components: a compound surfactant microemulsion, rhamnolipid, persulfate and quick lime. A using method of the agent comprises the step of preparing the use amounts of the components according to the pollution degree of soil, wherein the use amounts of the components are respectively a light pollution use amount, a moderate pollution use amount and a severe pollution use amount. The remediation agent is green and environmentally-friendly, and all the components are common agents in environmental protection and restoration engineering and are easy to obtain; pollutants are finally decomposed into CO2, H2O and other non-toxic substances, so the removal rate of target pollutants is high, and secondary pollution to the environment is avoided; and a remediation method is easy and convenient to operate, short in repairing time, low in cost, high in safety and capable of achieving engineering application.

Description

technical field [0001] The invention relates to the technical field of underground polluted soil remediation, in particular to a remediation agent and a remediation method for remediating aged petroleum-contaminated soil. Background technique [0002] The development and utilization of oil and gas resources has brought more and more environmental problems. Pollutants such as oily solid waste, oily wastewater, and landed crude oil produced in the process of oil exploration, exploitation, transportation, and use have caused damage to the soil. severe pollution. Oil pollution not only affects land functions, such as changing soil properties and structures, destroying microbial communities, affecting plant growth, etc., but also brings toxic hazards to humans and animals. For example, polycyclic aromatic hydrocarbons can affect the normal function of liver, kidney and other organs Function, larger concentration of benzene series can cause nausea, dizziness and other symptoms. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/00B09C1/08
Inventor 周永信朱红祥牛婧顾静和利钊杨国航李琼赵振郑子健张海欧
Owner GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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