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Metal peroxide-based oxygen slow release composite material and preparation thereof

A metal peroxide and composite material technology, which is applied in the field of metal peroxide-based oxygen slow-release composite materials and its preparation to achieve the effects of improving compressive strength, slowing down reaction rate, and improving service life.

Inactive Publication Date: 2009-04-15
TIANJIN UNIV
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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 overcome the shortcomings of metal peroxide as a microbial oxygen source in the above-mentioned existing bioremediation process of polluted groundwater, and provide a novel, efficient and economically feasible metal peroxide-based oxygen slow-release composite material and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Mix calcium peroxide, calcium phosphate bone cement, anhydrous calcium sulfate and kaolin evenly, add water and send them to a granulator for granulation. The mass composition of the above components is as follows: calcium peroxide is 40%; calcium phosphate bone cement 50%; anhydrous calcium sulfate 1%; kaolin 5%; water 4%. Immerse the obtained solid particles in the acrylic acid-itaconic acid copolymer solution, wherein the mass ratio of homogeneous particles to acrylic acid-itaconic acid copolymer solution is 1:3, take it out after soaking for 3 minutes, dry and solidify at 22°C, and obtain Metal peroxide-based oxygen sustained-release composites.

Embodiment 2

[0019] Mix calcium peroxide, calcium phosphate bone cement, anhydrous calcium sulfate and kaolin evenly, add water and send them to a granulator for granulation. The mass composition of the above components is as follows: calcium peroxide is 60%; calcium phosphate bone cement 20%; anhydrous calcium sulfate 3%; kaolin 10%; water 7%. Immerse the obtained solid particles in the acrylic acid-itaconic acid copolymer solution, wherein the mass ratio of the solid particles to the acrylic acid-itaconic acid copolymer solution is 1:10, take it out after soaking for 1 minute, dry and solidify at 25°C, and obtain Metal peroxide-based oxygen sustained-release composites.

Embodiment 3

[0021] Mix calcium peroxide, calcium phosphate bone cement, anhydrous calcium sulfate and kaolin evenly, add water and send them to a granulator for granulation. The mass composition of the above components is as follows: calcium peroxide is 50%; calcium phosphate bone cement 35%; anhydrous calcium sulfate 2%; kaolin 8%; water 5%. Immerse the obtained solid particles in the acrylic acid-itaconic acid copolymer solution, wherein the mass ratio of the solid particles to the acrylic acid-itaconic acid copolymer solution is 1:6, take it out after soaking for 2 minutes, dry and solidify at 18°C, and obtain Metal peroxide-based oxygen sustained-release composites.

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PUM

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Abstract

The invention relates to the technical field of polluted groundwater bioremediation, in particular to a metal peroxide base oxygen slow-release composite material and a preparation method thereof. 40 percent to 60 percent of the metal peroxide, 20 percent to 50 percent of calcium phosphate cement, 1 percent to 3 percent of anhydrous calcium sulfate and 5 percent to 10 percent of clay are mixed evenly and added with water, then sent to a granulator for granulation; the obtained solid particles are soaked into the acrylic-itaconic acid copolymer liquid for 1 to 3 minutes and taken out, wherein,the mass ratio of the solid particles and the acrylic-itaconic acid copolymer liquid is 1:3-1:10, then drying and solidification are carried out at 18 to 25 DEG C, and then the metal peroxide base oxygen slow-release composite material is obtained. When in the polluted groundwater rehabilitation, the composite material can greatly slow the reaction rate of the metal peroxide and water, reduce unnecessary loss of the metal peroxide, and improve the service efficiency and period of the metal peroxide.

Description

technical field [0001] The invention relates to the technical field of bioremediation of polluted groundwater, in particular to a metal peroxide-based oxygen slow-release composite material and a preparation method. Background technique [0002] Among the three types of groundwater pollution, namely organic pollution, heavy metal pollution and radioactive pollution, organic pollution has surpassed heavy metal pollution and radioactive pollution and has become the main source of groundwater pollution. The use of microbial metabolism to degrade organic pollutants in groundwater has become a hotspot in the research of contaminated groundwater remediation technology due to its advantages of low cost, low environmental impact, strong decontamination ability, and can be used in combination with other technologies. Under natural conditions, due to the lack of dissolved oxygen in groundwater, the aerobic degradation efficiency of microorganisms on organic pollutants will be reduced....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/68
Inventor 刘涉江赵林谭欣刘秀丽毛国柱
Owner TIANJIN UNIV
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