Preparation method and application of composite magnetic nanomaterial based on nanoscale zero-valent iron

A technology of nano-zero-valent iron and composite magnetism, which is applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of weak reducibility, large particles, and difficult storage, and achieve increased removal and preparation The effect of simple method

Inactive Publication Date: 2018-09-28
SUZHOU JONATHAN NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although nZⅥ, as a potential environmental remediation agent, provides a new development direction for environmental remediation, the surface of iron is easily oxidized into Fe 2+ or Fe 3+ , weak reducibility, difficult to preserve and large particles limit its application in shallow water and other fields, so the stability of nZⅥ and how to apply it in the actual industry need to be further studied

Method used

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  • Preparation method and application of composite magnetic nanomaterial based on nanoscale zero-valent iron

Examples

Experimental program
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Effect test

Embodiment 1

[0020] A preparation method based on nano zero-valent iron composite magnetic nanomaterials, the sewage treatment method comprises the following steps:

[0021] Step 1. Take 3 mass parts of nanometer zero-valent iron and join in the reaction container that 40 mass parts dehydrated alcohol, 15 mass parts acetonitrile are housed, then add 6 mass parts cetyltrimethylammonium bromide and 2 mass parts 1 part lecithin, 1 mass part 28wt.% ammonia water, and obtain a suspension after ultrasonication for 15 min.

[0022] Step 2. Under stirring conditions, add 8 parts by mass of ethanol solution dissolved in sodium oleate dropwise to the suspension prepared in step 1, and stir at room temperature for 30 minutes, wherein the mass ratio of sodium oleate to ethanol is 1:50 .

[0023] Step 3. Add 4 parts by mass of tetrabutyl titanate to the mixture in the above step 2. After ultrasonication at room temperature for 10 minutes, transfer the reaction solution into an autoclave, and react at ...

Embodiment 2

[0028] A preparation method based on nano zero-valent iron composite magnetic nanomaterials, the sewage treatment method comprises the following steps:

[0029] Step 1. Take 7 mass parts of nanometer zero-valent iron and join in the reaction container that 60 mass parts dehydrated alcohol, 20 mass parts of acetonitrile are housed, then add 15 mass parts cetyltrimethylammonium bromide, 4 mass parts 1 part lecithin and 3 parts by mass of 28wt.% ammonia water, the suspension was obtained after ultrasonication for 30 min.

[0030] Step 2. Under stirring conditions, add 17 parts by mass of ethanol solution dissolved with sodium oleate dropwise to the suspension prepared in step 1, and stir at room temperature for 45 minutes, wherein the mass ratio of sodium oleate to ethanol is 1:80 .

[0031] Step 3. Add 12 parts by mass of tetrabutyl titanate to the mixture in the above step 2. After ultrasonication at room temperature for 20 minutes, transfer the reaction solution into an autoc...

Embodiment 3

[0036] A preparation method based on nano zero-valent iron composite magnetic nanomaterials, the sewage treatment method comprises the following steps:

[0037] Step 1. Take 5 mass parts of nanometer zero-valent iron and join in the reaction vessel that 55 mass parts dehydrated alcohol, 16 mass parts of acetonitrile are housed, then add 9 mass parts cetyltrimethylammonium bromide and 3 mass parts 1 part of lecithin, 2 parts by mass of 28wt.% ammonia water, and a suspension was obtained after ultrasonication for 20 min.

[0038] Step 2. Under stirring conditions, add 10 parts by mass of ethanol solution dissolved in sodium oleate dropwise to the suspension prepared in step 1, and stir at room temperature for 40 minutes, wherein the mass ratio of sodium oleate to ethanol is 1:70 .

[0039] Step 3. Add 8 parts by mass of tetrabutyl titanate to the mixture in the above step 2, ultrasonicate at room temperature for 15 minutes, transfer the reaction solution into an autoclave, and ...

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Abstract

The invention relates to a preparation method and application of a composite magnetic nanomaterial based on nanoscale zero-valent iron, and belongs to the technical field of composite magnetic nanomaterials. The preparation method particularly comprises the following steps that the nanoscale zero-valent iron is added into a reaction vessel loaded with absolute ethyl alcohol and acetonitrile, thencetyl trimethyl ammonium bromide, lecithin and ammonium hydroxide are added, ultrasonic treatment is conducted, and suspension liquid is obtained; under the condition of stirring, an ethanol solutioninto which sodium oleate is dissolved is dropwise added in the suspension liquid, and stirring is conducted at room temperature; tetrabutyl titanate is added in the mixture, after ultrasonic treatmentis conducted at room temperature, reaction liquid is transferred into a high pressure kettle, and a high-temperature reaction is conducted; after the reaction liquid is cooled to the room temperature, zeolite is added in the mixed liquid, and stirring is conducted; ammonium dibutyl dithiophosphate is added in the mixed liquid obtained after stirring is conducted, and stirring is conducted. The preparation method is simple, the problem that the surface of the nanoscale zero-valent iron is likely to be oxidized to be Fe<2+> or Fe<3+>, and reducibility is poor can be solved, and the removal effect of the nanoscale zero-valent iron on heavy metal ions in a water body is greatly increased.

Description

technical field [0001] The invention belongs to the technical field of composite magnetic nanometer materials, and in particular relates to a preparation method and application of nanometer zero-valent iron-based composite magnetic nanometer materials. Background technique [0002] With the development of industry, the problem of heavy metal pollution in water has become increasingly prominent, and a large amount of heavy metals (such as Pb 2+ 、As 3+ 、Cu 2+ 、Cr 6+ 、Co 3+ , Mn + and Hg 2+ ) with the discharge of industrial wastewater into natural water bodies, resulting in heavy metal pollution in water bodies. Such pollutants mainly come from industrial wastewater discharged from mining and oil well mining, electroplating metal processing, metallurgy, plastics, tanning, steel, paint and coatings, etc. Heavy metals can cause obvious toxicity to microorganisms even at low concentrations, and can directly enter water, air and soil, causing environmental pollution, and ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/70C02F101/20
CPCC02F1/705C02F2101/20
Inventor 吕少波李卓才李苏杨
Owner SUZHOU JONATHAN NEW MATERIALS TECH
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