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Method for preparing magnetic nanometer metal particle for degrading organic pollutant in waste water

A technology of organic pollutants and magnetic nanometers, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as iron-carbon bed compaction, reduced activity of nanoparticles, and difficulties in production and application , to achieve the effect of increasing the reaction speed, improving the degradation efficiency, and solving the easy hardening of fillers

Active Publication Date: 2011-05-18
溧阳常大技术转移中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the iron-carbon micro-electrolysis methods adopt the fixed iron-carbon bed process, which mainly has the following defects: after several months of operation, there will be iron mud clogging, which will cause the iron-carbon bed to harden, and the treatment effect will drop sharply.
However, due to the high surface energy of nanoparticles, nanoparticles are easy to agglomerate, which not only reduces the activity of nanoparticles, but also affects the performance of nanoparticles in all aspects.
In addition, the agglomeration of nanomaterials brings great inconvenience to the mixing, homogenization and packaging of nanomaterials, which becomes very difficult in actual production and application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] First, in a water bath at 50°C, with stirring, the Na 2 CO 3 The solution was added dropwise to NiCl 2 solution, where Na 2 CO 3 and NiCl 2 The ratio of the amount of substances is 1:3, when Na 2 CO 3 After adding the solution, continue to stir for 30 minutes, and age for 24 hours to obtain a nickel oxyhydroxide pillar solution; 3 Na was added dropwise to the solution 2 CO 3 solution, where Na 2 CO 3 and FeCl 3 The ratio of the amount of substance is 1:2, when Na 2 CO 3 After the solution is added, continue to stir for 30 minutes and age for 24 hours to obtain a hydroxy-iron pillar solution; then, in a 60°C water bath, under continuous stirring conditions, dropwise add the hydroxynickel pillar solution and hydroxyl iron to the suspension containing bentonite at the same time. Iron pillar solution, wherein the ratio of iron to nickel is about 1:0.6, aged at 60°C for 24 hours, centrifuged, washed with deionized water, and ground into 50-mesh powder; take the ...

Embodiment 2

[0014] First, in a water bath at 55°C, with stirring, Na 2 CO 3 The solution was added dropwise to NiCl 2 solution, where Na 2 CO 3 and NiCl 2 The ratio of the amount of substance is 1:5, when Na 2 CO 3 After adding the solution, continue to stir for 30 minutes, and age for 24 hours to obtain a nickel oxyhydroxide pillar solution; then in a 55°C water bath, under stirring conditions, 3 Na was added dropwise to the solution 2 CO 3 solution, where Na 2 CO 3 and FeCl 3 The ratio of the amount of substances is 1:3, when Na 2 CO 3 After the addition of the solution, continue to stir for 30 minutes, and age for 24 hours to obtain a hydroxy-iron pillar solution; then, in a water bath at 65°C, under continuous stirring conditions, dropwise add the hydroxynickel pillar solution and hydroxyl iron to the suspension containing bentonite at the same time Iron pillar solution, wherein the ratio of iron to nickel is about 1:1, aged at 60°C for 24 hours, centrifuged, washed with ...

Embodiment 3

[0017] First, in a water bath at 55°C, with stirring, Na 2 CO3 The solution was added dropwise to NiCl 2 solution, where Na 2 CO 3 and NiCl 2 The ratio of the amount of substances is 1:4, when Na 2 CO 3 After adding the solution, continue to stir for 30 minutes, and age for 24 hours to obtain a nickel oxyhydroxide pillar solution; then in a 55°C water bath, under stirring conditions, 3 Na was added dropwise to the solution 2 CO 3 solution, where Na 2 CO 3 and FeCl 3 The ratio of the amount of substances is 1:3, when Na 2 CO 3 After the addition of the solution, continue to stir for 30 minutes and age for 24 hours to obtain a hydroxyl iron pillar solution; then in a water bath at 63°C, under continuous stirring conditions, dropwise add nickel hydroxide pillar solution and hydroxyl iron to the suspension containing bentonite. Iron pillar solution, wherein the ratio of iron to nickel is about 1:1.5, aged at 60°C for 24 hours, centrifuged, washed with deionized water, ...

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Abstract

The invention discloses a method for preparing magnetic nanometer metal particles for degrading organic pollutants in waste water, comprising the following steps of: firstly, dropping an Na2CO3 solution to an NiCl2 solution to obtain a carbonyl nickel column support solution, wherein the ratio of the amount of substances of Na2CO3 to NiCl2 is 1:3-5; then dropping the Na2CO3 solution to an FeCl3 solution to obtain a carbonyl iron column support solution, wherein the ratio of the amount of substances of Na2CO3 to FeCl3 is 1:2-3; then simultaneously dropping the carbonyl nickle column support solution and the carbonyl iron column support solution to a suspension containing bentonite, wherein the ratio of the amount of substances of iron to nickel is 1:0.6-1.5, finally inletting N2 protectionand adding an ascorbic acid solution to react. The invention utilizes the magnetism of nickel to separate bentonite particles through a magnetic field, and thereby, the nanometer effect development of iron and nickel in the micro electrolytic process can be effectively ensured, thereby increasing the reaction speed and degrading efficiency, and the nanometer metal particles can be recycled.

Description

technical field [0001] The invention relates to the technical field of sewage treatment in environmental protection, in particular to a preparation method of magnetic nanometer metal particles used for degrading organic pollutants in waste water. Background technique [0002] In the treatment method of refractory industrial wastewater, the iron-carbon micro-electrolysis method has been applied in practice. The principle is to use the potential difference between iron-carbon particles to form countless micro-primary batteries in acidic wastewater. Among them, the iron with low potential becomes the anode, and the carbon with high potential becomes the cathode, and the electrochemical reaction occurs under acidic oxygenation conditions, and the nascent Fe produced in the reaction process 2+ And atomic H has high chemical activity, which can change the structure and characteristics of organic matter in wastewater, and cause chain breaking and ring opening of organic matter. Af...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24C02F1/461
Inventor 马建锋李定龙
Owner 溧阳常大技术转移中心有限公司
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