Group enhanced type magnetic nanometer water treatment agent and preparation method and application thereof

A water treatment agent, magnetic nano technology, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve low adsorption efficiency, irregular shape, wide particle size distribution, etc. problem, to achieve a stable effect

Inactive Publication Date: 2017-07-18
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, ferroferric oxide has been extensively studied as a magnetic water treatment agent based on the treatment of heavy metal wastewater. However, there are still some deficiencies in the ferroferric oxide magnetic nanomaterials currently used in the field of water treatment: Wide particle size distribution, irregular shape, poor dispersion stability, complex preparation process, single type of adsorbed heavy metal ions, low adsorption efficiency and large amount of sediment, etc., lead to the current treatment process of heavy metal wastewater is not environmentally friendly, high treatment cost and Disadvantages such as long processing time and low removal rate of heavy metal ions

Method used

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  • Group enhanced type magnetic nanometer water treatment agent and preparation method and application thereof
  • Group enhanced type magnetic nanometer water treatment agent and preparation method and application thereof
  • Group enhanced type magnetic nanometer water treatment agent and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Accurately weigh 3 g of ferric chloride hexahydrate and 7.5 g of anhydrous sodium acetate powder, and add 75 ml of ethylene glycol solution, stir vigorously at normal temperature until completely dissolved; then add 0.5 g of polyethylene glycol (Mw = 10000) stirred for 2 hours until the system was uniformly dispersed;

[0036] (2) Pour the solution obtained by stirring in step (1) into a titanium-zirconium alloy high-pressure reactor container and react for 8 hours to obtain a reaction product, and the reaction temperature is 200° C.;

[0037] (3) Magnetically absorb the reaction product obtained in step (2), wash the reaction product 5 times with ethanol and deionized water, and place it in a freeze dryer to dry for 10 hours at a drying temperature of 60°C and a vacuum degree of Less than 1000Pa; get Fe 3 o 4 magnetic nanoparticles;

[0038] (4) Magnetic Fe obtained in step (3) 3 o 4 Add 500ml of ethanol aqueous solution with a volume concentration of 75% to t...

Embodiment 2

[0042] (1) Accurately weigh 3 g of ferric chloride hexahydrate and 9 g of anhydrous sodium acetate powder, add 75 ml of ethylene glycol solution, stir vigorously at normal temperature until completely dissolved; then add 0.5 g of polyethylene glycol (Mw=10000 ) stirred for 2 hours until the system was uniformly dispersed;

[0043] (2) Pour the solution obtained by stirring in step (1) into a titanium-zirconium alloy high-pressure reactor container and react for 7 hours to obtain a reaction product, and the reaction temperature is 200° C.;

[0044] (3) Magnetically absorb the reaction product obtained in step (2), wash the reaction product 5 times with ethanol and deionized water, and then place it in a freeze dryer to dry for 10 hours at a drying temperature of 70°C and a vacuum degree of Less than 1000Pa; get magnetic Fe 3 o 4 nanoparticles;

[0045] (4) Fe obtained in step (3) 3 o 4 Add 500ml of ethanol aqueous solution with a volume concentration of 70% to the magnetic...

Embodiment 3

[0049] (1) Accurately weigh 3 g of ferric chloride hexahydrate and 6 g of anhydrous sodium acetate powder, add 75 ml of ethylene glycol solution, stir vigorously at normal temperature until completely dissolved; then add 0.5 g of polyethylene glycol (Mw=10000 ) stirred for 2 hours until the system was uniformly dispersed;

[0050] (2) Pour the solution obtained by stirring in step (1) into a titanium-zirconium alloy high-pressure reactor container and react for 9 hours to obtain a reaction product, and the reaction temperature is 200° C.;

[0051] (3) Magnetically absorb the reaction product obtained in step (2), wash the reaction product 5 times with ethanol and deionized water, and then place it in a freeze dryer to dry for 10 hours at a drying temperature of 80°C and a vacuum degree of Less than 1000Pa; get magnetic Fe 3 o 4 nanoparticles;

[0052] (4) Fe obtained in step (3) 3 o 4 Add 500ml of ethanol aqueous solution with a volume concentration of 80% to the magnetic...

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Abstract

The invention discloses a group enhanced type magnetic nanometer water treatment agent and a preparation method and application thereof. The preparation method is characterized by comprising the following steps: accurately weighting hexahydrate ferric chloride and anhydrous sodium acetate as reaction raw materials; firstly, dissolving the raw materials into ethylene glycol; then, adding polyethylene glycol to disperse; adding solution into a high-pressure reaction reactor container to react; carrying out magnetic adsorption to obtain Fe3O4 magnetic nanoparticles; taking ethyl orthosilicate as a silicon source to enable silicon dioxide to cover the surface of the Fe3O4 magnetic nanoparticles; taking silane coupling agent as an amino source to graft an -NH2 group to the surface of the silane coupling agent to obtain Fe3O4@SiO2-NH2 magnetic nanoparticles; finally, under a constant temperature, stirring to modify the amino and sulfydryl group of cysteine on the surfaces of the Fe3O4@SiO2-NH2 magnetic nanoparticles to obtain group-enhanced magnetic nanometer water treatment agent Fe3O4-SiO2-NH2-L-Cys. The preparation method has the advantages of simpleness in preparation process operation and easiness in realizing reaction conditions. In addition, the group enhanced type magnetic nanoparticles prepared with the preparation method has the advantages of narrow particle size distribution, good stability, good adsorption function for various heavy metal ions and high adsorption efficiency.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a group-enhanced magnetic nanometer water treatment agent and its preparation method and application. Background technique [0002] With the rapid development of modern industry, the problem of environmental pollution is becoming more and more serious. Among them, heavy metal pollution has brought serious threats to the growth and reproduction of animals and plants, as well as human health and living environment. Therefore, effective and environmentally friendly treatment of heavy metal wastewater is now required. And low-cost disposal is an important task in the field of environmental protection. At present, the treatment methods of heavy metal wastewater mainly include biological methods, chemical methods and physical methods; biological methods are still in the development stage due to low adsorption efficiency; chemical methods have high efficiency, but co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/06B01J20/103B01J20/22B01J20/28009C02F1/281C02F1/285C02F2101/20
Inventor 郑怀礼王照福李嘉琳陈新郑超凡赵博刘冰枝高宝玉王毅力
Owner CHONGQING UNIV
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