Ionic imprinting material for enriching ultratrace methyl mercury in water body

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 ...

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