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Preparation method and application of adsorbent of organic and inorganic composite material

A technology of inorganic composite materials and adsorbents, applied in the field of organic-inorganic composite adsorbents, the preparation of organic-inorganic composite adsorbents, and organic pollutants, can solve the problem of organic pollutants in water without organic-inorganic composite materials and other issues, to achieve the effect of high utilization rate, efficient utilization and low cost

Inactive Publication Date: 2012-06-20
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there have been reports on the use of cationic surfactants to modify zeolite to remove organic pollutants in water and the use of chitosan to remove organic pollutants in water, there has been no report on the use of chitosan, zeolite and cationic surfactants as materials. There are no reports on the preparation of organic-inorganic composite materials from raw materials, and there is no research report on the adsorption and removal of organic pollutants in water by this organic-inorganic composite material.

Method used

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  • Preparation method and application of adsorbent of organic and inorganic composite material
  • Preparation method and application of adsorbent of organic and inorganic composite material
  • Preparation method and application of adsorbent of organic and inorganic composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0020] (1) Get natural zeolite, after adopting distilled water to clean several times, blast air-drying, crushing, grinding, cross 200 mesh sieves for subsequent use; Be that the chitosan solution of 2% with concentration is the chitosan solution preparation concentration of 2% with concentration; Preparation concentration For 25mmol / L cetylpyridinium bromide (CPB) stock solution for later use.

[0021] (2) Take 20g of spare natural zeolite, place it in a distilled water reactor containing 200mL, stir to make the natural zeolite in suspension; weigh 200mL of chitosan solution and fully mix it with the suspended natural zeolite, drop it into the reaction solution Add a sodium hydroxide solution with a concentration of 2.0mol / L until the reaction liquid appears obvious flocs and continue to stir for 15 minutes; then centrifuge and wash the solid repeatedly with distilled water until the pH of the supernatant is close to 7.0, and place the solid in After drying at 105°C, grind an...

Embodiment 2

[0026] (1) Get the natural zeolite, first adopt 1mol / L sodium chloride solution to clean (the liquid-solid ratio of the sodium chloride solution and the natural zeolite is 10mL / g), then use distilled water to clean several times, air-dried, broken, Grinding and passing through a 200-mesh sieve for future use; preparing a 2% chitosan solution with a concentration of 2% acetic acid solution for future use; preparing a cetylpyridinium bromide (CPB) stock solution with a concentration of 25 mmol / L for future use.

[0027] (2) Get 20g of standby zeolite, place it in a distilled water reactor filled with 200mL, stir to make the zeolite in suspension; weigh 100mL of chitosan solution and fully mix the suspended zeolite, add dropwise the concentration of zeolite in the reaction solution. 2.0mol / L sodium hydroxide solution, continue to stir for 15 minutes until the reaction solution appears flocculent; then centrifuge, wash the solid with distilled water repeatedly until the pH of the s...

Embodiment 3

[0032] (1) Get natural zeolite, after adopting distilled water to clean several times, blast air-drying, crushing, grinding, cross 200 mesh sieves for subsequent use; Be that the chitosan solution of 2% with concentration is the chitosan solution preparation concentration of 2% with concentration; Preparation concentration It is used as 25mmol / L hexadecyltrimethylammonium bromide (HTAB) stock solution for future use.

[0033] (2) Take 5g of spare zeolite, place it in a 50mL distilled water reactor, stir to make the natural zeolite in suspension; weigh 50mL of chitosan solution and fully mix the suspended natural zeolite, add dropwise to the reaction solution Sodium hydroxide solution with a concentration of 2.0mol / L, and continue stirring for 15 minutes until the reaction liquid has obvious flocculents; then centrifuged, and the solid is washed repeatedly with distilled water until the pH of the supernatant is close to 7.0, and the solid is placed in 105 After drying at ℃, gri...

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Abstract

The invention discloses a preparation method and application of an adsorbent of an organic and inorganic composite material. The preparation method for the adsorbent of the organic and inorganic composite material comprises the following specific steps of: putting zeolite into a reactor containing distilled water and stirring until the zeolite is in a suspension state; fully mixing a chitosan solution with the zeolite in the suspension state; dropping a sodium hydroxide solution into the reaction liquid, centrifugally separating, and washing solid until the pH value of the supernatant is close to 7.0; drying the solid; mixing the solid with a cationic surface active agent; and putting the reaction system into a constant-temperature water bath vibrator for reaction, to obtain the cationic surface active agent modified chitosan loaded zeolite adsorbent. The adsorbent prepared with the preparation method disclosed by the invention is applicable to removing organic pollutants such as humic acid, congo red and the like from water so that cheap natural resources can be efficiently utilized, the prepared product is suitable for removing soluble organic pollutants from drinking water and removing anionic dye from printing and dyeing waste water, and the adsorbent of the organic and inorganic composite material has the advantages of high utilization rate, low cost and the like.

Description

technical field [0001] The invention relates to a method for preparing an organic-inorganic composite adsorbent, specifically, using chitosan, zeolite and cationic surfactants as raw materials to prepare an organic-inorganic composite adsorbent, and the composite adsorbent is used in removing water The application on organic pollutants such as humic acid and Congo red belongs to the technical field of water purification and organic pollutant treatment. Background technique [0002] With the rapid development of social economy, a large number of pollutants appear in water bodies, such as natural organic substances such as humic acid and artificial synthetic organic substances such as dyes. It seriously threatens the survival safety of aquatic organisms and the safety of human drinking water. In order to improve the quality of human drinking water and protect the environment, effective methods must be adopted to reduce the concentration of natural organic substances such as h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
Inventor 林建伟詹艳慧孙艳丽
Owner SHANGHAI OCEAN UNIV
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