Preparation method of phosphate adsorbent with high adsorption selectivity

Abstract

The invention discloses a preparation method of a phosphate adsorbent with high adsorption selectivity, which specifically comprises the following steps: (1) ultrasonically dispersing modified attapulgite in water to obtain an attapulgite suspension; (2) adding humic acid and zirconium dioxide into the attapulgite suspension, stirring to obtain a mixed material, heating the mixed material in a water bath, and drying and sieving the heated mixture to obtain a mixture A; (3) adding polyhydroxyalkanoate into a volatile organic solvent, stirring until the polyhydroxyalkanoate is completely dissolved in the organic solvent, then adding the mixture A in the step (2) into the organic solvent, and continuously stirring until the mixture A is completely dispersed in the solvent; and (4) when the solution is in a semi-solid state, extruding the solution into a plurality of granular materials, and after the volatile organic solvent in the granular materials is completely volatilized, cleaning anddrying the granular materials to obtain the phosphate adsorbent. The phosphate adsorbent disclosed by the invention has high adsorption selectivity on phosphate.

Description

technical field

[0001] The invention relates to a preparation method of a phosphate adsorbent, in particular to a preparation method of a highly selective phosphate adsorbent. Background technique

[0002] Eutrophication of water body refers to the phenomenon that the excessive input of nutrients in the water body causes the wild growth of algae and other species, resulting in the imbalance of water ecology and the destruction of water quality. With the development of economy and society, environmental pollution is increasing day by day, and the phenomenon of eutrophication in water body is especially obvious. According to reports, nearly 75% of my country's water bodies of all levels and types have varying degrees of eutrophication, resulting in the loss of water body functions of a large number of surface water bodies, frequent occurrence of red tides in coastal waters, and even groundwater in some areas have been polluted to varying degrees. Studies have shown that exces...

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