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Magnetic chitosan nanoparticle adsorbent, and preparation method and application thereof

A technology of chitosan nano and particle adsorbents, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc. Block clogging and other problems, to achieve the effect of abundant quantity, saving synthesis time, and improving acid resistance

Active Publication Date: 2014-02-12
常州通用自来水有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, powdered chitosan is difficult to separate from the solution, and due to its good hydrophilicity, it is easy to swell and agglomerate in the solution to cause blockage. Popularization and application in water treatment

Method used

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  • Magnetic chitosan nanoparticle adsorbent, and preparation method and application thereof
  • Magnetic chitosan nanoparticle adsorbent, and preparation method and application thereof
  • Magnetic chitosan nanoparticle adsorbent, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Dissolution: Weigh 0.5g of chitosan and dissolve it in 200mL of 0.5% acetic acid aqueous solution by volume fraction to prepare a 0.25% mass fraction of chitosan acetic acid aqueous solution, and let it stand until the chitosan is completely dissolved.

[0040] Chitosan and Fe 2+ , Fe 3+ Preparation of the mixed solution: Pour the completely dissolved chitosan acetic acid aqueous solution into a three-necked flask, place the three-necked flask in a water bath, set a constant temperature water bath at 40°C, start the mechanical stirring device, and stir at 1000r / min, and pour to the three-necked flask during the stirring process. In the flask, pour 2.4g of FeSO dissolved in deionized water in sequence 4 ·7H 2 O and 4.7 g FeCl 3 ·6H 2 O, the mass fraction of ferrous sulfate aqueous solution is 8%, the mass fraction of ferric chloride aqueous solution is 20%, stir 20min under this condition.

[0041] Chitosan-Fe 3 o 4 Preparation of the complex: Slowly add 40 mL of ...

Embodiment 2

[0045] Dissolution: Weigh 0.4g of chitosan and dissolve it in 200mL of 0.2% acetic acid aqueous solution by volume fraction to prepare a 0.2% chitosan acetic acid aqueous solution, and let stand until the chitosan is completely dissolved.

[0046] Chitosan and Fe 2+ , Fe 3+ Preparation of the mixed solution: Pour the completely dissolved chitosan acetic acid aqueous solution into a three-necked flask, place the three-necked flask in a water bath, set a constant temperature water bath at 30°C, start the mechanical stirring device, stir at 700r / min, and pour the three-necked flask into the three-necked flask during the stirring process. Pour 1.2g of FeSO dissolved in deionized water into the flask successively 4 ·7H 2 O and 2.4 g FeCl 3 ·6H 2 O, the mass fraction of ferrous sulfate aqueous solution is 5%, the mass fraction of ferric chloride aqueous solution is 25%, stir 30min under this condition.

[0047] Chitosan-Fe 3 o 4 Preparation of the complex: Slowly add 20 mL of...

Embodiment 3

[0051] Dissolution: Weigh 0.8g chitosan and dissolve it in 200mL 0.6% acetic acid aqueous solution by volume fraction to prepare chitosan acetic acid aqueous solution with a mass fraction of 0.4%, and let stand until the chitosan is completely dissolved.

[0052] Chitosan and Fe 2+ , Fe 3+ Preparation of the mixed solution: Pour the completely dissolved chitosan acetic acid aqueous solution into a three-necked flask, place the three-necked flask in a water bath, set a constant temperature water bath at 50°C, start the mechanical stirring device, stir at 1500r / min, and pour the three-necked flask into the three-necked flask during the stirring process. Pour in the flask successively the 6.4g FeSO that has been dissolved with deionized water 4 ·7H 2 O and 11.2 g FeCl 3 ·6H 2 O, the mass fraction of ferrous sulfate aqueous solution is 10%, the mass fraction of ferric chloride aqueous solution is 15%, stir 10min under this condition.

[0053] Chitosan-Fe 3 o 4 Preparation o...

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Abstract

The invention provides a magnetic chitosan nanoparticle adsorbent. The structural formula of the magnetic chitosan nanoparticle adsorbent is as shown in the specification. The invention also provides a preparation method of the magnetic chitosan nanoparticle adsorbent. The magnetic chitosan nanoparticle adsorbent provided by the invention is even in grain size, good in dispersibility, high in specific saturation magnetization and abundant in active group quantity has a good removal effect on natural organic matters. The preparation method is simple and easy to control the preparation process. The prepared magnetic chitosan nanoparticle adsorbent is stable in quality.

Description

technical field [0001] The invention relates to a magnetic chitosan nano particle adsorbent, a preparation method of the magnetic chitosan nano particle adsorbent, and an application of the magnetic chitosan nano particle adsorbent in water treatment. Background technique [0002] Natural organic matter (Natural organic matter, NOM) mainly refers to a type of macromolecular organic matter produced by animals and plants in the process of natural circulation through decay and decomposition. It is the main component of organic matter in natural water bodies, mainly including humus, microbial secretions, dissolved animal and plant tissues, etc. The main components of NOM are humus, which accounts for 50-90% of NOM; for example, humic acid (HA) and fulvic acid (FA) produced by plant decay and decomposition are the main components of humus. NOM is the main cause of water chroma and odor. At the same time, NOM also participates in the migration and transformation of heavy metal io...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28
Inventor 陈卫刘成董长龙
Owner 常州通用自来水有限公司
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