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Method for electrically remedying soil polluted by petroleum

A technology for oil pollution and electrical remediation, which is applied in the field of electrical remediation of oil-contaminated soil, can solve problems such as secondary pollution and damage to physical and chemical properties, and achieve the effect of avoiding secondary pollution and maintaining basic physical and chemical properties.

Inactive Publication Date: 2012-11-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of severe secondary pollution and damage to the original physical and chemical properties in the electrical restoration process of existing petroleum-contaminated soil. The present invention provides an electrical restoration method for petroleum-contaminated soil

Method used

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  • Method for electrically remedying soil polluted by petroleum

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specific Embodiment approach 1

[0012] Specific implementation mode 1: In this implementation mode, a method for electrical restoration of oil-contaminated soil is realized through the following steps:

[0013] Step 1. Prepare the desorption solution: the components of the desorption solution are β-cyclodextrin and CaCl 2 , respectively configure them into aqueous solutions, wherein the aqueous solution concentration of β-cyclodextrin is 1.5~2g / L, CaCl 2 The aqueous solution concentration is 0.005 ~ 0.009mol / L, the β-cyclodextrin aqueous solution and CaCl 2 The aqueous solution is mixed at a volume ratio of 1:1, and the pH value of the desorption solution is controlled at 7.0±0.1;

[0014] Step 2. Take the long-term petroleum-contaminated soil, mix each gram of petroleum-contaminated soil with 0.1-0.3ml of desorption solution, then put it into a rectangular parallelepiped reactor, and seal it tightly;

[0015] Step 3. Insert two plate-shaped electrodes into the two ends of the mixed soil, connect the two e...

specific Embodiment approach 2

[0020] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the aqueous solution concentration of β-cyclodextrin in step one is 1.674g / L, CaCl 2 The aqueous solution concentration is 0.007mol / L. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0021] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 2, every gram of oil-contaminated soil is mixed with 0.2ml of desorption solution. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention discloses a method for electrically remedying soil polluted by petroleum, relating to an electrically polluted soil restoring method and solves the problems that serious secondary pollution and damage on the originally physicochemical property can be caused during the process of electrically remedying the soil polluted by petroleum currently. In the invention, a method of combining electric remediation technology and chemical remediation technology is adopted and beta-cyclodextrin is taken as solubilizer for electric soil remediation. The pH value change of the remedied soil is small, therefore, the influence on the microorganism in the soil is smaller, and CO2 content released by breathing of the remedied soil is reduced compared with that of the remedied soil before remediation, thus well maintaining basic physicochemical property of the soil and truly realizing remediation.

Description

technical field [0001] The invention relates to an electrical restoration method for petroleum-contaminated soil. Background technique [0002] In recent years, oil, as the main energy source in the world today, has played an indispensable role in the development of the national economy. However, large-scale oil extraction, processing, and transportation are often accompanied by leakage and discharge accidents, causing environmental pollution such as air, water, and soil. . Among them, soil is an important part of the human ecological environment and the basis of the entire biosphere food chain, so soil pollution will cause extremely extensive impacts and endanger human health. At the same time, petroleum contains many poisonous and harmful "three harmful" substances similar to aromatic hydrocarbons, which can enter the food chain and accumulate in animals and humans to cause harm. Based on the seriousness of oil pollution hazards, many developed countries have successivel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08
Inventor 杨雪杜茂安万春黎万芳杨巧利
Owner HARBIN INST OF TECH
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