Novel method for restoring soil with serious petroleum pollution

A technology of oil pollution and new methods, which is applied in the restoration of polluted soil, soil conditioning materials, chemical instruments and methods, etc. Efficiency, good removal effect

Inactive Publication Date: 2010-03-31
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the target pollutants currently studied are mostly low-concentration polycyclic aromatic hydrocarbons such as phenanthrene and pyrene, and most of the existing studies use artificial poisoning methods to simulate actual polluted soil
However, the components of the pollutants in the actual crude oil-contaminated soil and the interactions between the components are complex, which makes the implementation conditions of SER technology very different from those in the contaminated soil. At present, there is still a lack of systematic research on high-concentration oil-contaminated soil.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: Accurately weigh 4.000 grams of contaminated soil, add it to a conical flask, add 80 ml of the solution of the above-mentioned desorbent, the solution concentration is 8 g / L, heat it in a water bath at 75 ° C, stir it magnetically for 1 hour, and 3000 rpm Centrifuge for 10 minutes, discard the liquid phase, and let the soil phase dry naturally. The total petroleum hydrocarbon removal rate was measured to be 76.9%.

Embodiment 2

[0014] Example 2: Accurately weigh 4.000 grams of contaminated soil, add it to a conical flask, then add 80 ml of the above-mentioned desorbent solution, the solution concentration is 6 g / L, heat it in a water bath at 75 ° C, stir it magnetically for 1 hour, and 3000 rpm , centrifuge for 10 minutes, discard the liquid phase, and air-dry the soil phase naturally. The total petroleum hydrocarbon removal rate was measured to be 61.3%.

Embodiment 3

[0015] Example 3: Accurately weigh 4.000 grams of contaminated soil, add it to a conical flask, then add 80 ml of the above-mentioned desorbent solution, the solution concentration is 8 g / L, heat it in a water bath at 75 ° C, and stir it magnetically for 40 minutes at 3000 rpm , centrifuge for 10 minutes, discard the liquid phase, and air-dry the soil phase naturally. The total petroleum hydrocarbon removal rate was measured to be 71.5%.

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PUM

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Abstract

The invention provides a novel method for restoring soil with serious petroleum pollution, which puts forward technological parameters comprising the adding quantity of a desorbing agent, the elutiontime, the temperature and the solid-liquid ratio which are required by the restoration of the polluted soil.

Description

technical field [0001] The invention relates to a new method for repairing heavily oil-polluted soil by using a desorbent whose main effective component is a surfactant. technical background [0002] With the increasing demand for petroleum and crude oil products in people's production and life, the problem of soil petroleum pollution is becoming increasingly serious. Soil oil pollution is a common type of soil pollution, which has the characteristics of high pollutant concentration, high toxicity, complex composition, strong binding ability with soil, and difficult desorption. Petroleum pollutants are highly hydrophobic, difficult to desorb from the soil, and release slowly in the soil matrix, which is a persistent source of pollution. In addition, this slow mass transfer rate restricts the degradation of pollutants by microorganisms, and also brings difficulties to the application of remediation technology. Therefore, in the remediation of oil-contaminated soil, it is ve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/02C09K17/00
Inventor 马小东卢媛孙红文
Owner NANKAI UNIV
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