Methylmercury ion imprinted magnetic microsphere, and preparation method and application thereof

An ion imprinting, magnetic microsphere technology, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve the problems of low separation and enrichment efficiency, waste of preparations, poor selectivity, etc. The separation and enrichment speed is fast, the enrichment capacity is large, and the operation is simple.

Inactive Publication Date: 2015-09-23
FUZHOU UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

However, mercapto cotton can not only adsorb methylmercury, but also adsorb inorganic mercury and other organic mercury. The selectivity is poor, and it cannot be used for the enrichment and separation of ultra-trace methylmercury in water samples. At the same time, benzene extraction also causes organic benzene pollution.
In addition, the solid-phase extraction technology is time-consuming, and the efficiency of separation and enrichment is low. A large volume of eluent is required to elute the methylmercury adsorbed on the solid-phase separation column, which not only results in waste of preparations, but also requires liquid for further concentration

Method used

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  • Methylmercury ion imprinted magnetic microsphere, and preparation method and application thereof
  • Methylmercury ion imprinted magnetic microsphere, and preparation method and application thereof
  • Methylmercury ion imprinted magnetic microsphere, and preparation method and application thereof

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Embodiment Construction

[0020] A methylmercury ion-imprinted magnetic microsphere: an ion-imprinted polymer with three-dimensional holes in the physical structure of methylmercury ions on the surface of ferroferric oxide magnetic microspheres. The surface of the microspheres contains the following elements: 0.71 wt% nitrogen, 14.86 wt% carbon, 2.53 wt% hydrogen, and 0.3 wt% sulfur.

[0021] Preparation method: use iron ferric oxide-silica core-shell particles as media carrier, methylmercury chloride and ammonium pyrrolidine dithioformate as template, methacrylic acid as functional monomer, trimethylolpropane trimethylolpropane Methacrylate was used as cross-linking agent and azobisisobutyronitrile was used as initiator to synthesize ion-imprinted polymers with three-dimensional holes in the physical structure of methylmercury ions on the surface of ferric oxide-silica core-shell particles.

[0022] Specific steps are as follows:

[0023] (1) Preparation of ferroferromagnetic nanoparticles: 0.81gFeCl...

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Abstract

The invention discloses a methylmercury ion imprinted magnetic microsphere, and a preparation method and application thereof. The methylmercury ion imprinted magnetic microsphere is an ion imprinted polymer prepared by synthesizing methylmercury ion physical structure three-dimensional holes in the surface of a ferroferric oxide magnetic microsphere. According to the characteristics that the ion imprinted polymer with the methylmercury ion structure three-dimensional holes has high specific adsorption capacity to methylmercury ions, and ferroferric oxide magnetic microspheres can be quickly collected and separated through magnet, specific, rapid and high-expansion preconcentration and separation of ultra-trace methylmercury in water can be realized.

Description

technical field [0001] The invention belongs to the field of water body monitoring and purification, and in particular relates to a methylmercury ion imprinted magnetic microsphere and a preparation method and application thereof. Background technique [0002] Mercury is a highly toxic element, and all countries in the world have included mercury in the "priority list of hazardous substances". Mercury pollutants in the environment undergo biochemical transformations, resulting in speciation changes to more toxic organo-mercury compounds. For example, inorganic mercury in the aquatic environment includes Hg 0 , Hg 2+ and Hg 2 2+ undergoes a speciation change to form methylmercury (CH 3 Hg + ). Methylmercury is not only more toxic, but also has lipophilicity, which can be enriched in organisms to form biomagnification, and cause harm to human health through the food chain. Minamata disease, which occurred in Japan, is a comprehensive disease caused by eating seafood in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/14C08F220/06C08F2/44C08K9/06C08K3/22C08K3/36C08J9/28B01J20/26B01J20/28B01J20/30C02F1/28C02F101/30
Inventor 付凤富吴伟华
Owner FUZHOU UNIV
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