Nano solid magnetic ion exchange resin ball and method for preparing same

A magnetic ion and exchange resin technology, applied in the direction of cation exchange materials, can solve the problems of low adsorption capacity and long adsorption time, and achieve the effects of improved adsorption rate and efficiency, simple operation, and easy control of application and recovery.

Inactive Publication Date: 2005-11-23
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, in the practical application of general ion exchange resins, due to the existence of internal diffusion resistance, the adsorption time is longer and the adsorption capacity is relatively low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] a).Nano Fe 3 o 4 The preparation process is: using NH 3 ·H 2 O as a precipitant, first configure a certain amount of FeCl 3 and FeCl 2 mixed solution, and then the NH 3 ·H 2 O was added to the above solution, where Fe 2+ : Fe 3+ :OH - The molar ratio of ion concentration is 1:2:12, vigorously stirred, and kept at constant temperature in a water bath of 30°C. During the reaction, the pH value was controlled at 10. After the mixture gradually turned from orange red to black, the reaction was terminated after stirring for another 15 minutes. The precipitate was heated at 80° C. for 30 minutes, centrifuged, and washed several times with deionized water and ethanol solution. The supernatant liquid was removed, and the product was dried in a vacuum electric furnace at a temperature of 70° C. for 24 hours, and then ground to obtain nanometer magnetic ferric oxide particles.

[0018] b). Preparation of buffer solution: the solution contains 0.003mol / L of Na 3 PO 4 ...

Embodiment 2

[0022] a).Nano Fe 3 o 4 Preparation: with NH 3 ·H 2 O is a precipitant, adding FeCl 3 and FeCl 2 The mixed solution, ion molar ratio: Fe 2+ : Fe 3+ :OH - 1:1:10; at 20°C, stir vigorously at constant temperature for 25 minutes. During the reaction, the pH value was controlled at 9. The precipitate is separated by centrifugation, dried at a constant temperature of 65°C, and ground to obtain nano-magnetic ferric oxide particles.

[0023] b). The preparation of the buffer solution: the buffer solution is composed of Na 3 PO 4 Mixed with NaCl. Na in buffer solution 3 PO 4 The concentration of NaCl is 0.002mol / L, and the concentration of NaCl is 0.05mol / L. The pH of the buffer solution is 5.5.

[0024] C). Preparation of covalent bond type polyacrylic acid magnetic ion exchange resin: in every liter of buffer solution, add 32g of previously prepared Fe 3 o 4 powder, and then quantitatively add carbodiimide solution at 0.0lg / ml. At a constant temperature of 0°C, rea...

Embodiment 3

[0026] a).Nano Fe 3 o4 Preparation: with NH 3 ·H 2 O is a precipitant, adding FeCl 3 and FeCl 2 The mixed solution, ion molar ratio: Fe 2+ : Fe 3+ :OH - The ratio is 1:3:15; at 45°C, stir vigorously at constant temperature for 35 minutes. During the reaction, the pH value was controlled at 11. The precipitate is separated by centrifugation, dried at a constant temperature of 75°C, and ground to obtain nano-magnetic ferric oxide particles.

[0027] b). The preparation of the buffer solution: the buffer solution is composed of Na 3 PO 4 Mixed with NaCl. Na in buffer solution 3 PO 4 The concentration of NaCl is 0.004mol / L, and the concentration of NaCl is 0.15mol / L. The pH of the buffer solution is 6.5.

[0028] c). Preparation of covalent bond type polyacrylic acid magnetic ion exchange resin: in every liter of buffer solution, add 16g of previously prepared Fe 3 o 4 powder, and then quantitatively add carbodiimide solution at 0.03g / ml. At a constant temperature...

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Abstract

The invention relates to a nano solid magnetic ion exchange resin ball and method for preparation, wherein the solid core is ferriferrous oxide nano particles, a layer of ion exchange resin particles is coated outside. The preparation comprises using ammonia as precipitation reagent, employing chemical co-precipitation method to prepare ammonia-containing functional groups on the Fe3O4 surface, under the activating action of carbodiimide, forming magnetic ion exchange resin of covalent bonds with polyacrylic acid.

Description

technical field [0001] The invention relates to a novel magnetic microsphere and a preparation method for treating dye wastewater, in particular to a nanoscale solid magnetic ion exchange resin ball and a preparation method. Background technique [0002] The nano-iron oxide-polymer composite material is a composite material formed by dispersing iron oxide nanoparticles in a polymer matrix. Iron oxides including α-Fe 2 o 3 , γ-Fe 2 o 3 and Fe 3 o 4 As a magnetic raw material, it has attracted much attention in both industrial production and scientific research. The preparation of magnetic iron oxide nanoparticles with special properties has aroused great interest and widespread concern of researchers. In recent years, iron oxide nanoparticles have been widely used to prepare magnetic composite materials. Because nano-iron oxide-polymer composites combine the advantages of polymers and magnetic nano-iron oxides, and have both magnetic responsive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/20
Inventor 姜斌李鑫钢张鑫徐世民许长春刘涉江
Owner TIANJIN UNIV
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