Method for preparing rapid adsorption material with porous structure

A technology of adsorption material and porous structure, which is applied in the field of preparation of fast adsorption materials, can solve the problems of slow adsorption speed and lack of rigid molecular skeleton, and achieve fast adsorption speed, excellent adsorption capacity, and easy-to-achieve effects

Inactive Publication Date: 2016-12-14
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0007] However, the above-mentioned adsorption materials do not have a rigid molecular framework, and their adsorption speed is relatively slow.

Method used

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  • Method for preparing rapid adsorption material with porous structure
  • Method for preparing rapid adsorption material with porous structure
  • Method for preparing rapid adsorption material with porous structure

Examples

Experimental program
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Effect test

Embodiment 1

[0049] A method for preparing a fast-absorbing material with a porous structure, comprising the following steps:

[0050] (1) Preparation of oxidized cellulose

[0051] Mix sodium periodate and sodium chlorite and dissolve them in deionized water; add microcrystalline cellulose, adjust the pH value of the solution to 2 with dilute hydrochloric acid, and obtain a mixed solution; 3h; then add 10mL ethylene glycol to react for 30min to remove unreacted sodium periodate; finally, wash and dry to obtain oxidized cellulose;

[0052] The mass concentration of microcrystalline cellulose in the mixed solution is 10g L -1 , the mass concentration of sodium periodate is 20g L -1 , the mass concentration of sodium chlorite is 13.6g L -1 ;

[0053] (2) Preparation of adsorption material

[0054] Take 0.2g of oxidized cellulose prepared in step (1) and mix with 0.07g of tetrafluoroterephthalonitrile, 0.25g of potassium carbonate, and 0.034g of potassium hydroxide to obtain a mixture; a...

Embodiment 2

[0063] As described in Example 1, the difference is that the mass concentration of sodium periodate in the mixed solution of step (1) is 30g L -1 .

[0064] The adsorption material obtained in this example is at 10 mg·L -1 Cu 2+ The adsorption equilibrium time in the solution was 11min, and the removal rate was 93.7%; at 10mg L -1 Zn 2+ The adsorption equilibrium time in the solution was 14min, and the removal rate was 88.6%.

Embodiment 3

[0066] As described in Example 1, the difference is that the amount of tetrafluoroterephthalonitrile added in step (2) is 0.1 g.

[0067] The adsorption material obtained in this example is at 10 mg·L -1 Cu 2+ The adsorption equilibrium time in the solution was 10min, and the removal rate was 94.9%; at 10mg L -1 Zn 2+ The adsorption equilibrium time in the solution was 12min, and the removal rate was 89.8%.

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Abstract

The invention discloses a method for preparing a rapid adsorption material with a porous structure. The method comprises the steps of firstly, carrying out selective oxidation on microcrystalline cellulose by taking sodium periodate and sodium chlorite as oxidants so as to obtain oxycellulose particles with rigid structures, then, carrying out cross-linking on the oxycellulose particles by using tetrafluoroterephthalonitrile as a rigid cross-linker, forming a microstructure with a stable molecular skeleton, thereby obtaining the rapid adsorption material with the porous structure. The adsorption material prepared by the method contains a large number of adsorption groups such as carboxyl, hydroxyl and ether groups, has a rigid structure, is high in adsorption site density and has more pore structures and a relatively large specific surface area, so that the adsorption material has good adsorption capacity and rapid adsorption rate, is applicable to the treatment of heavy-metal ion polluted wastewater and has an application prospect in the field of environmental protection.

Description

technical field [0001] The invention relates to a preparation method of a fast adsorption material with a porous structure, belonging to the technical field of adsorption material synthesis. Background technique [0002] In recent years, with the development of science and technology, human production activities have produced a large amount of domestic sewage and industrial wastewater containing heavy metals, which are directly discharged without treatment or if the treatment is not up to standard, resulting in serious pollution of water bodies. Heavy metal pollutants in water are long-term and irreversible. Once formed, they cannot be degraded. Even trace amounts of heavy metal ions can be toxic and accumulate through the food chain, seriously affecting human health and causing environmental degradation. Among the currently known methods for treating metal ions in wastewater, the processing speed is relatively slow and most of them cannot treat wastewater with low concentra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F1/62
CPCB01J20/24C02F1/286B01J20/28054
Inventor 曹杰曹涵田晓玲钱鼎伟陈国栋姚程严宋涛王彦玲
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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