Preparation method and application of composite magnetic chitosan adsorption material

An adsorption material, chitosan technology, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal compounds, etc., can solve the problems of poor adsorption capacity and small number of magnetic chitosan functional groups, etc., and achieve good adsorption capacity , Uniform shape and good stability

Inactive Publication Date: 2019-02-12
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For the above-mentioned deficiencies that exist in the prior art, the purpose of the present invention is to solve the functional group quantity of magnetic chitosan is few, the problem that adsorption capacity is relatively poor, a kind of preparation method of composite magnetic chitosan adsorption material is provided, the method prepared Composite magnetic chitosan adsorption material has excellent adsorption capacity, strong stability, and easy separation and recovery

Method used

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  • Preparation method and application of composite magnetic chitosan adsorption material
  • Preparation method and application of composite magnetic chitosan adsorption material
  • Preparation method and application of composite magnetic chitosan adsorption material

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Embodiment 1

[0026] One, the preparation method of composite magnetic chitosan, comprising:

[0027] 1) Preparation of magnetic chitosan

[0028] Dissolve 6g of chitosan and 3g of ferric oxide in 120 mL of 1% acetic acid solution and stir for 12 hours to form a uniform black mixture; add 5 mL of Span 80 to 720 mL of cyclohexane and stir for 1 hour to form a white suspension Slowly add the black mixture into the suspension of Span 80 and cyclohexane under stirring state, raise the temperature to 50°C, then add 3.7 mL of glutaraldehyde with a mass fraction of 50%, react for 1 hour, and use Wash with alcohol for 3 times, then wash with water for 3 times, and dry in vacuum at 60° C. to obtain magnetic chitosan. The scanning electron micrograph of the magnetic chitosan that makes sees figure 1 Middle b1 and b2.

[0029]2) Activation of nitrilotriacetic acid

[0030] Dissolve 1 g of nitrilotriacetic acid into 50 mL of 1% ammonia solution, add 0.5 g of N-hydroxysuccinimide and 0.5 g of 1-ethy...

Embodiment 2

[0050] One, the preparation method of present embodiment graft type magnetic chitosan adsorbent comprises the steps:

[0051] 1) Preparation of magnetic chitosan

[0052] Dissolve 6g of chitosan and 3g of ferric oxide in 120 mL of 1% acetic acid solution, stir for 12 hours to form a uniform black mixture; add 5 mL of Span 80 to 720 mL of cyclohexane, stir for 1 hour to form a white suspension , while stirring, slowly add the black mixture into the suspension of Span 80 and cyclohexane, raise the temperature to 50°C, then add 3.7 mL of glutaraldehyde with a mass fraction of 50%, and react for 1 hour. After the reaction is completed, wash with alcohol Washing for 3 times, then washing with water for 3 times, and vacuum drying at 60° C. to obtain magnetic chitosan.

[0053] 2) Activation of nitrilotriacetic acid

[0054] Dissolve 0.5, 1, 1.2, 1.5, 2 g of nitrilotriacetic acid into 25 mL of ammonia solution with a mass fraction of 1% respectively, record as c, d, e, f, g, and ad...

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Abstract

The invention discloses a preparation method for a composite magnetic chitosan adsorption material. The preparation method comprises the steps that magnetic chitosan is dispersed in deionized water, diethylenetriamine is added, uniform shaking is carried out, then activated nitrilotriacetic acid is added, uniform mixing is carried out, then the mixture is put into a high-temperature condition forreaction, then washing is carried out with deionized water, and drying is carried out so as to obtain the composite magnetic chitosan adsorption material, wherein the mass volume ratio of the magneticchitosan to a diethylenetriamine solution is 1 g:10-120 mL, and the mass ratio of the magnetic chitosan to nitrilotriacetic acid is 1:0.1-5. The adsorption material prepared through the method has the advantages of being excellent in adsorption capacity, high in stability and easy to separate and recycle; and in addition, the method has the advantages of being simple and easy to operate, low in instrument and equipment requirement and short in preparation period. The invention also provides application of the composite magnetic chitosan adsorption material in removal of tetracycline antibiotics in water. According to the application of the composite magnetic chitosan adsorption material, the tetracycline antibiotics include but are not limited to tetracycline, chlortetracycline, oxytetracycline and doxycycline.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a preparation method and application of a composite magnetic chitosan adsorption material. Background technique [0002] Since the discovery of penicillin in the 19th century, the research and use of antibiotics has developed rapidly. Antibiotics have been widely used in medical treatment, poultry farming, aquaculture and food processing. However, most of the antibiotics used cannot be completely absorbed by the organism, and the unabsorbed antibiotics and their metabolites are excreted into the environment, especially in the water environment, through various channels. However, antibiotics in the water environment can induce pathogens to develop drug resistance, produce some antibiotic-resistant pathogens, and induce some drug-resistant genes, threatening the health of humans and animals. Moreover, antibiotics have a bactericidal effect, which will kill non-resistant m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28C02F1/28B01J20/30
CPCB01J20/06B01J20/24B01J20/28009C02F1/281C02F1/286C02F2101/306
Inventor 郑怀礼王永娟郑超凡肖伟龙孙强向文英丁魏
Owner CHONGQING UNIV
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