Magnetic nanoparticle for removing perfluorinated compounds, and preparation method thereof

A technology of magnetic nanoparticles and perfluorinated compounds, which is applied in the direction of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problems of easy aggregation of nanoparticles, poor stability, and the impact of treatment and application. Achieve fast adsorption rate, increase stability, and good modification effect

Pending Publication Date: 2021-08-06
TAIAN DETU AUTOMATION INSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing patent literature, there is no research on magnetic and polymer modified nanoparticles for the removal of perfluorinated compounds
In addition, the use of inorganic heavy metal salts to modify the surface of ferroferromagnetic nanoparticles directly may make the nanoparticles easy to aggregate and have poor stability, thus affecting the actual treatment application.

Method used

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  • Magnetic nanoparticle for removing perfluorinated compounds, and preparation method thereof
  • Magnetic nanoparticle for removing perfluorinated compounds, and preparation method thereof
  • Magnetic nanoparticle for removing perfluorinated compounds, and preparation method thereof

Examples

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Effect test

Embodiment 1

[0035] A magnetic nanoparticle for the removal of perfluorinated compounds, containing magnetic ferric iron tetroxide, silica, polysodium 4-styrenesulfonate (PSS) and polydimethyldiallylammonium chloride (pDADMAC) ; said perfluorinated compounds are perfluorocarboxylic acid (PFCA) and perfluorosulfonic acid (PFSA).

[0036]The polysodium 4-styrene sulfonate and polydimethyl diallyl ammonium chloride are coated on the surface of the magnetic ferric iron tetroxide by a layer-by-layer self-assembly method.

[0037] A preparation method for magnetic nanoparticles used to remove perfluorinated compounds is carried out according to the following steps:

[0038] 1) Prepare the mixed solution: add 70 mmol / L sodium citrate, 150 mmol / L urea, 7.5 mg / mL polyacrylamide and 25 mmol / L ferric chloride to 15 mL deionized water to obtain the mixed solution;

[0039] 2) Preparation of crude product: Treat the mixed solution under 60W ultrasonic treatment for 1 hour, keep the ultrasonically trea...

Embodiment 2

[0055] A magnetic nanoparticle for removing perfluorinated compounds, containing magnetic ferric iron tetroxide, silicon dioxide, polysodium 4-styrene sulfonate and polydimethyldiallylammonium chloride; the perfluorinated compounds are perfluorocarboxylic acids and perfluorosulfonic acids.

[0056] The polysodium 4-styrene sulfonate and polydimethyl diallyl ammonium chloride are coated on the surface of the magnetic ferric iron tetroxide by a layer-by-layer self-assembly method.

[0057] A preparation method for magnetic nanoparticles used to remove perfluorinated compounds is carried out according to the following steps:

[0058] 1) Prepare the mixed solution: add 70 mmol / L sodium citrate, 150 mmol / L urea, 7.5 mg / mL polyacrylamide and 25 mmol / L ferric chloride to 15 mL deionized water to obtain the mixed solution;

[0059] 2) Preparation of crude product: Treat the mixed solution under 60W ultrasonic treatment for 1 hour, keep the ultrasonically treated mixed solution at 200...

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Abstract

The invention relates to a magnetic nanoparticle for removing perfluorinated compounds, and a preparation method thereof. The magnetic nanoparticle is characterized in that the magnetic nanoparticle contains magnetic ferroferric oxide, silicon dioxide, poly(4-sodium styrene sulfonate) and polydimethyldiallylammonium chloride. The magnetic nanoparticle is applied to treatment of perfluorinated compounds, and has the advantages of high removal speed and good removal effect.

Description

technical field [0001] The invention relates to a magnetic nanoparticle for removing perfluorinated compounds and a preparation method thereof. Background technique [0002] Perfluorinated compounds (PFC) are a new focus of organic pollutants in the field of drinking water treatment. Due to the presence of difficult-to-break carbon-fluorine bonds in their structure, perfluorinated compounds have high thermal and chemical stability, and are widely used in the manufacture of common household items and industrial products, such as non-stick pan coatings, fire-resistant and waterproof Clothing materials, detergents and personal care products, etc. The high stability of perfluorinated compounds makes it difficult to be hydrolyzed, photolyzed or biodegraded in the natural environment, and they are bioaccumulative. The two most common types of perfluorinated compounds in the natural environment and drinking water systems are perfluorocarboxylic acids (Perfluoroalkyl Carboxylic Ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30B01J20/28C02F1/28C02F101/34C02F101/36
CPCB01J20/06B01J20/103B01J20/261B01J20/28009B01J2220/46B01J2220/4806B01J2220/4812C02F1/281C02F1/285C02F2101/34C02F2101/36C02F2101/40
Inventor 刘川王君玲
Owner TAIAN DETU AUTOMATION INSTR
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