A cyclodextrin/sodium alginate gel ball composite adsorption material modified by amidoxime group and its preparation method and application

Abstract

The invention relates to a cyclodextrin / sodium alginate gel ball composite adsorption material modified by amidoxime group, which uses amidoximated diaminomaleonitrile, oxygen-containing functional groups of sodium alginate and cyclodextrin The combination of oxygen-containing functional groups, on the one hand, introduces amidoxime groups, increases the adsorption sites in the gel, and greatly enhances the selective adsorption capacity of the composite material for hexavalent uranium; on the other hand, sodium alginate and cyclodextrin enhance the The mechanical properties of the material, to obtain stronger mechanical properties, so that the material has good mechanical properties, can be reused many times, and is easy to separate from the water body, and also increases the adsorption sites in the composite airgel for the enrichment of six Valence uranium has high enrichment rate, short adsorption time, and is not affected by seawater salinity, so it can be reused many times, and it is easy to separate from water body, easy to recycle and recycle.

Description

technical field [0001] The invention relates to an amidoxime-modified cyclodextrin / sodium alginate gel ball composite adsorption material and a preparation method and application thereof, belonging to the technical fields of chemistry and environment. Background technique [0002] With the rapid development of the global economy, the demand for energy is increasing day by day. The limited availability of fossil fuels and the problems associated with their combustion have led to an increasing focus on sustainable clean energy. As one of the clean energy sources, nuclear energy has received extensive attention. With the gradual development of the nuclear industry, people's demand for uranium resources, its main raw material, is also gradually increasing. Existing uranium deposits on land are estimated to be only enough for human use for about one hundred years. There are about 4.5 billion tons of uranium in seawater, equivalent to a thousand times that of uranium mines on l...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, especially the poor uranium absorption ability and low mechanical strength of the existing composite materials, which cannot satisfy the problem of high-efficiency enrichment of uranium from seawater with high salinity, the present invention provides an amidoxime-modified Cyclodextrin / sodium alginate gel ball composite adsorption material and its preparation method and application

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