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Kaolin composite adsorption material and its preparation method and application

A composite adsorption material, kaolin technology, applied in the field of water treatment agent and its preparation, can solve the problems of immature research and development of advanced oxidative degradation technology, poor applicability, need to be improved, etc., to improve adsorption capacity, improve adsorption efficiency, and large specific surface area. Effect

Active Publication Date: 2020-05-19
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the research and development of advanced oxidative degradation technology is immature, costly, and poor in applicability, and curing is an important prerequisite for complete degradation. Solid phase adsorption is still the most commonly used method for PPCPs pollution treatment.
However, among all kinds of clay minerals, kaolin still needs to be improved in the treatment of PPCPs wastewater.

Method used

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  • Kaolin composite adsorption material and its preparation method and application
  • Kaolin composite adsorption material and its preparation method and application

Examples

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Embodiment 1

[0023] This embodiment provides a kaolin composite adsorption material, which includes kaolin and chitosan which forms an intercalation structure with the kaolin, the chitosan is loaded with a core-shell structure photocatalyst, and the core-shell structure photocatalyst includes a particle size of 50-100 nm parts of tin dioxide nano-core and a porous carbon shell coated on the surface of the tin dioxide nano-core, the porous carbon shell includes a plurality of micropores with a pore diameter of 20-50 nm; the porosity of the porous carbon shell is 30%, the specific surface area of ​​the core-shell structure photocatalyst is 300m 2 / g; wherein, in the kaolin composite adsorption material, the chitosan content is 4% of the kaolin mass, and the tin dioxide nanoparticle content is 40% of the chitosan mass.

[0024] The present embodiment also provides a preparation method of the above-mentioned kaolin composite adsorption material, which includes the following steps:

[0025] St...

Embodiment 2

[0030] This embodiment provides a kaolin composite adsorption material. The structure of the composite adsorption material is basically the same as that of the composite adsorption material provided in Example 1. The difference is that the photocatalyst with a core-shell structure includes a Tin dioxide nano-core and the porous carbon shell coated on the surface of the tin dioxide nano-core; the porosity of the porous carbon shell is 40%, and the specific surface area of ​​the core-shell structure photocatalyst is 320m 2 / g; wherein, in the kaolin composite adsorption material, the chitosan content is 5% of the kaolin mass, and the tin dioxide nanoparticle content is 50% of the chitosan mass.

[0031] The preparation method of the above-mentioned kaolin composite adsorption material provided in this example is basically the same as the preparation method provided in Example 1, the main difference is that: in step 1 of this example, an aqueous ethanol solution with a volume conc...

Embodiment 3

[0033] This embodiment provides a kaolin composite adsorption material. The structure of the composite adsorption material is basically the same as that of the composite adsorption material provided in Example 1. The difference is that the core-shell structure photocatalyst comprises Tin dioxide nano-core and the porous carbon shell coated on the surface of the tin dioxide nano-core; the porosity of the porous carbon shell is 50%, and the specific surface area of ​​the core-shell structure photocatalyst is 350m 2 / g; wherein, in the kaolin composite adsorption material, the chitosan content is 6% of the kaolin mass, and the tin dioxide nanoparticle content is 70% of the chitosan mass.

[0034] The preparation method of the above-mentioned kaolin composite adsorption material provided in this example is basically the same as the preparation method provided in Example 1, the main difference is that: in step 1 of this example, an aqueous ethanol solution with a volume concentration...

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Abstract

The present invention provides a kaolin composite adsorption material, which comprises kaolin and chitosan, wherein the chitosan and the kaolin form an intercalation structure, the chitosan loads a core-shell structure photocatalyst, and the core-shell structure photocatalyst comprises a tin dioxide nanometer core and a porous carbon shell coated on the surface of the tin oxide nanometer core. Theinvention further provides the kaolin composite adsorption material prepared through the method, and applications thereof. According to the present invention, the kaolin composite adsorption materialcan be used for treating chloramphenicol, penicillin, erythromycin, streptomycin, vancomycin, pipemidic acid, ibuprofen, diclofenac sodium and other PPCPs contaminants in wastewater, and has good treatment effect. The technology of the present invention is funded by key scientific research projects of universities (15A610008) and PhD research initiation funds (201610009) of North China UniversityOf Water Resources And Electric Power.

Description

technical field [0001] The invention relates to a water treatment agent and a preparation method thereof, in particular to a kaolin composite adsorption material for adsorbing PPCPs pollutants and a preparation method thereof. Background technique [0002] PPCPs is the abbreviation of Drugs and Personal Protective Products, which are widely used in humans, livestock, and fish. There are more than 3,000 chemical components that make up PCCPs, mainly including two categories: one is drugs, including antibiotics, analgesics, hormones, diuretics, painkillers, steroids, caffeine, etc.; the other is personal protective products, Includes fragrances, hairspray, cosmetics, and more. At present, the different types of PPCPs left in the global environment are mainly antibiotics and pyrolytic analgesics. Because most of the PPCPs have low volatility or are not easy to degrade, most of them are left in the water environment and the detection amount is relatively low. Large, PPCPs have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/30C02F101/30C02F101/34C02F101/38
CPCB01J20/24C02F1/288C02F1/30C02F2101/30C02F2101/34C02F2101/38C02F2305/10
Inventor 孙垦
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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