Magnetic microsphere capable of absorbing cadmium ions and complexes thereof, as well as preparation method, application method and regeneration method of magnetic microsphere

A technology of magnetic microspheres and complexes, which is applied in separation methods, filter regeneration, alkali metal compounds, etc., can solve the problem that the adsorption capacity of cadmium ions is difficult to meet the expected requirements, and the regeneration cycle capacity of ferric tetroxide magnetic adsorption materials is poor. Cumbersome operation and other problems, to achieve the effect of rich carboxyl group content, beneficial adsorption efficiency, and simplified preparation process

Active Publication Date: 2016-05-04
国网湖南环保有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

There are also many methods for modifying the ferroferric oxide magnetic adsorption material to treat cadmium wastewater, but the traditional method for modifying the ferroferric oxide magnetic adsorption material has long process flow, cumbersome operation, large material loss, and high cost. Moreover, the adsorption capacity of the modified ferroferric oxide magnetic adsorption material to cadmium ions is also difficult to meet the expected requirements, and the regeneration cycle ability of the modified ferric iron tetroxide magnetic adsorption material is also poor.

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  • Magnetic microsphere capable of absorbing cadmium ions and complexes thereof, as well as preparation method, application method and regeneration method of magnetic microsphere
  • Magnetic microsphere capable of absorbing cadmium ions and complexes thereof, as well as preparation method, application method and regeneration method of magnetic microsphere
  • Magnetic microsphere capable of absorbing cadmium ions and complexes thereof, as well as preparation method, application method and regeneration method of magnetic microsphere

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Effect test

Embodiment 1

[0034] A magnetic microsphere adsorbed by cadmium ions and their complexes of the present invention, with magnetic nano-ferric oxide particles as the core, coated with polyacrylic acid on the surface of the magnetic nanoparticles to form a ferric oxide / polyacrylic acid composite material, The surface of the ferroferric oxide / polyacrylic acid composite material is grafted with 4-phenyl-3-thiosemicarbazide; the average particle size of the magnetic microspheres is about 100nm, and the specific surface area is about 120m 2 / g.

[0035] The preparation method of the magnetic microspheres adsorbed by cadmium ions and their complexes of the present embodiment comprises the following steps:

[0036] (1) Dissolve iron acetylacetonate in ethylene glycol so that the concentration of ferric ion is 0.1mol / L, then add sodium acrylate, sodium acetate, and ethylenediamine solution (ethylenediamine The volume of the solution is 5% of the whole solution volume), mixed and stirred to obtain a ...

Embodiment 2

[0041] A magnetic microsphere adsorbed by cadmium ions and their complexes of the present invention, with magnetic nano-ferric oxide particles as the core, coated with polyacrylic acid on the surface of the magnetic nanoparticles to form a ferric oxide / polyacrylic acid composite material, The surface of the ferroferric oxide / polyacrylic acid composite material is grafted with 4-phenyl-3-thiosemicarbazide; the particle size of the magnetic microspheres is about 400nm, and the specific surface area is about 80m 2 / g.

[0042] The preparation method of the magnetic microspheres adsorbed by cadmium ions and their complexes of the present embodiment comprises the following steps:

[0043] (1) Dissolve ferric chloride in ethylene glycol so that the concentration of ferric ions is 0.1mol / L, and then add sodium acrylate, sodium acetate, and ethylenediamine solution (ethylenediamine) with a mass ratio of 1:2 in sequence. The volume of the amine solution is 2% of the total solution vol...

Embodiment 3

[0049] A magnetic microsphere adsorbed by cadmium ions and their complexes of the present invention, with magnetic nano-ferric oxide particles as the core, coated with polyacrylic acid on the surface of the magnetic nanoparticles to form a ferric oxide / polyacrylic acid composite material, The surface of the ferroferric oxide / polyacrylic acid composite material is grafted with 4-phenyl-3-thiosemicarbazide; the particle size of the magnetic microspheres is about 150nm, and the specific surface area is about 108cm 3 / g.

[0050] The preparation method of the magnetic microspheres adsorbed by cadmium ions and their complexes of the present embodiment comprises the following steps:

[0051] (1) Dissolve ferric chloride hexahydrate in ethylene glycol so that the concentration of ferric ion is 0.1mol / L, then add sodium acrylate, sodium acetate, and ethylenediamine solution with a mass ratio of 2:1 in sequence ( The volume of the ethylenediamine solution is 5% of the whole solution v...

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Abstract

The invention discloses a magnetic microsphere capable of absorbing cadmium ions and complexes thereof. The surface of a ferroferric oxide / polyacrylic acid composite material is grafted with 4-phenyl-3-thiosemicarbazide, and the ferroferric oxide / polyacrylic acid composite material is of a composite structure which utilizes magnetic nano ferroferric oxide particles as a core and has polyacrylic acid wrapping the surface of the core. The preparation method comprises the following steps: firstly preparing the ferroferric oxide / polyacrylic acid composite material, then performing activating treatment on the ferroferric oxide / polyacrylic acid composite material, and finally grafting 4-phenyl-3-thiosemicarbazide on the surface of the ferroferric oxide / polyacrylic acid composite material, thereby obtaining the magnetic microsphere. The magnetic microsphere disclosed by the invention is capable of effectively absorbing cadmium ions and complexes thereof in industrial wastewater, achieves a removal rate greater than or equal to 95%, and has a cadmium adsorption amount greater than or equal to 175.2mg / g. According to the preparation method, the ferroferric oxide / polyacrylic acid composite material is synthesized by one step, so that the preparation process is simplified.

Description

technical field [0001] The invention relates to the field of modified adsorption materials, in particular to a magnetic microsphere used for the adsorption of cadmium ions and their complexes in industrial waste water and a preparation method, application and regeneration method thereof. Background technique [0002] With the development of industry, heavy metal wastewater, especially cadmium-containing wastewater, has become an important source of environmental pollution. Cadmium-containing wastewater mainly comes from electroplating, mining, pigments, alloys and other industries. Cadmium ions and their complexes entering the ecological environment are easily enriched through the food chain, posing a serious threat to organisms and human health, and even endangering the entire ecosystem. The "cadmium rice incident" in recent years has aroused public panic about cadmium, and everyone "disguises when talking about cadmium". Cadmium in the water directly or indirectly enters ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30B01J20/34C02F1/28C02F101/20
CPCB01J20/265B01J20/28009B01J20/28021B01J20/3425B01J20/3441B01J20/3475C02F1/285C02F2101/20
Inventor 田庆华王晓阳郭学益李栋
Owner 国网湖南环保有限公司
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