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Preparation method and application of copper and ferrous magnetic metal oxide modified fly ash phosphorus adsorbent

A magnetic metal and phosphorus adsorbent technology, applied in the direction of alkali metal oxides/hydroxides, alkali metal compounds, chemical instruments and methods, etc., can solve the problems of inconvenient use, achieve improved purification effect, simple process, The effect of increasing dispersion

Inactive Publication Date: 2012-02-15
ZHENGZHOU UNIVERSITY OF AERONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it can achieve a certain purpose of pollution control, it is not very convenient to use, and it needs to be weighed and placed on site.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 200ml of 1mol / L ferrous sulfate solution and 100ml of 1mol / L copper sulfate solution in a 1000ml beaker, heat to 70°C, add 23 g of fly ash, add NaOH to pH 11, ventilate for 20min and stir well, the reaction ends After that, it was left to stand for aging for 20 min, the precipitate was filtered out, washed with distilled water, then dried and ground to obtain the modified fly ash of copper ferromagnetic metal oxide.

[0028] Phosphorus removal experiments were carried out using the phosphorus adsorbent prepared by the above process. The phosphorus content of the water sample used is 10mg / L ， Take 0.14g of phosphorus adsorbent and put it into 100ml of water, adjust the pH value to 6.0, shake it at 25°C for 2 hours, and then apply a magnetic field to the water body, it can be observed that the adsorbent is separated from the solution, and the clear liquid can be removed. The concentration of residual phosphorus can be calculated as the purification rate of phosphoru...

Embodiment 2

[0031] Take 250ml 1mol / L ferrous sulfate solution and 100ml 1mol / L copper sulfate solution in a 1000ml beaker, heat to 70°C, add 30g fly ash, add NaOH to pH 9, ventilate for 20min and stir well, the reaction ends After that, it was left to stand for aging for 20 min, the precipitate was filtered out, washed with distilled water, then dried and ground to obtain the modified fly ash of copper ferromagnetic metal oxide.

[0032] Phosphorus removal experiments were carried out using the phosphorus adsorbent prepared by the above process. The phosphorus content of the water sample used is 10mg / L ， Take 0.14 grams of phosphorus adsorbent and put it into 100ml of water, adjust the pH value to 7.0, shake at 25 ° C for 2 hours, and then apply a magnetic field to the water body, it can be observed that the adsorbent is separated from the solution, and the clear liquid can be removed. The concentration of remaining phosphorus can be calculated as the purification rate of phosphorus in w...

Embodiment 3

[0035] Take 300ml of 1mol / L ferrous sulfate solution and 100ml of 1mol / L copper sulfate solution in a 1000ml beaker, heat to 70°C, add 45g of fly ash, add NaOH to pH 12, ventilate for 20min and stir well, the reaction ends After that, it was left to stand for aging for 20 min, the precipitate was filtered out, washed with distilled water, then dried and ground to obtain the modified fly ash of copper ferromagnetic metal oxide.

[0036] Phosphorus removal experiments were carried out using the phosphorus adsorbent prepared by the above process. The phosphorus content of the water sample used is 10mg / L ， Take 0.14g of phosphorus adsorbent and put it into 100ml of water, adjust the pH value to 8.0, shake at 25°C for 2 hours, and then apply a magnetic field to the water body, it can be observed that the adsorbent and the solution are separated, and the clear liquid can be removed. The concentration of remaining phosphorus can be calculated as the purification rate of phosphorus i...

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Abstract

The invention relates to a preparation method and an application of a copper and ferrous magnetic metal oxide modified fly ash phosphorus adsorbent. The method is characterized in that: a ferrous sulfate solution and a copper sulfate solution are well mixed; the mixture is heated to a temperature of 40 to 100 DEG C; fly ash is added to the mixture, wherein a proportion of ferrous sulfate to copper sulfate to fly ash is 200-500ml:100ml:1-150g. NaOH is added to the mixture until a pH value of the mixture is 6 to 14; air is delivered into the mixture for 5 to 120min such that magnetism is generated; the mixture is aged for 5 to 120min; precipitate is filtered from the mixture, and is washed by using distilled water; the precipitate is dried and ground, such that the modified fly ash phosphorus adsorbent is obtained. The invention is innovative in that: magnetic metal oxide is loaded on the surface of fly ash, such that the purification effect of fly ash upon phosphorus can be improved; dispersibility of the magnetic metal oxide is improved, such that the magnetic metal oxide has higher absorption efficiency; also, the absorbent used for absorbing phosphorous can easily be separated from water through a magnetic separation method, such that solid-liquid separation efficiency is improved.

Description

[0001] technical field [0002] The invention relates to a preparation method and application of a copper ferromagnetic metal oxide modified fly ash phosphorus adsorbent, which is a method for preparing an adsorbent for removing phosphorus in water by taking industrial waste fly ash as a raw material. The invention belongs to the technical field of solid waste comprehensive utilization and water treatment. [0003] Background technique [0004] With the increase of human development and utilization of environmental resources and the acceleration of industrial and agricultural production scale, more and more nutrients enter rivers and lakes, resulting in eutrophication of water bodies. The resulting eutrophication of lakes and rivers has become a major environmental problem facing our country. When the total phosphorus content in slow-flowing water bodies such as lakes and reservoirs exceeds 0.02mg / L, blue-green algae blooms may break out. Studies have shown that the growt...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F1/58
Inventor 许可李春光牛俊玲刘军坛彭伟功李见云王香平罗旭刘蕾姜灵彦梁丽珍何雪梅陈会凡
Owner ZHENGZHOU UNIVERSITY OF AERONAUTICS
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