Magnetic composite oxides preparation method and use of magnetic composite oxides as anionic pollutant absorbent

A technology of anionic pollutants and composite oxides, applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve problems such as waste of energy, achieve shortened reaction cycles, easy transfer and transportation, and easy regeneration and the effect of recycling

Inactive Publication Date: 2009-05-06
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can separate the adsorption products well, they will waste a lot of energy in practical application.

Method used

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  • Magnetic composite oxides preparation method and use of magnetic composite oxides as anionic pollutant absorbent
  • Magnetic composite oxides preparation method and use of magnetic composite oxides as anionic pollutant absorbent
  • Magnetic composite oxides preparation method and use of magnetic composite oxides as anionic pollutant absorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] n(FeSO 4 ·7H 2 O):n(Fe 2 (SO 4 ) 3 ·XH 2 (0)=1:2 prepare 100mL aqueous solution, add this solution into a 500mL three-necked flask, control the temperature to (338±5)K, under vigorous stirring, add dropwise a volume fraction of 20% ammonia water until the pH is 10±5 1. Keep the temperature and age for 10-120 minutes after dropping, use a magnetic field to pull and pour off the supernatant, and the remaining substances are washed repeatedly with distilled water until neutral, and then set aside.

[0019] At room temperature, a certain amount of Mg(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O is prepared into 300mL of nitrate aqueous solution, and another certain amount of NaOH and Na 2 CO 3 Prepared into 300mL alkali solution, where n(OH-) / [n(Mg 2+ )+n(Al 3+ )]=2.2, n(CO 3 2- ) / [n(Mg 2+ )+n(Al 3+ )]=0.667. Add the above-mentioned lye and salt solution into a 1000mL three-necked bottle with a certain volume of magnetic medium at the same time at a constant r...

Embodiment 2

[0022] Change Mg(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 The molar ratio of O and other experimental conditions are the same as in Example 1, and hydrotalcite materials with different Mg / Al molar ratios can be prepared.

Embodiment 3

[0024] Change the volume of the magnetic medium added to 5mL, 10mL, 20mL, 50mL, and 100mL to obtain hydrotalcites with different magnetic strengths. According to different Mg 2+ / Fe 2+ Than define hydrotalcite as LDH-X and calcined hydrotalcite as CLDH-X. where X is Mg 2+ / Fe 2+ Compare.

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PUM

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Abstract

The invention provides a preparation method of a magnetic composite oxide and the application of the oxide for serving as an adsorbent of negative ion pollutants. FeSO4 question mark 7H2O and Fe2(SO4)3 question mark XH2O are used for preparing a magnetic medium; an alkali liquor that is prepared by the magnetic medium, divalent metal ions, trivalent metal ions, NaOH and Na2CO3 is prepared into a magnetic houghite precursor; and the magnetic houghite precursor is baked to obtain a baked magnetic composite oxide. The baking product of the magnetic houghite precursor that is obtained by the preparation method is used for absorbing the negative ion pollutants in water bodies, has higher absorbing capacity, and can be easily separated and recycled after adsorption.

Description

(1) Technical field [0001] The invention relates to a preparation method of a magnetic composite oxide, and also relates to the application of the magnetic composite oxide as an anion pollutant adsorbent. (2) Background technology [0002] Magnetic materials are a class of important functional materials that are widely used and have a variety of varieties, and have developed rapidly since the 1990s, but few people use them in water treatment adsorbents. The special structure of composite oxides, such as calcined hydrotalcite materials (LDHs), endows them with diverse physical and chemical properties, making them useful in catalysis, intercalation, slow-release drugs, electrorheological materials, flame retardancy, sewage treatment, functional luminescent materials and Fields such as semiconductors show broad application prospects. In addition, the special layered structure of hydrotalcite shows potential advantages in the adsorption of water polluted by heavy metal ions. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/30C02F1/28
Inventor 王君李松南仲崇娜李占双景晓燕张密林
Owner HARBIN ENG UNIV
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