Composite magnetic nanometer catalytic material for water treatment as well as preparation and application thereof

A nano-catalytic material and composite nano-material technology, applied in water/sewage treatment, special compound water treatment, light water/sewage treatment, etc., can solve the problems of easy loss, difficult recycling and reuse, difficult collection and high energy consumption , to achieve the effects of stable properties, high comprehensive development and utilization value, and strong reactivity

Active Publication Date: 2018-10-30
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small size of ordinary nano-magnesium hydroxide materials, it is difficult to collect and consume a lot of energy after preparation. At the same time, it is easy to lose during use and difficult to recycle and reuse.
However, there is no report on loading nano-magnesium hydroxide on the surface of magnetic particles to form a core-shell structure magnetized nano-water purification material and applying it to catalytic advanced oxidation technology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of a composite magnetic nano-catalytic material for water treatment and its application in catalytic ozone oxidation to remove metronidazole in water. Specific steps are as follows:

[0028] (1) Magnetic Fe 3 o 4 Synthesis of nanoparticles: the ferrous salt (FeSO 4 ·7H 2 O) and ferric salt (FeCl 3 ·6H 2 O) Mix evenly in a ratio of 1:2 by mass, add polyethylene glycol at a final concentration of 2.0%, sodium gluconate at a final concentration of 0.1%, and ammonium citrate at a final concentration of 1.0%, and the mixed solution is placed in a three-necked flask , control the total iron concentration to 0.05mol / L, keep the temperature in the water bath at 50°C, add NH dropwise while stirring 3 ·H 2 O, adjust the pH of the reaction system to pH ≥ 10.0, and react for 2 hours. After the reaction, the distilled water was washed repeatedly until neutral, and the magnetic Fe was collected by magnetic force. 3 o 4 Nanoparticles, dry for later use.

[0029] (...

Embodiment 2

[0033] Preparation of a composite magnetic nano-catalytic material for water treatment and its application in catalytic Fenton-like oxidation to remove nitrophenol and bisphenol A from water. Specific steps are as follows:

[0034] (1) Magnetic Fe 3 o 4 Synthesis of nanoparticles: the ferrous salt (FeSO 4 ·7H 2 O) and ferric salt (FeCl 3 ·6H 2 O) Mix evenly in a ratio of 1:2 by mass, add polyethylene glycol at a final concentration of 2.5%, sodium gluconate at a final concentration of 0.2%, and ammonium citrate at a final concentration of 2.0%, and the mixed solution is placed in a three-necked flask , control the total iron concentration to 0.10mol / L, keep the water bath at a constant temperature of 50°C, add NaOH solution dropwise while stirring until the pH of the reaction system is adjusted to pH ≥ 10.0, and react for 1h. After the reaction, the distilled water was washed repeatedly until neutral, and the magnetic Fe was collected by magnetic force. 3 o 4 Nanoparti...

Embodiment 3

[0039] Preparation of a composite magnetic nano-catalytic material for water treatment and its application in further catalytic photocatalytic oxidation to remove estradiol in water. Specific steps are as follows:

[0040] (1) Magnetic Fe 3 o 4 Synthesis of nanoparticles: the ferrous salt (FeSO 4 ·7H 2 O) and ferric salt (FeCl 3 ·6H 2 O) Mix evenly in a ratio of 1:2 by mass, add polyethylene glycol at a final concentration of 2.0%, sodium gluconate at a final concentration of 0.1%, and ammonium citrate at a final concentration of 2.0%, and the mixed solution is placed in a three-necked flask , control the total iron concentration to 0.10mol / L, keep the water bath at a constant temperature of 50°C, add NaOH solution dropwise while stirring until the pH of the reaction system is adjusted to pH ≥ 10.0, and react for 1h. After the reaction, the distilled water was washed repeatedly until neutral, and the magnetic Fe was collected by magnetic force. 3 o 4 Nanoparticles, dry...

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PUM

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Abstract

The invention relates to the field of an environmental protection technology and a functional material technology, in particular to preparation and application of a composite magnetic nanometer catalytic material for water treatment to catalytic oxidation treatment of wastewater. The preparation comprises the following steps: firstly mixing divalent iron salt and trivalent iron salt according to acertain proportion, adding polyethylene glycol, sodium gluconate, ammonium citrate and the like as synthetic auxiliaries and preparing magnetic Fe3O4 nanoparticles under alkaline conditions; then treating the Fe3O4 nanoparticles with dilute acid and a cetyltrimethylammonium bromide (CTAB) solution, mixing with magnesium ions and preparing magnetic Mg(OH)2@Fe3O4 composite nanoparticles under lye conditioning; finally immersing the prepared composite magnetic nanometer material in an active metal ion solution, promoting to form a lattice defect active site ad further enhancing a catalytic oxidation effect. The composite magnetic nanometer catalytic material is stable in property, simple and easy in preparation process, and cheap and easily-available in raw materials, thereby being a multi-purpose environmentally-friendly material.

Description

technical field [0001] The invention relates to the technical fields of environmental protection technology and functional materials, in particular to a composite magnetic nano-catalyst material for water treatment, a preparation method thereof and an application in catalytic oxidation treatment of wastewater. Background technique [0002] With the progress of society and the rapid development of the national economy, various environmental pollutions have intensified. Among them, the abuse of water resources and the random discharge of sewage and wastewater have seriously endangered human health. Water environmental protection has aroused widespread concern in human society. Processing technology has also been continuously developed. In recent years, advanced oxidation technology (Advanced Oxidation Process, referred to as AOPs) has been continuously developed and widely used in the removal of refractory pollutants in water. AOPs produce hydroxyl radicals with strong oxidiz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/30C02F1/72C02F1/78C02F101/30
CPCB01J23/78B01J35/0033B01J35/004C02F1/30C02F1/722C02F1/725C02F1/78C02F2101/30C02F2305/026C02F2305/08C02F2305/10
Inventor 吕剑武君孙琪张宇轩
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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