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Sustained-release potassium permanganate oxidant for in-situ chemical remediation of groundwater

A technology of potassium permanganate and chemical restoration, which is applied in the fields of manganate/permanganate, oxidized water/sewage treatment, etc., which can solve the problems of expensive carrier and unfavorable engineering application, and achieve low price and convenient recycling Effect

Inactive Publication Date: 2012-06-13
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, it can be seen that the slow-release KMnO 4 The preparation and application are still in the initial stage, and the carrier used in the existing technology is expensive, which is not conducive to engineering application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] a. Use a high-speed universal pulverizer to grind KMnO 4 The particles are crushed to a particle size of 10 μm;

[0030] b. Put the container containing sliced ​​paraffin into a water bath at 70°C, and wait for the paraffin to melt;

[0031] c. The crushed KMnO 4 1 g of particles was added to 20 g of molten paraffin, and the mixture was ultrasonically treated for 10 minutes, during which time the container containing the paraffin was kept in a water bath at 70°C;

[0032] d. Pour the molten mixture into a mold. The inner shape of the mold is a cylinder with a diameter of 11mm and a height of 4.8mm. After the molten mixture is cooled and solidified, it is taken out from the mold to obtain slow-release KMnO 4 oxidizing agent.

Embodiment 2

[0034] a. Use a high-speed universal pulverizer to grind KMnO 4 The particles are crushed to a particle size of 10 μm;

[0035] b. Put the container containing sliced ​​paraffin into a water bath at 70°C, and wait for the paraffin to melt;

[0036] c. The crushed KMnO 4 1 g of particles was added to 35 g of molten paraffin, and the mixture was ultrasonically treated for 10 minutes, during which time the container containing the paraffin was kept in a water bath at 70°C;

[0037] d. Pour the molten mixture into a mold. The inner shape of the mold is a cylinder with a diameter of 11mm and a height of 4.8mm. After the molten mixture is cooled and solidified, it is taken out from the mold to obtain slow-release KMnO 4 oxidizing agent.

Embodiment 3

[0039] a. Use a high-speed universal pulverizer to grind KMnO 4 The particles are crushed to a particle size of 10 μm;

[0040] b. Put the beaker containing sliced ​​paraffin into a water bath at 70°C, and wait for the paraffin to melt;

[0041] c. The crushed KMnO 41 g of particles was added to 80 g of molten paraffin, and the mixture was ultrasonically treated for 10 minutes, during which time the beaker containing the paraffin was kept in a water bath at 70°C;

[0042] d. Pour the molten mixture into a mold. The inner shape of the mold is a cylinder with a diameter of 11mm and a height of 4.8mm. After the molten mixture is cooled and solidified, it is taken out from the mold to obtain slow-release KMnO 4 oxidizing agent.

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Abstract

The invention relates to a sustained-release potassium permanganate oxidant for in-situ chemical remediation of groundwater. The sustained release of the sustained-release KMnO4 oxidant is achieved by dispersing KMnO4 into molten paraffin wax, and then cooling and solidifying in a die to prepare the sustained-release KMnO4 oxidant in different shapes. KMnO4 particles are uniformly wrapped in the paraffin wax, and when the sustained-release KMnO4 oxidant is in contact with the groundwater, the KMnO4 in the paraffin wax can be released to the groundwater at a certain rate, then organic pollutants in the groundwater are oxidized, and the residual paraffin wax is taken out of the groundwater after the release is completed. According to the invention, the paraffin wax is selected as a carrier of the KMnO4, and the KMnO4 is easy to disperse in the paraffin wax, so that the price is low and the sustained-release KMnO4 oxidant is convenient to recover. The sustained-release KMnO4 oxidant can be used for not only achieving the in-situ chemical remediation purpose of the polluted groundwater, but also avoiding the loss due to excessive one-time dosing of the KMnO4 or poor effects due to insufficient dosing and influence of a byproduct, namely MnO2 on an underground environment.

Description

Technical field: [0001] The invention relates to an in-situ treatment of polluted groundwater, in particular to a slow-release oxidant for in-situ oxidative degradation of organic pollutants and a preparation method thereof. Background technique: [0002] In recent years, with the development of modern industrial society, the pollutants entering the soil are also increasing. Moreover, soil and groundwater interact and influence each other. Once the soil is polluted, it will directly affect the crops, and the pollutants will also cause secondary pollution to the surface water and groundwater, and enter the human body through the drinking water or soil plant system, through the food chain, directly endangering human health, and affecting society, economic development and ecology. The environment has an immeasurable impact. Therefore, the pollution of groundwater has received more and more attention. [0003] Contaminated soil and groundwater remediation can usually be carri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/12C02F1/72
Inventor 董双石周丹丹王金王艳龙张建宾
Owner JILIN UNIV
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