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Composite magnetic nano-particle adsorbent and preparation method and application thereof

A magnetic nanoparticle and composite magnetic technology, applied in separation methods, chemical instruments and methods, adsorbed water/sewage treatment, etc., can solve the problems of insufficient adsorption of macromolecular dyes, difficulty in harmless treatment, and limited use range, etc. Achieve ideal adsorption effect, easy operation, high recovery rate and regeneration rate

Active Publication Date: 2015-10-28
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most studied and most widely used adsorbents are mainly (1) activated carbon adsorption, which is a porous material and has a good adsorption effect on most dyes, but it is difficult to regenerate, and the adsorption capacity for some macromolecular dyes is not enough, so that it has a wide range of applications. (2) Mineral adsorption, which is abundant in nature and low in price, but generally has a low adsorption capacity; (3) Cinder and coal ash adsorbents have a highly developed pore structure and large specific surface area, and the decolorization effect Good, but the disadvantage is that the amount of sludge after treatment is large and the harmless treatment is difficult

Method used

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  • Composite magnetic nano-particle adsorbent and preparation method and application thereof
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  • Composite magnetic nano-particle adsorbent and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Example 1: Preparation of magnetic ferroferric oxide nanoparticles

[0035] 3.5g ferric chloride hexahydrate (FeCl 3 ·6H 2 O) Add 80 mL of ethylene glycol and ultrasound to completely dissolve it, then add 7.2 g of sodium acetate (NaAc) and 2.0 g of polyethylene glycol 2000 (PEG 2000), and heat and stir at 50° C. for 0.5 h. Then transfer the reaction solution to a 100mL autoclave, and react for a certain time from room temperature to 200°C for 6 hours. After the reaction is completed, it is ultrasonically cleaned with absolute ethanol several times, magnetically separated, and dried in a vacuum drying oven at 50°C for 24 hours to obtain magnetic tetroxide. Tri-iron nanoparticles A, figure 1 , figure 2 These are the scanning electron microscope and transmission electron microscope images of Fe3O4 nanoparticles.

Embodiment 2

[0036] Example 2: Preparation of magnetic ferroferric oxide nanoparticles

[0037] 4.5g ferric chloride hexahydrate (FeCl 3 ·6H 2 O) Add 80 mL of ethylene glycol and ultrasound to completely dissolve it, then add 7.2 g of sodium acetate (NaAc) and 2.0 g of polyethylene glycol 2000 (PEG 2000), and heat and stir at 50°C for 1 hour. Then the reaction solution was transferred to a 100mL autoclave, and reacted for a certain period of 8 hours from room temperature to 200°C. After the reaction, it was washed several times with absolute ethanol ultrasonically, magnetically separated, and dried in a 60°C vacuum drying oven for 24 hours to obtain magnetic tetroxide. Three iron nanoparticles B.

Embodiment 3

[0038] Example 3: Preparation of magnetic ferroferric oxide nanoparticles

[0039] 2.5g ferric chloride hexahydrate (FeCl 3 ·6H 2 O) Add 80 mL of ethylene glycol and ultrasound to completely dissolve it, then add 7.2 g of sodium acetate (NaAc) and 2.0 g of polyethylene glycol 2000 (PEG 2000), and heat and stir at 50°C for 1 hour. Then transfer the reaction solution to a 100mL autoclave, and react for a certain time from room temperature to 200°C for 6 hours. After the reaction is completed, it is washed with absolute ethanol for several times, magnetically separated, and dried in a vacuum drying oven at 60°C for 28 hours to obtain magnetic tetroxide. Three iron nanoparticles C.

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Abstract

The invention discloses a composite magnetic nano-particle adsorbent. The composite magnetic nano-particle adsorbent is composed of a carrier and an absorbing component, the carrier is a core-shell composite micro-sphere, the core of the core-shell composite micro-sphere is made of ferroferric oxide, the shell is made of a polymer of porous silicon dioxide, a silane coupling agent and ionic liquid, and the size of the core-shell micro-sphere is 200-600 nm. The magnetic composite nano-particle adsorbent has the advantages that the particle size is uniform, the dispersity is good, the specific saturation magnetization is high, the number of active groups is rich, and the removing effect for azo dyes in water is good.

Description

Technical field [0001] The invention relates to a composite magnetic nano particle adsorbent, a preparation method of the composite magnetic nano particle adsorbent, and the adsorption application of the composite magnetic nano particle adsorbent to the azo dye orange G. Background technique [0002] Azo dyes are currently the most commonly used dyes in the printing and dyeing industry. They usually have one or more azo bonds (–N=N–), and have associated aromatic systems and auxochromes (–OH,–SO). 3 Etc.) Features. Azo dyes have poor biodegradability, high toxicity and potential mutagenic and carcinogenic hazards. [0003] Traditional treatment methods include adsorption, coagulation, biological oxidation, chemical and physical chemical methods, etc. Among them, the adsorption method has become the most widely studied and used because of its relatively low cost, avoidance of secondary pollution and non-toxic side effects. method. The key to this technology is to select high-perfo...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30B01J20/34C02F1/28C02F1/58
Inventor 蔡美强魏晓琴苏洁金米聪宋志军
Owner ZHEJIANG GONGSHANG UNIVERSITY
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