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Magnetic nano-particle adsorbent and preparation method and application thereof

A magnetic nanoparticle and nanoparticle technology, applied in the field of water pollution treatment, can solve the problems of intolerance to water quality environment, no specificity, low adsorption capacity, etc., and achieve the effect of low cost, fast elution, and large adsorption capacity

Inactive Publication Date: 2016-01-27
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, unmodified nano-magnetic particles are not very good adsorbents for pollutants. The exposed nano-magnetic particles have no specificity for pollutants, low adsorption capacity, intolerant to harsh water quality environments, and poor regeneration.

Method used

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  • Magnetic nano-particle adsorbent and preparation method and application thereof
  • Magnetic nano-particle adsorbent and preparation method and application thereof
  • Magnetic nano-particle adsorbent and preparation method and application thereof

Examples

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preparation example Construction

[0019] In a second aspect, the present invention provides a method for preparing a magnetic nanoparticle adsorbent, comprising the following steps:

[0020] (1) Fe 3 o 4 After mixing the nanoparticles with ethanol and concentrated ammonia water evenly, heat them in the reaction vessel to 30-50°C, maintain a constant temperature, add tetraethyl orthosilicate dropwise after 4-6 minutes, and magnetically separate the magnetic particles after 24-36 hours of reaction, and wash to obtain Coated intermediate product particles;

[0021] (2) Mix the coated intermediate product particles obtained in step (1) with toluene evenly, stir and heat in the reaction vessel to 30-50°C, maintain a constant temperature, and add 3-aminopropyltriethoxy dropwise after 5-30min base silane, after 24-36 hours of reaction, magnetically separate the magnetic particles and wash to obtain the intermediate product particles after connection;

[0022] (3) Mix the connected intermediate product particles ob...

Embodiment 1

[0030] (1) With 2.6gFe 3 o 4 Nanoparticles are the precursor, ethanol is the solvent, add concentrated ammonia water with a mass fraction of 30%, accounting for 4.25% of the total volume; mix well, heat to 40°C in a constant temperature stirring water bath in a reaction vessel, maintain a constant temperature, and add dropwise after 5 minutes Tetraethyl orthosilicate, accounted for Fe 3 o 4 0.5 times the mass of nanoparticles; after 24 hours of reaction, magnetically separate the magnetic particles, wash with ethanol and toluene, and obtain coated intermediate product particles;

[0031] (2) Disperse the magnetic particles obtained in step (1) in toluene, mix them evenly, heat them in a constant temperature stirring water bath to 40°C in a reaction vessel, maintain a constant temperature, add 3-aminopropyltriethoxysilane dropwise after 5 minutes, accounted for Fe 3 o 4 0.8 times the mass of nanoparticles; after 24 hours of reaction, the magnetic particles are magnetically...

Embodiment 2

[0042] (1) With 2.6gFe 3 o 4 Nanoparticles are the precursor, ethanol is the solvent, add concentrated ammonia water with a mass fraction of 30%, accounting for 4.25% of the total volume fraction; after mixing evenly, heat it to 30°C in a constant temperature stirring water bath in a reaction vessel, maintain a constant temperature, and add dropwise after 4 minutes Tetraethyl orthosilicate, accounted for Fe 3 o 4 0.4 times the mass of nanoparticles; after 24 hours of reaction, the magnetic particles are separated magnetically, washed with ethanol and toluene, and the coated intermediate product particles are obtained;

[0043] (2) Disperse the magnetic particles obtained in step (1) in toluene, mix them evenly, heat them in a constant temperature stirring water bath in the reaction vessel to 30°C, maintain a constant temperature, add 3-aminopropyltriethoxysilane dropwise after 5 minutes, accounted for Fe 3 o 4 0.6 times the mass of nanoparticles; after 24 hours of reactio...

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Abstract

The invention discloses a magnetic nano-particle adsorbent, which has the advantages that better stability and acid-alkali resistance are obtained; a preparation method is low in cost, and equipment and technology are simple; a magnetic separation technology is adopted, steps are quick and simple, and the separating equipment, such as a centrifugal machine, is unnecessary, so that large-scale application is conveniently realized. The magnetic nano-particle adsorbent provided by the invention is modified by means of connecting a selective adsorbent, so that the selective adsorption of Pb2+, Cu2+ and malachite green is realized, the adsorption rate is fast, the absorption amount is large, and the effects of fast elution and recyclability can be achieved, the production cost is greatly reduced, and the effects of greenness and environment friendliness are achieved.

Description

technical field [0001] The invention belongs to the field of water pollution treatment, and in particular relates to a magnetic nanoparticle adsorbent and a preparation method and application thereof. Background technique [0002] The treatment of heavy metal and dye wastewater is the focus of attention of the environmental protection industry. Heavy metals cannot be biodegraded and are easily enriched in water, causing water pollution and ultimately endangering human health. At the same time, my country's printing and dyeing industry is mostly produced in small batches, most of which are intermittent operations, and the wastewater is intermittently discharged. Therefore, the concentration of dyes in the wastewater is high, and the wastewater components are complex, high in concentration, and deep in color, which is difficult to treat. There are many ways to remove heavy metal ions in water. The traditional treatment methods are chemical precipitation, membrane filtration, ...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28
Inventor 陈守文袁弘伦杨代凯曾昭睿魏雪团马昕杨欢
Owner HUBEI UNIV
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