Fat-soluble potassium ferrate slow releaser and preparation method thereof

A technology of potassium ferrate and slow-release agent, which is applied in the field of water treatment, can solve the problems of non-selective consumption of wastewater and instability of potassium ferrate, and achieve continuous and efficient in-situ chemical oxidation to repair organic pollution in groundwater, with short cycle time and high efficiency. Effects of selective oxidation and utilization efficiency

Active Publication Date: 2014-10-01
HUAQIAO UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved in the present invention is to provide a fat-soluble potassium ferrate slow-release agent, which can solve the problems of unstable potassium ferrate in air and water and non-selective consumption when treating waste water, and improve the efficiency of the potassium ferrate oxidizing agent. The utilization rate, and the stability and fat solubility are enhanced to achieve the purpose of continuous and efficient in-situ chemical oxidation repair of organic pollution in groundwater

Method used

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  • Fat-soluble potassium ferrate slow releaser and preparation method thereof
  • Fat-soluble potassium ferrate slow releaser and preparation method thereof

Examples

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Effect test

Embodiment 1

[0035] Weigh 1.5 g of polyethylene glycol with an average molecular weight of 300, add it to a solution containing 80 ml of absolute ethanol, transfer it into a 250 ml three-neck flask, heat and stir until completely dissolved. Add 9.0 g of section paraffin into the above solution, stir, and control the temperature at about 70-85°C. After the section paraffin is completely melted, add 7ml of span-80, stir and heat for about 5 minutes. Under the condition of stirring, add 3.0 g of potassium ferrate, continue to stir and cool naturally, and the stirring speed is controlled at 120 rpm. After cooling to room temperature (ie 25° C.), pour out the supernatant, take out the fat-soluble potassium ferrate slow-release agent particles at the bottom, dry them in the air, and weigh them.

[0036] The coating rate of the fat-soluble potassium ferrate sustained-release agent prepared in this example was 84.3%. In addition, it is characterized by testing that the fat-soluble potassium ferr...

Embodiment 2

[0038] Weigh 1.5g of polyethylene glycol, add it into a solution containing 80ml of absolute ethanol, transfer it into a 250ml three-neck flask, heat and stir until completely dissolved. Add 10.0 g of sliced ​​paraffin into the above solution, stir, and control the temperature at about 70-85°C. After the section paraffin is completely melted, add 5ml of span-80, stir and heat for about 5 minutes. Under the condition of stirring, add 2.0g of potassium ferrate, continue to stir and cool naturally, and the stirring speed is controlled at 120rpm. After cooling to room temperature (ie 25° C.), pour out the supernatant, take out the fat-soluble potassium ferrate slow-release agent particles at the bottom, dry them in the air, and weigh them.

[0039] The coating ratio of the fat-soluble potassium ferrate slow-release agent prepared in this example was 89.1%. In addition, it is characterized by testing that the fat-soluble potassium ferrate slow-release agent has a particle size of...

Embodiment 3

[0041]Weigh 1.5g of polyethylene glycol, add it into a solution containing 80ml of absolute ethanol, transfer it into a 250ml three-neck flask, heat and stir until completely dissolved. Add 10.0 g of sliced ​​paraffin into the above solution, stir, and control the temperature at about 70-85°C. After the section paraffin is completely melted, add 3ml of span-80, stir and heat for about 5 minutes. Under the condition of stirring, add 1.0 g of potassium ferrate, continue to stir and cool naturally, and the stirring speed is controlled at 120 rpm. After cooling to room temperature (ie 25° C.), pour out the supernatant, take out the fat-soluble potassium ferrate slow-release agent particles at the bottom, dry them in the air, and weigh them.

[0042] The coating ratio of the fat-soluble potassium ferrate slow-release agent prepared in this example was 82.6%. In addition, it is characterized by testing that the fat-soluble potassium ferrate slow-release agent has a particle size o...

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Abstract

The invention provides a fat-soluble potassium ferrate slow releaser and a preparation method thereof. The fat-soluble potassium ferrate slow releaser comprises an outer wall and an inner core, wherein the outer wall which is sliced paraffin wraps the inner core, and the inner core is potassium ferrate powder. The preparation method comprises the following steps: adding the sliced paraffin into an ethanol solution containing polyethylene glycol, and heating and stirring; after the sliced paraffin is fully dissolved, adding an emulsifier and continuously stirring; and finally, adding the potassium ferrate powder and stirring till cooling to room temperature, thus obtaining the fat-soluble potassium ferrate slow releaser with the outer wall being sliced paraffin and the inner core being potassium ferrate. The slow releaser provided by the invention can solve the problem that the oxidizing agent is not selectively consumed when chloridized organic pollutants in underground water are treated by potassium ferrate, can improve the utilization ratio of the potassium ferrate oxidizing agent and is simple in operating step of the process and short in period.

Description

technical field [0001] The invention relates to a fat-soluble potassium ferrate slow-release agent for in-situ oxidation repairing of chlorinated organic pollutants in groundwater and a preparation method thereof, belonging to the technical field of water treatment. Background technique [0002] With the development of industry and agriculture and the expansion of cities, groundwater is also being polluted to varying degrees. There are many types of groundwater pollutants and they are very harmful, among which chlorinated organic pollutants occupy the first place among all pollutants. As its typical pollutant, trichlorethylene (TCE) is an important chemical raw material, intermediate and organic solvent, so it is widely used. TCE has the characteristics of persistence in the environment and is extremely harmful to the human body and the environment. After its pollutants enter the groundwater vadose zone and aquifer, not only its residues can last for tens or even hundreds o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F103/06
Inventor 苑宝玲何强朱铭乔付明来林四发
Owner HUAQIAO UNIVERSITY
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