Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method and application of polyamine compound modified magnetic chitosan

A chitosan, amine modification technology, applied in the directions of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problems of small adsorption capacity, long adsorption time, difficult separation, etc. High, good adsorption effect

Inactive Publication Date: 2016-08-03
QINGDAO UNIV OF SCI & TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the disadvantages of small adsorption capacity, long adsorption time, difficult separation, difficult recovery and low reutilization rate of the adsorption material in the current heavy metal wastewater treatment. It uses chitosan as the matrix and combines nanotechnology and magnetic separation technology to design and synthesize a A polyamine compound modified magnetic chitosan nano-adsorbent is used for the treatment of heavy metal wastewater, which greatly improves its adsorption capacity and adsorption rate, is easy to operate, realizes rapid water-agent separation, and has good reusability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method and application of polyamine compound modified magnetic chitosan
  • A kind of preparation method and application of polyamine compound modified magnetic chitosan
  • A kind of preparation method and application of polyamine compound modified magnetic chitosan

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The chitosan used has a degree of deacetylation greater than 90% and was purchased from Shanghai Lanji Technology Development Co., Ltd.

[0024] (1) Preparation of Triethylenetetramine Modified Chitosan

[0025] Dissolve 1g of chitosan (CS) in 100ml of 2% acetic acid solution, add 20ml of dimethylsulfoxide, and swell for 2h; add it to the lye for precipitation while stirring, filter with suction, wash with acetone, and pump to semi-dry. Transfer it to 100ml of acetone, stir to form a suspension, drop 5ml of epichlorohydrin, and adjust the temperature to 35°C to react for 24h. Then add 6ml of triethylenetetramine, adjust the temperature to 60℃ and react for 6h, then add 10ml of triethylenetetramine, 50ml of 1mol / L sodium hydroxide solution, 0.05g potassium iodide, continue to stir and react for 4h, cool, filter and use in order Fully washed with ionized water, absolute ethanol and acetone, and dried under vacuum at 60°C to obtain a yellow product (TETA-CS).

[0026] (2) Carbo...

Embodiment 2

[0033] Steps (1) and (3) are the same as in Example 1

[0034] (2) Carboxymethylation of triethylenetetramine modified chitosan

[0035] Take 1.5g of the product in (1) in a three-necked flask, add 20ml of dimethyl sulfoxide and 10ml of 5mol / L sodium hydroxide solution, stir for 2h at 30°C; dissolve 5g of chloroacetic acid in 15ml of water, and mix with alkali Hecheng is slightly alkaline. Add 1g potassium iodide into the flask, then add 0.1g cetyltrimethylammonium bromide, adjust the temperature to 70℃ and react for 5h. After cooling to room temperature, it was pumped and washed thoroughly with deionized water, absolute ethanol and acetone in sequence, and dried under vacuum at 60° C. to obtain a yellow product (TETA-CMCS).

[0036] Invention effect

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
adsorption capacityaaaaaaaaaa
Login to View More

Abstract

The present invention proposes a preparation method and application of polyamine compound-modified magnetic chitosan. First, chitosan is swollen with 2% acetic acid solution, and then triethylenetetramine is connected to chitosan molecules by epichlorohydrin After that, the above product was carboxymethylated with chloroacetic acid, and finally N, N-dimethylformamide was used as a solvent to introduce magnetic ferric iron tetroxide into three Ethylenetetramine was grafted into chitosan molecules to obtain the target adsorbent. The adsorbent of the present invention is mainly used for adsorption treatment of waste water polluted by heavy metal ions. It can absorb and recover a single heavy metal ion, and can also perform adsorption treatment on waste water polluted by various heavy metal ions, and it has good adsorption effect, It has the advantages of no secondary pollution, easy separation, reusability, cheap and easy-to-obtain raw materials, etc. It is a potential heavy metal wastewater treatment agent.

Description

Technical field [0001] The invention relates to a preparation method of polyamine compound modified magnetic chitosan. The prepared product is mainly used for adsorption treatment of waste water polluted by heavy metal ions. It is a potential waste water treatment agent and belongs to the field of heavy metal ion waste water treatment. Background technique [0002] Heavy metal pollution is one of the three major water pollution methods in the world today. After entering the environment, heavy metals cannot be biodegraded, and will accumulate in the organism, disrupt normal metabolic activities, and endanger health. Some heavy metals also have carcinogenic effects. At present, the treatment methods of heavy metal wastewater adopted by countries all over the world mainly include: precipitation method, electrochemical method, membrane separation method, adsorption method, etc. Among them, the adsorption method of chitosan and its derivatives has become one of the research hotspots ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/08B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20
CPCY02P20/582
Inventor 吴占超王召占匡少平
Owner QINGDAO UNIV OF SCI & TECH