Cerium-manganese composite adsorbent with magnetic core-shell structure, and preparation method of cerium-manganese composite adsorbent

Abstract

The invention discloses a cerium-manganese composite adsorbent with a magnetic core-shell structure, and a preparation method of the cerium-manganese composite adsorbent. Specifically, the cerium-manganese composite adsorbent is a microsphere adsorbent having an inner core and an outer shell, wherein the inner core is formed by magnetic nanoparticles and has a particle size of 150-450nm, and the outer shell is prepared from a lanthanum manganese composite oxide and has a thickness of 50-80nm. By matching the particle size of the inner core formed by the magnetic nanoparticles with the thickness of the outer shell prepared from the lanthanum manganese composite oxide, the cerium-manganese composite adsorbent with the magnetic core-shell structure can effectively exert the absorption effectof the magnetic inner core and reinforce the absorption of a cerium-manganese composite oxide on phosphorus and the like in an assisted way, so that the absorption effect of phosphorus wastewater is significantly improved, and the phosphorous removal rate is increased.

Description

technical field [0001] The invention relates to the technical field of adsorbents, in particular to a cerium-manganese composite adsorbent with a magnetic core-shell structure and a preparation method thereof. Background technique [0002] With the continuous increase of human activities, a large amount of phosphorus-containing wastewater is discharged into the water body, resulting in an increase in the concentration of phosphorus in the water body, and the degree of eutrophication in the water body is becoming increasingly serious. In order to effectively control the phosphorus content in water bodies and prevent water eutrophication, people pay more and more attention to the removal of phosphorus in sewage generated by human activities. Phosphorus removal methods mainly include ion exchange method, membrane separation method, microbial method, constructed wetland method, adsorption method and crystallization method. Among them, the adsorption method has the advantages of...

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Problems solved by technology

[0003] Existing adsorbents for the purification of phosphorus-containing wastewater, such as iron oxide, ceria, iron-zirconium magnetic oxide, etc., but these adsorbents still have some problems, such as the adsorption efficiency still cannot meet the reduction of phosphorus concentration in water, and The preparation efficiency is low, and the phosphorus removal efficiency is low, resulting in an increase in the dosage of adsorbent, thereby increasing the treatment cost of phosphorus-containing wastewater, etc.