Foam blocking material suitable for volatile organic compound polluted soil and application of foam blocking material

A technology for volatile organic compounds and polluted soil, which is applied in the field of polluted soil remediation and treatment, can solve problems such as insufficient isolation technology in inflatable greenhouses or steel structure greenhouses, and achieve the effects of reducing air pollution, cheap and easily available materials, and stable properties.

Inactive Publication Date: 2017-12-22
上海化工院环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a physical barrier effect of foam to effectively inhibit the volatilization of volatile organic compounds in the soil and reduce the secondary waste in the process of soil excavation, transportation and restoration construction. Polluted foam barrier material suitable for volatile organic compound polluted soil, to solve the technical problem of insufficient isolation technology of existing inflatable greenhouses or steel structure greenhouses

Method used

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  • Foam blocking material suitable for volatile organic compound polluted soil and application of foam blocking material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Prepare foam barrier materials, including 17.1% protein substances, 8.4% inorganic salt substances, 1.4% small molecular organic substances, 3.1% starch substances, 1.0% thickener, and 69.0% deionized water.

[0038] Wherein, the protein substance is hydrolyzed animal protein extracted from animal fur, and the average relative molecular weight of the hydrolyzed animal protein is 3000. Inorganic salts are formed by mixing zinc sulfate and ferrous sulfate at a mass ratio of 1:1. Small molecular organic matter is sodium lauryl sulfate. The starchy substance is composed of cornstarch, soluble starch and amylose in a mass ratio of 1:1:1. The thickener is xanthan gum.

[0039] The above-mentioned solid components are mixed evenly, and deionized water is slowly added to fully dissolve to prepare a foaming material.

[0040] Dilute the prepared foam barrier material with deionized water at a dilution ratio of 1:4; stir the diluted liquid at a high speed at a stirring speed o...

specific example

[0041] The action principle of the foam barrier material of the present embodiment is as follows: figure 1 As shown, that is, in actual use, the volatile organic compound-contaminated soil 2 to be treated is evenly covered with a foam barrier material to form a dense foam layer 1, which can effectively prevent organic matter and dust in the soil from entering the air and reduce air pollution. Specific examples are as follows:

[0042] Put 200g of contaminated soil with a chloroform content of 200.0mg / kg in a container, add 50g of the generated foam to the container at room temperature, evenly cover the contaminated soil with a foam thickness of 7.2cm, and place it in a fume hood.

[0043] After 1 hour, a small amount of chloroform enters the air, and the barrier rate is greater than 99%; after 3 hours, a small amount of chloroform enters the air, and the barrier rate is greater than 92%; after 6 hours, part of the chloroform enters the air, and the barrier rate is greater than...

Embodiment 2

[0045] This embodiment is applicable to the foam barrier material of soil polluted by volatile organic compounds. The material is prepared from raw materials including the following components and parts by weight: 10 parts of protein substances, 2 parts of inorganic salt substances, and 1 part of small molecular organic substances , 2 parts of starch, 1 part of thickener and 84 parts of deionized water.

[0046] Wherein, the protein substance is hydrolyzed animal protein extracted from hooves and feet of animals, and the average relative molecular weight of the hydrolyzed animal protein is 500. The inorganic salt is sodium sulfate. The small molecule organic matter is made by mixing sucrose and sodium dodecylbenzenesulfonate at a mass ratio of 3:1. The starchy substance is formed by mixing cornstarch and potato starch at a mass ratio of 2:1. The thickener is composed of gelatin, gum arabic and xanthan gum in a mass ratio of 1:2:1.

[0047] The present embodiment foam barrie...

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Abstract

The invention relates to a foam blocking material suitable for volatile organic compound polluted soil and application of the foam blocking material. The material is prepared from the following components of, by weight, 10-20 parts of protein substances, 2-10 parts of inorganic salt substances, 1-5 parts of low-molecular-weight organics, 2-10 parts of starch substances, 1-2 parts of thickening agents and 53-84 parts of deionized water, wherein the weight sum of the components is 100 parts. During application, the foam blocking material is diluted by the deionized water to prepare mixed liquid; the mixed liquid is stirred at a high speed to form even and fine foam; and the formed even and fine foam evenly covers the polluted soil to be treated, and a foam layer is formed on the surface layer of the polluted soil to be treated. Compared with the prior art, the material is stable in property, nontoxic, harmless, degradable and wide in application range, does not cause pollution to the environment, saves energy, is environmentally friendly and can be widely used for inhibiting dust, covering a liquid beach, blocking peculiar smell and isolating air.

Description

technical field [0001] The invention belongs to the technical field of remediation and treatment of polluted soil, and relates to a foam barrier material suitable for soil polluted by volatile organic compounds and an application thereof. Background technique [0002] With the acceleration of urbanization and industrial transfer, the number of polluted sites that have been relocated or left behind by urban industrial enterprises in my country is increasing day by day. According to preliminary estimates, there are at least hundreds of thousands of industrial pollution sites in my country. Urban polluted sites have become a limiting factor for the safe reuse of land resources in many large and medium-sized cities in my country. The research and practice of site contaminated soil remediation has become an important content in the field of environmental governance in my country. [0003] It is estimated that potential volatile organic compounds (VOCs) and semi-volatile organic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
CPCB09C1/00
Inventor 王亭凯商照聪倪晓芳张长波薛晓康
Owner 上海化工院环境工程有限公司
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