Modified magnetic alumina absorbent, preparation method for modified magnetic alumina absorbent and application of modified magnetic alumina absorbent

A magnetic alumina, adsorbent technology, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal oxides/hydroxides, etc. The effect of utilization, increased specific surface area, and rough surface

Active Publication Date: 2017-10-24
HUNAN HENGKAI ENVIRONMENT TECH INVESTMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, many reported documents and patents only focus on phosphate, and seldom mention total phosphorus. How to effectively improve phosphorus removal efficiency is an important technical problem faced by those skilled in the art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation steps are as follows:

[0038] (1) Preparation of Fe 3 o 4 nanoparticles

[0039] (1.1) Weigh 2.7g FeCl 3 ·6H 2 O and 4.1 g NaAc 3H 2 O was dissolved in 80mL of ethylene glycol, stirred thoroughly to dissolve, and a mixed solution was obtained.

[0040] (1.2) Put the mixed solution obtained in step (1.1) into a 100 mL hydrothermal reaction kettle, then heat it to 180° C. in an oven, keep it for 24 h, and then cool it down to room temperature.

[0041] (1.3) Pour the reaction product in the hydrothermal reaction kettle into a beaker, and through magnetic separation, pour off the supernatant, and the gained precipitate is washed 5 times with absolute ethanol, and then washed 5 times with distilled water, then magnetically separated, at 60 ℃ vacuum drying for 24h to obtain Fe 3 o 4 nanoparticles.

[0042] (2) Preparation of Fe 3 o 4 -SiO 2 carrier

[0043] (2.1) Fe in the 0.5g step (1) was mixed under ultrasonic condition 3 o 4 Nanoparticles ...

Embodiment 2

[0050] The application of the modified magnetic alumina adsorbent prepared in Example 1 in the preparation of phosphorus-containing solution (potassium dihydrogen phosphate) in the treatment laboratory comprises the following steps: the pH value of the waste water is controlled at 5, and the initial phosphate ( In terms of P), the concentration is 5.0 mg / L, the dosage of the adsorbent is 1.0 g / L, the adsorption temperature is 25° C., the reaction time is 30 min, and the phosphorus removal rate reaches 90.0%.

Embodiment 3

[0052] The application of the modified magnetic alumina adsorbent prepared in Example 1 in the preparation of phosphorus-containing solution (potassium dihydrogen phosphate) in the treatment laboratory comprises the following steps: the pH value of the waste water is controlled at 5, and the initial phosphate ( In terms of P), the concentration is 5.0 mg / L, the dosage of the adsorbent is 2.0 g / L, the adsorption temperature is 25° C., the reaction time is 30 min, and the phosphorus removal rate reaches 92.4%.

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PUM

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Abstract

The invention discloses a modified magnetic alumina absorbent, a preparation method for modified magnetic alumina absorbent and an application of modified magnetic alumina. Fe3O4 is the core of the modified magnetic alumina absorbent. The surface of Fe3O4 nanometer particles is covered with SiO2. The surface of SiO2 is covered with Al2O3. By modifying Al2(SO4)3, the modified magnetic alumina absorbent is produced. The preparation method of the modified magnetic alumina absorbent includes preparing Fe3O4-SiO2 and preparing modified magnetic Al2O3. The modified magnetic alumina absorbent can be applied to remove phosphorus of effluent sewage. The modified magnetic alumina absorbent has the advantages of being efficient in absorbing phosphate and all the phosphorus and being convenient in recycling and using.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a modified magnetic alumina adsorbent and a preparation method and application thereof. Background technique [0002] In recent years, with the rapid development of industry and agriculture, a large amount of wastewater containing nitrogen and phosphorus and domestic sewage have been discharged into rivers, lakes and seas, resulting in eutrophication of water bodies. Therefore, how to effectively remove phosphorus in wastewater is the key to eliminating eutrophication of rivers and lakes. Traditional phosphorus removal methods include biological methods, chemical precipitation methods, adsorption methods, and ion exchange methods. In the phosphorus removal process of various sewage (waste) water, the adsorption method has the advantages of good stability, simple operation, low cost, no secondary pollutants, and phosphorus recovery can be realized. [0003] Activated al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/28B01J20/30C02F1/28C02F1/52C02F101/10
CPCB01J20/0248B01J20/28009C02F1/281C02F1/5245C02F2101/105
Inventor 罗琨贺治国罗文连李晶
Owner HUNAN HENGKAI ENVIRONMENT TECH INVESTMENT CO LTD
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