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Permeable reaction medium for remediation of nitrobenzene-polluted underground water

A technology of reaction medium and groundwater, applied in the field of pollution control, can solve problems such as easy generation of aniline and secondary pollution, and achieve the effects of low cost, convenient installation and construction, and no damage to the ecological environment.

Inactive Publication Date: 2012-04-18
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of simply using zero-valent iron to remove nitrobenzene is easy to generate aniline, causing the problem of secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] It is used to repair the osmotic reaction wall of groundwater polluted by nitrobenzene. The thickness of the wall is about 30~100cm. The medium is made of 25 mass% zero-valent iron powder and 65 mass% straw powder. Together, granules with a particle size of 5 mm were obtained through granulator preparation.

Embodiment 2

[0020] It is used to repair the osmotic reaction wall of nitrobenzene-contaminated groundwater. The thickness of the wall is about 30~100cm. The medium is made of 34 mass% zero-valent iron powder and 56 mass% straw powder. Together, granules with a particle size of 6 mm were obtained through granulator preparation.

Embodiment 3

[0022] The osmotic reaction wall used to repair nitrobenzene-contaminated groundwater, the thickness of the wall is about 30~100cm, the medium is 30% by mass of zero-valent iron powder, 60% by mass of straw powder, and the two are mixed together by 10% by mass of cement , prepared by a granulator to obtain particles with a particle size of 3 mm.

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PUM

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Abstract

The invention relates to a permeable reaction medium for the remediation of nitrobenzene-polluted underground water. The permeable reaction medium is granular and is formed through the cementation of zero-valent iron and straw powder by using a cementing agent; the content of the zero-valent iron and the content of the straw powder are respectively 25-35 mass% and 55-65 mass%; and the content of the cementing agent is 6-11 mass%. According to the permeable reaction medium for the remediation of the nitrobenzene-polluted underground water, the zero-valent iron and the straw powder are selectedas raw materials of a filling medium of a permeable reactive barrier, the zero-valent iron and the straw powder are cemented into a granular shape, and chemical reaction and physical adsorption can be reasonably combined, so that the permeable reaction medium has an excellent treatment effect for nitrobenzene, a short remediation cycle and no secondary pollution; the zero-valent iron and the straw powder are low in price and easy to get; on the premise of reasonable cost, the excellent treatment effect for the nitrobenzene is achieved, and thus, the permeable reaction medium has broad prospects.

Description

[0001] technical field [0002] The invention belongs to the technical field of treating polluted environment, and in particular relates to a osmotic reaction medium for repairing groundwater polluted by nitrobenzene. It has the characteristics of cheap and easy-to-obtain materials, and can efficiently repair nitrobenzene-contaminated groundwater, which is of great significance for solving the problem of nitrobenzene pollution in water bodies and ensuring the safety of groundwater. Background technique [0003] Groundwater pollution is a very serious environmental problem at present, which is characterized by complexity, concealment and difficulty of recovery. Among the three types of groundwater pollution, organic pollution has surpassed heavy metal pollution and radioactive pollution, and has become the main form of groundwater pollution. Nitrobenzene pollution is one of the organic pollution. Once an aquifer has been contaminated, recovery and purification is a lengthy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/70C02F101/38C02F103/06
Inventor 孙树林柏仇勇刘涛尚文涛吴荣东
Owner HOHAI UNIV
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