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

A core-shell structure and composite material technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problem of increasing the cost of phosphorus-containing wastewater treatment, increasing the dosage of adsorbents, and failing to meet the adsorption efficiency. and other problems to achieve the effect of improving stability and adsorption effect, improving generation efficiency and uniformity, and shortening aging time

Pending Publication Date: 2019-10-01
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A cerium-manganese composite adsorbent with a magnetic core-shell structure. The adsorbent is specifically a microsphere adsorbent with an inner core and an outer shell. The inner core is magnetic nanoparticles with a particle size of 150nm. The thickness is 50nm; through the coordination of the core particle size of the magnetic nanoparticles and the thickness of the cerium-manganese composite oxide shell, the cerium-manganese composite adsorbent prepared by the magnetic core-shell structure can effectively exert the adsorption effect of the magnetic core and assist in enhancing the cerium manganese composite oxide. Adsorption of manganese composite oxides on phosphorus, etc.;

[0025] Among them, the cerium-manganese composite oxide is specifically: select Ce according to the mass ratio of 16:11 2 (S0 4 ) 3 ·8H 2 0 and KMn0 4 , respectively using 500ml deionized water to prepare Ce 2 (S0 4 ) 3 ·8H 2 0 solution, KMnO 4 solution, ready for use; to KMnO 4 Add 23m...

Embodiment 2

[0033] A cerium-manganese composite adsorbent with a magnetic core-shell structure. The adsorbent is specifically a microsphere adsorbent with an inner core and an outer shell. The inner core is magnetic nanoparticles with a particle size of 320nm. The thickness is 80nm; through the coordination of the core particle size of the magnetic nanoparticles and the thickness of the cerium-manganese composite oxide shell, the cerium-manganese composite adsorbent prepared by the magnetic core-shell structure can effectively exert the adsorption effect of the magnetic core and assist in enhancing the cerium manganese composite material. Adsorption of manganese composite oxides on phosphorus, etc.;

[0034] Among them, the cerium-manganese composite oxide is specifically: select Ce according to the mass ratio of 16:11 2 (S0 4 ) 3 ·8H 2 0 and KMn0 4 , respectively using 500ml deionized water to prepare Ce 2 (S0 4 ) 3 ·8H 2 0 solution, KMnO 4 solution, ready for use; to KMnO 4 Ad...

Embodiment 3

[0042] A cerium-manganese composite adsorbent with a magnetic core-shell structure. The adsorbent is specifically a microsphere adsorbent with an inner core and an outer shell. The inner core is magnetic nanoparticles with a particle size of 450nm. The thickness is 80nm; through the coordination of the core particle size of the magnetic nanoparticles and the thickness of the cerium-manganese composite oxide shell, the cerium-manganese composite adsorbent prepared by the magnetic core-shell structure can effectively exert the adsorption effect of the magnetic core and assist in enhancing the cerium manganese composite material. Adsorption of manganese composite oxides on phosphorus, etc.;

[0043] Among them, the cerium-manganese composite oxide is specifically: select Ce according to the mass ratio of 16:11 2 (S0 4 ) 3 ·8H 2 0 and KMn0 4 , respectively using 500ml deionized water to prepare Ce 2 (S0 4 ) 3 ·8H 2 0 solution, KMnO 4 solution, ready for use; to KMnO 4 Ad...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/28C02F1/28B01J20/30C02F101/10
CPCB01J20/0225B01J20/0229B01J20/0248B01J20/06B01J20/28009C02F1/281C02F2101/105
Inventor 王圣武齐剑英范芳
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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