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Ionic imprinting material for enriching ultratrace methyl mercury in water body

A technology of ion imprinting and methylmercury, which is applied in the field of ion imprinting materials and its preparation, can solve the problems of poor selectivity and inability to use enrichment and separation, and achieve the effects of low cost, fast enrichment speed and large enrichment capacity

Inactive Publication Date: 2015-02-18
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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.

Method used

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  • Ionic imprinting material for enriching ultratrace methyl mercury in water body
  • Ionic imprinting material for enriching ultratrace methyl mercury in water body
  • Ionic imprinting material for enriching ultratrace methyl mercury in water body

Examples

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Embodiment 1

[0026] A method for preparing silica microspheres with three-dimensional hole ion imprinted polymers with a methylmercury ion structure on the surface. Concrete steps:

[0027] (1) The surface of silica microspheres was modified by hydrolysis to prepare SiO 2 - γ-MAPS (3-(methacryloyloxy)propyltrimethoxysilane) microspheres;

[0028] (a) 3 g of SiO with a diameter of 40-60 μm 2 The microspheres were heat-treated at 550°C for 5 hours, after natural cooling, 72 ml of 1M hydrochloric acid solution was added, stirred and reacted in an oil bath at 80°C for 12 hours, washed with secondary water, centrifuged, and vacuum-dried at 60°C;

[0029] (b) Weigh 2 g of SiO dried in step (a) 2 Microspheres, add 5 ml of water, 30 ml of ethanol and 5 ml of 3-(methacryloyloxy)propyltrimethoxysilane (γ-MAPS) mixed solution, stir for 30min under nitrogen protection, and finally place at 60°C Heated and stirred in an oil bath for 24 hours;

[0030] (c) Vacuum drying at 60 °C after centrifugation...

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Abstract

The invention discloses an ionic imprinting material for enriching ultratrace methyl mercury in a water body and a preparation method and application of the ionic imprinting material. A silicon dioxide microsphere serving as a carrier, methyl mercury chloride and pyrrolidinecarbodith which serve as templates, methacrylic acid serving as a functional monomer, TMPTMA serving as a crosslinking agent and azodiisobutyronitrile serving as an initiator are synthesized to form a silicon dioxide microsphere, on the surface of which a three-dimensional cavity ionic imprinting polymer with a methyl mercury ion structure is arranged. The ionic imprinting material has the advantages of short enrichment time, simplicity in operation, high specificity, high enrichment capacity, low cost and the like and can be used for quickly pre-enriching and separating ultratrace methyl mercury ions in various water samples.

Description

technical field [0001] The invention belongs to the technical field of water environment detection, and in particular relates to an ion-imprinted material for enriching ultra-trace methylmercury in water, 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 ...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62
CPCB01J20/268B01J2220/4812C02F1/285C02F2101/30
Inventor 付凤富吴伟华
Owner FUZHOU UNIV
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