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Magnetic porous adsorbent and preparation method thereof

A porous adsorbent and magnetic technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of high cost of adsorbent, complicated preparation process, inconvenient separation, etc., and achieve simple process, Wide environmental applicability and simplified time-consuming effects

Active Publication Date: 2019-03-29
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these adsorbents still have disadvantages such as high cost, complicated preparation process, inconvenient separation during application, and some even cause secondary pollution.

Method used

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  • Magnetic porous adsorbent and preparation method thereof
  • Magnetic porous adsorbent and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0023] (1) Disperse 1.0 g of melamine resin, 5.0 g of cetyltrimethylammonium bromide, and 1.0 g of ferric oxide in deionized water, add 0.1 mL of formic acid, mix well, and react at 40°C for 10 min to prepare Obtain a mixed solution containing magnetic complexes;

[0024] (2) Add 60.0 mL of 1 wt% hydrochloric acid solution containing 0.5 g chitosan to the mixed solution containing the magnetic complex obtained in step (1), and mix well;

[0025] (3) Add 2.0 mL of ammonia water and 2.0 mL of formaldehyde to the mixture obtained in step (2), and stop the reaction after cross-linking reaction at 40°C for 0.5 h to form a cross-linked porous composite;

[0026] (4) Adjust the pH of the solution obtained in step (3) to neutral, separate the product with a magnetic field, wash it repeatedly with deionized water and dry it, and then reflux with absolute ethanol to remove excess cetyl trimethyl bromide ammonium to obtain a magnetic porous adsorbent.

[0027] 40 mg of adsorbent was ad...

Embodiment 2

[0029] (1) Disperse 3.0 g of melamine resin, 25.0 g of hexadecyltrimethylammonium bromide and 2.5 g of ferric oxide in deionized water, add 0.8 mL of formic acid, mix well, and react at 60°C for 40 min to prepare Obtain a mixed solution containing magnetic complexes;

[0030] (2) Add 60.0 mL of 1 wt% hydrochloric acid solution containing 3.0 g chitosan to the mixed solution containing the magnetic complex obtained in step (1), and mix well;

[0031] (3) Add 10.0 mL of ammonia water and 1.0 mL of epichlorohydrin to the mixture obtained in step (2), and stop the reaction after cross-linking reaction at 60°C for 1.0 h to form a cross-linked porous composite;

[0032] (4) Adjust the pH of the solution obtained in step (3) to neutral, separate the product with a magnetic field, wash it repeatedly with deionized water and dry it, and then reflux with absolute ethanol to remove excess cetyl trimethyl bromide ammonium to obtain a magnetic porous adsorbent.

[0033] 40 mg of adsorben...

Embodiment 3

[0035] (1) Disperse 1.0 g of melamine resin, 40.0 g of cetyltrimethylammonium bromide and 4.0 g of ferric oxide in deionized water, add 1.5 mL of formic acid, mix well, and react at 70°C for 90 min to prepare Obtain a mixed solution containing magnetic complexes;

[0036] (2) Add 60.0 mL of 1 wt% hydrochloric acid solution containing 5.0 g of chitosan to the mixed solution containing the magnetic complex obtained in step (1), and mix well;

[0037] (3) Add 25.0 mL of ammonia water, 3.0 mL of formaldehyde and 5.0 mL of epichlorohydrin to the mixture obtained in step (2), stop the reaction after 3.0 hours of cross-linking reaction at 80°C, and generate a cross-linked porous composite;

[0038] (4) Adjust the pH of the solution obtained in step (3) to neutral, separate the product with a magnetic field, wash it repeatedly with deionized water and dry it, and then reflux with absolute ethanol to remove excess cetyl trimethyl bromide ammonium to obtain a magnetic porous adsorbent....

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Abstract

The invention discloses a magnetic porous macromolecular adsorbent and a preparation method thereof. The method includes: taking melamine resin, cetyl trimethyl ammonium bromide, chitosan and ferroferric oxide as the main raw materials, firstly subjecting melamine resin, cetyl trimethyl ammonium bromide and ferroferric oxide to cross-linking reaction under an acidic condition to prepare a magneticfunctional compound, then adding chitosan and a cross-linking agent for deep cross-linking reaction to form a cross-linked porous compound, and then conducting drying and ethanol reflux to obtain thechitosan modified melamine resin magnetic porous adsorbent. The adsorbent has good adsorption effect, can achieve a removal rate on new coccine dye in wastewater up to 99%, also has simple and fast magnetic separation function, is beneficial to simplification of the time-consuming and energy-consuming centrifugation and settlement process commonly used in wastewater treatment, and has good application prospects in sewage treatment field.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a magnetic porous adhesive and a preparation method thereof. Background technique [0002] With the rapid development of modern industry, the massive discharge of industrial wastewater and domestic wastewater has caused water pollution and seriously affected people's healthy life. Therefore, water body governance and water environment protection have become one of the hot issues in today's society. Research on economical and efficient water treatment methods is the focus of the current government and people. At present, wastewater treatment technologies mainly include photocatalytic oxidation, chemical coagulation, biosorption and other technologies, among which biosorption is a simple, effective and economical method with broad application prospects. [0003] Adsorbent is the key core of biosorption. The current adsorbents mainly include porous carbon, ...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30B01J20/28C02F1/28C02F101/30
CPCB01J20/06B01J20/22B01J20/24B01J20/28009B01J2220/46B01J2220/4806B01J2220/4812B01J2220/4825C02F1/281C02F1/285C02F1/286C02F2101/308
Inventor 游力军鲁菲菲许珂丁冠军张其清
Owner FUZHOU UNIV
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