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Preparation method and application of magnetic HACC/oxidized multi-walled carbon nanotube adsorbent

A multi-walled carbon nanotube and adsorbent technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problem that chitosan derivatives are rarely studied, and achieve good physical Good chemical properties, good desorption properties and high adsorption efficiency

Inactive Publication Date: 2015-01-21
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Meanwhile, due to the presence of hydroxyl and amino groups, chitosan has also been widely used to adsorb heavy metal ions, while chitosan derivatives have rarely been studied.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 Preparation of a magnetic HACC / oxidized multi-walled carbon nanotube adsorbent

[0019] Add 0.2g of hydroxypropyltrimethylammonium chloride chitosan HACC to 20mL of water and 5mL of glacial acetic acid solution, sonicate at room temperature for 2h, add 0.10g of magnetically aminated ferric oxide, stir for 1h, and slowly stir Add 3mL of liquid paraffin, continue to stir for 0.5h, add 3mL, 25% glutaraldehyde to cross-link hydroxypropyltrimethylammonium chloride chitosan HACC, at the same time, add 0.1g of oxidized multi-walled carbon nanotubes, at 50oC React for 1.5h, adjust the pH to 9~10 with 2mol / L NaOH, keep at 80oC for 1h, and wash the obtained product with petroleum ether, ethanol, and deionized water in turn until the pH is 7.0, and a magnetic HACC / polyoxidized Walled carbon nanotube adsorbents.

Embodiment 2

[0020] Example 2 Preparation of a magnetic HACC / oxidized multi-walled carbon nanotube adsorbent

[0021] Add 0.4g of hydroxypropyltrimethylammonium chloride chitosan HACC into 20mL of water and 5mL of glacial acetic acid solution, ultrasonicate at room temperature for 3h, add 0.15g of magnetic aminated ferric oxide, stir for 1.5h, and slowly stir Add 3mL of liquid paraffin, continue to stir for 0.8h, add 3mL, 25% glutaraldehyde to cross-link hydroxypropyltrimethylammonium chloride chitosan HACC, at the same time, add 0.15g of oxidized multi-walled carbon nanotubes, at 50oC The reaction was carried out for 1.7 h, the pH was adjusted to 9~10 with 2 mol / L NaOH, and kept at 80oC for 1 h, and the obtained product was washed with petroleum ether, ethanol, and deionized water in turn until the pH was 7.0, and a magnetic HACC / oxidized Multi-walled carbon nanotube adsorbent.

Embodiment 3

[0022] Example 3 Preparation of a magnetic HACC / oxidized multi-walled carbon nanotube adsorbent

[0023] Add 0.6g of hydroxypropyltrimethylammonium chloride chitosan HACC into 20mL of water and 5mL of glacial acetic acid solution, sonicate at room temperature for 4h, add 0.20g of magnetic aminated ferric oxide, stir for 2h, under slow stirring Add 3mL of liquid paraffin, continue to stir for 1h, add 3mL, 25% glutaraldehyde to cross-link hydroxypropyltrimethylammonium chloride chitosan HACC, at the same time, add 0.2g of oxidized multi-walled carbon nanotubes, and react at 50oC 2h, use 2mol / L NaOH to adjust the pH at 9~10, keep it at 80oC for 1h, and wash the obtained product with petroleum ether, ethanol, and deionized water successively until the pH is 7.0 to prepare a magnetic HACC / oxidized multi-walled carbon nanotube adsorbent.

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Abstract

The invention discloses a preparation method and application of a magnetic HACC (Hydroxypropyl Trimethyl Ammonium Chloride Chitosan) / oxidized multi-walled carbon nanotube adsorbent. The preparation method is characterized by comprising the steps: adding 0.2-0.6 g HACC into a solution formed by 20 mL water and 5 mL glacial acetic acid, performing ultrasonic treatment at room temperature for 2-4 h, adding 0.05-0.20 g magnetic amination ferroferric oxide and stirring for 1-2 h, adding 3 mL liquid paraffin while stirring slowly, carrying on stirring for 0.5-1 h, adding 3 mL 25% glutaraldehyde to crosslink HACC, meanwhile, adding 0.1-0.2 g oxidized multi-walled carbon nanotube for reaction at 50 DEG C for 1.5-2 h, adjusting pH within 9-10 by using 2 mol / L NaOH, keeping at 80 DEG C for 1 h, washing an obtained product until pH is 7.0 sequentially by using petroleum ether, ethanol and de-ionized water to prepare the magnetic HACC / oxidized multi-walled carbon nanotube adsorbent. The adsorbent is simple and practicable in preparation method, high in adsorption capacity of adsorbing heavy metal and high in adsorption as well as separation speed, can be utilized repeatedly, and obtains excellent effects on treating heavy metal in waste water, and no secondary pollution exists in the adsorption process.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a preparation method of a magnetic hydroxypropyltrimethylammonium chloride chitosan HACC / oxidized multi-walled carbon nanotube adsorbent and an application technology for adsorption of heavy metal ions in water treatment . Background technique [0002] With the development of industries such as mining and chemical industry, a large amount of wastewater containing heavy metals is discharged into the soil, water and air, threatening people's health. Heavy metal ions such as lead, mercury, chromium, and cadmium are non-biodegradable persistent pollutants that can enter the human body through the food chain. Once ingested by the human body, they will cause serious harm. [0003] Methods for removing heavy metal ions include chemical precipitation, ion exchange, membrane separation, flocculation and electrolysis. However, these methods are costly, complex, and difficult to m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
CPCB01J20/06B01J20/205B01J20/24C02F1/281C02F1/283C02F1/286C02F1/288C02F2101/20
Inventor 魏琴王耀光杜斌闫涛魏东胡丽华闫良国王晓东
Owner UNIV OF JINAN
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