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Preparation method of nano magnetic particles for sewage treatment

A nano-magnetic particle and sewage treatment technology, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of complex nano-magnetic particle process, high cost, poor stability, etc. Achieve good affinity, high oil removal rate, and quickly clean up oil droplets

Inactive Publication Date: 2018-12-25
SUZHOU AIBOMAIER NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing nano-magnetic particles with high-efficiency degreasing effects often face the problems of complex process, high cost, and poor stability, which limit their large-scale popularization and application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 25g Fe 3 o 4 Add 100mL of NaOH aqueous solution with pH=9.0 to the nano-magnetic particles, heat and stir at 60°C for 1h, filter and add to an equal volume of ethanol solution. Use glacial acetic acid to adjust the above suspension to pH=4.0, ultrasonically disperse for 15min, N 2 Heated and stirred at 60°C under protection and added dropwise 0.25g of tetramethoxysilane, stirred at 60°C for 12 hours after the dropwise addition, filtered, washed with acetone, and dried in vacuum at room temperature. Add the dried nano-magnetic particles into deionized water, add 0.5g of 1-azidoethyl polyethylene glycol monooleate (the degree of polymerization of ethylene glycol is 30), N 2 Stir under protection, and irradiate with ultraviolet light with a wavelength of 280nm for 1h to collect Fe 3 o 4 particle. The prepared nano-magnetic particles are used for emulsified edible oil sewage treatment, pH=7, turbidity=900NTU, particle dosage is 200mg / L, the removal rate is greater than...

Embodiment 2

[0025] 25g Fe 3 o 4 Add 100mL of NaOH aqueous solution with pH=9.0 to the nano-magnetic particles, heat and stir at 60°C for 1h, filter and add to an equal volume of ethanol solution. Use glacial acetic acid to adjust the above suspension to pH=4.0, ultrasonically disperse for 15min, N 2 Heated and stirred at 60°C under protection and added dropwise 0.25g of tetramethoxysilane, stirred at 60°C for 12 hours after the dropwise addition, filtered, washed with acetone, and dried in vacuum at room temperature. Add the dried nano-magnetic particles into deionized water, add 0.5g of 1-azidoethyl polyethylene glycol monooleate (the degree of polymerization of ethylene glycol is 30), N 2 Stir under protection, and irradiate with ultraviolet light with a wavelength of 280nm for 1h to collect Fe 3 o 4 particle. The prepared nano-magnetic particles are used for emulsified edible oil sewage treatment, pH=11, turbidity=900NTU, particle dosage is 200mg / L, the removal rate is greater tha...

Embodiment 3

[0027] 25g Fe 3 o 4 Add 100mL of ammonia solution with pH=9.0 to the nano-magnetic particles, heat and stir at 60°C for 1h, filter and add to an equal volume of ethanol solution. Use hydrochloric acid to adjust the above suspension to pH=4.0, ultrasonically disperse for 15min, N 2 Heated and stirred at 60°C under protection and added dropwise 0.25g of tetramethoxysilane, stirred at 60°C for 12 hours after the dropwise addition, filtered, washed with acetone, and dried in vacuum at room temperature. Add the dried nano-magnetic particles into deionized water, add 0.5g of 1-azidoethyl polyethylene glycol behenyl ester (the degree of polymerization of ethylene glycol is 20), N 2 Stir under protection, and irradiate with ultraviolet light with a wavelength of 280nm for 1h to collect Fe 3 o 4 particle. The prepared nano-magnetic particles are used for emulsified crude oil sewage treatment, pH=5, turbidity=1000NTU, particle dosage is 200mg / L, the removal rate is greater than 95%...

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PUM

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Abstract

The invention provides a preparation method of nano magnetic particles for sewage treatment. The method includes the steps of firstly, processing Fe3O4 nano magnetic particles with an alkaline solution; secondly, modifying the nano magnetic particles obtained in the first step with tetramethoxysilane; thirdly, coupling the nano magnetic particles obtained after the second step with PEG polymer with photoreaction groups and aliphatic chains to obtain the nano magnetic particles grafted with the aliphatic chains. The preparation method has the advantages that the prepared nano magnetic particleshave a hydrophilic structure and a hydrophobic structure, can keep good dispersing performance in an aqueous solution, have good affinity to oily pollutants, and are easy to achieve fast oil drop cleaning and high in oil removing rate; meanwhile, the prepared nano magnetic particles are stable in grafting structure and capable of being repeatedly used after recycling and washing, and actual testsshow that the nano magnetic particles can be reused for 15-20 times.

Description

technical field [0001] The invention relates to the synthesis of a nano-magnetic particle that can be applied to sewage treatment, in particular to a Fe with PEG molecules grafted with fatty chains on the surface 3 o 4 nanomagnetic particles. Background technique [0002] Nano-magnetic particles have good application prospects in the field of sewage treatment. The existing technology mainly uses amphiphilic polymers to treat Fe 3 o 4 Nanoparticles are modified by grafting on the surface, so that the polymer and oily pollutants can be adsorbed with affinity, and then the rapid separation of nanomagnetic particles in water can be realized under the action of an external magnetic field. This kind of technology has the advantages of simple process, high efficiency, easy recovery and reuse in the treatment of oily pollutants in sewage, and it is of great help to solve the problem of water pollution in the process of oil extraction, transportation and processing. However, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/40C02F1/48B01J20/26B01J20/28B01J20/30
CPCB01J20/26B01J20/28009C02F1/285C02F1/40C02F1/48
Inventor 李子寅陈晋纳
Owner SUZHOU AIBOMAIER NEW MATERIAL CO LTD
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