Polluted soil surfactant enhanced aeration test device and test method

A technology of surfactant and test device, which is applied in measurement devices, instruments, scientific instruments, etc., can solve the problem of inability to quantitatively analyze the pollutant removal effect of surfactants to enhance aeration mechanism, inability to achieve economic efficiency and environmental adaptability. Not strong etc.

Inactive Publication Date: 2021-04-20
HEFEI UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 1. In the process of implementation, the surfactant injection position cannot be changed according to the distribution of soil organic pollution in the field. The distance deviation between the surfactant injection position and the pollution source will reduce the effect of the surfactant. This defect determines the method not being able to achieve optimum economic efficiency;
[0006] 2. This method is an outdoor test, and the effect of surfactants on the airflow path, mobility control, and VOCs removal efficiency cannot be directly observed. This defect determines that this method cannot quantitatively analyze the pollutant removal effect and study surfactant enhancement. Aeration mechanism;
[0007] 3. This method is limited to low-permeability polluted sites, that is, the environmental adaptability is not strong

Method used

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  • Polluted soil surfactant enhanced aeration test device and test method
  • Polluted soil surfactant enhanced aeration test device and test method
  • Polluted soil surfactant enhanced aeration test device and test method

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Embodiment Construction

[0072] The following is attached Figure 1-Figure 2 Embodiments of the present invention are described in detail.

[0073] figure 1 It is a schematic diagram of the overall structure of the test device of the present invention, figure 2 It is a structural schematic diagram of the main device in the present invention, image 3 It is the schematic diagram of the adsorption chamber in the present invention. Depend on figure 1 , figure 2 and image 3 It can be seen that the device for the enhanced aeration test of surfactants in polluted soil of the present invention includes a main device and an injection device. The main device includes a test box 10 , a sample layer 11 , a coarse sand layer 12 , a partition 13 , an adsorption layer 14 , a diffuser 9 , a peristaltic pump 17 and two water tanks 16 .

[0074] The test box 10 is a rectangular hollow box without a cover in cross section. A through hole 8 is arranged at the center of the bottom plate of the test box 10, and ...

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Abstract

The invention provides a surfactant enhanced aeration test device and a test method, which belong to the technical field of environmental geotechnical engineering. The method can be used for conventional aeration, enhanced aeration by integrally injecting the surfactant and enhanced aeration by locally injecting the surfactant. A main device comprises a test box, a sample layer, a coarse sand layer, an adsorption layer, a partition plate, a peristaltic pump, a water tank and the like. In the test process, VOCs can be adsorbed by controlling the injection positions of different surfactants and activated carbon in the adsorption layer in the test box, and the repair efficiency of conventional aeration, overall surfactant injection enhanced aeration and local surfactant injection enhanced aeration is quantitatively evaluated. And the influence of the surfactant injection position on the airflow mode, the pollutant removal efficiency and the airflow path control is further studied. The test device and the test method have important engineering practical significance and theoretical research value for expansion and application of the technical range of the aeration method.

Description

technical field [0001] The invention relates to the technical field of environmental geotechnical engineering, in particular to a test device and a test method for intensified aeration of surfactants in polluted soil. Background technique [0002] In today's world, with the further advancement of industrialization, soil environmental problems are becoming more and more serious. Among many soil problems, volatile organic compounds (VOCs) such as petroleum hydrocarbon pollutants and organic chlorinated solvents are ubiquitous in petroleum and chemical polluted sites, and have become the main toxic pollution with high potential danger in urban polluted sites in my country. one of the things. Due to its advantages of low cost, high efficiency, in-situ operation, and environmental friendliness, aeration remediation technology has become an effective method for disposing of volatile organic pollutants in saturated soil and groundwater. However, due to the complexity and heterogen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
Inventor 查甫生李浩男周阳刘贵强许龙康博
Owner HEFEI UNIV OF TECH
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