Permeable reactive barrier active material and preparation method thereof

A permeable reactive wall and active material technology, applied in the field of permeable reactive wall active materials and its preparation, can solve the problems of short service life, low adsorption capacity, high cost, etc., and achieve the goals of prolonging service life, enhancing reactivity, and preventing agglomeration Effect

Active Publication Date: 2020-06-05
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a permeable reaction wall active material, including modified iron-based materials, modified medical stone, the active material is used as the active medium material of the permeable reaction wall, with low cost, high adsorption capacity It has the advantages of high efficiency and long life, and solves the problems of high cost, easy clogging, low adsorption capacity and short service life of the existing permeable reactive wall active materials

Method used

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  • Permeable reactive barrier active material and preparation method thereof
  • Permeable reactive barrier active material and preparation method thereof
  • Permeable reactive barrier active material and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0038] The active material of the permeable reaction wall in this embodiment is a mixture of 1 part of modified iron powder, 1 part of modified ferric oxide, and 1 part of modified medical stone.

[0039] The preparation method comprises the following steps:

[0040] (1) Modification of iron powder:

[0041] 1) Mix 1.0g of 200 mesh iron powder and 10mL of dilute hydrochloric acid with a mass fraction of 0.1% for ultrasonic treatment, and then add 20mL of H 2 O, 80mL of ethanol, 1mL of ammonia, and 10mL of tetraethyl orthosilicate ethanol solution were mixed, stirred for 6h in a dispersing mixer, and then the suspension was magnetically separated, washed with deionized water and ethanol, and dried at 60°C in vacuum for 12h; The mass volume ratio of tetraethyl orthosilicate and ethanol in ethyl silicate ethanol solution is 0.3g:1mL;

[0042]2) Take 0.2g of the product obtained in step 1), add 100mL of xylene, and react with 0.1g (1g / mL) of 3-chloropropyltriethoxysilane in an a...

Embodiment 2

[0055] The active material of the permeable reaction wall in this embodiment is a mixture of 1 part of modified iron powder, 1 part of modified ferric oxide, and 2 parts of modified medical stone.

[0056] The preparation method is the same as in Example 1.

Embodiment 3

[0058] The active material of the permeable reaction wall in this embodiment is a mixture of 1 part of modified iron powder, 1 part of modified ferric oxide, and 4 parts of modified medical stone.

[0059] The preparation method is the same as in Example 1.

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Abstract

The invention relates to the field of heavy metal polluted groundwater remediation. The invention particularly discloses a permeable reactive barrier active material. The active material comprises a modified iron-based material and modified medical stone, is used as an active medium material of a permeable reactive barrier, has the advantages of low cost, high adsorption capacity, long service life and the like, and solves the problems of high cost, easy blockage, low adsorption capacity and short service life of existing permeable reactive barrier active materials. The invention also providesa preparation method of the permeable reactive barrier active material. By modifying the iron-based material and the medical stone, the problems that the iron-based material is easy to agglomerate and oxidize are solved, the adsorption performance of the active material is improved, and the removal effect on pollutants such as heavy metals Cr(VI) and Cd(II) in underground water is improved, so that the active material has a relatively great application prospect in remediation of the underground water polluted by heavy metals Cr(VI) and Cd(II).

Description

technical field [0001] The invention relates to the field of remediation of groundwater polluted by heavy metals, in particular to a permeable reactive wall active material and a preparation method thereof. Background technique [0002] With the continuous development of industrialization, the demand for heavy metals is gradually increasing. However, while heavy metals provide their advantages, if users dispose of them improperly, they will also pose a huge threat to human health. Among them, heavy metal pollution in groundwater has become the main geological environmental problem that people are facing at this stage, and our life depends on water, so it is inevitable to carry out research on the restoration of heavy metal pollution in groundwater. [0003] Permeable Reactive Wall Restoration Technology (PRB) plays an active role in the prevention and restoration of groundwater pollution, which can effectively control the diffusion of pollutants. PRB refers to the installa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/42C02F1/62C02F1/70C02F101/20C02F101/22C02F103/06
CPCC02F1/281C02F1/42C02F1/62C02F1/705C02F2101/20C02F2101/22C02F2103/06
Inventor 高镜清杨蕾任鹏沈喻颖陈勇陈志军南瑞琦张敬申高健磊
Owner ZHENGZHOU UNIV
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