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Preparation method of modified fly ash adsorbent used in phosphorous-containing waste water treatment

A waste water treatment, fly ash technology, applied in the environmental field, can solve problems such as ecological environment loss, water ecological imbalance, etc., and achieve low production cost, safe and simple, economical and simple effects

Inactive Publication Date: 2012-10-17
HUBEI FORBON TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the eutrophication of the water body is not controlled in time, it will cause the ecological imbalance of the water body and cause huge losses to the ecological environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A preparation method of a modified fly ash adsorbent for phosphorus-containing wastewater treatment:

[0019] 1) Mix fly ash and sodium hydroxide solution with a molar concentration of 1 mol / L at a solid-to-liquid weight ratio of 1:2, slowly pour the mixture into the reactor, and react at 100°C for 48 hours.

[0020] 2) The reaction product was washed with deionized water and dried at 80°C.

[0021] 3) The dried powder and the sulfuric acid solution with a molar concentration of 2 mol / L were mixed evenly at a solid-liquid weight ratio of 1:2, and stirred and reacted at room temperature for 2 hours;

[0022] 4) After cleaning the mixed liquid in step 3) with deionized water, dry it at 80°C to obtain the treated fly ash powder.

[0023] 5) The treated fly ash powder and polyaluminum chloride are uniformly mixed in a weight ratio of 1000:6 to obtain a modified fly ash adsorbent.

[0024] 6) Take 10 grams of the prepared modified fly ash adsorbent to treat 1000g phosphoru...

Embodiment 2

[0026] A preparation method of a modified fly ash adsorbent for phosphorus-containing wastewater treatment:

[0027] 1) Mix fly ash and sodium hydroxide solution with a molar concentration of 2 mol / L at a solid-to-liquid weight ratio of 1:10, slowly pour the mixture into the reactor, and react at 120°C for 30 hours.

[0028] 2) The reaction product was washed with deionized water and dried at 80°C.

[0029] 3) Mix the dried powder with a sulfuric acid solution with a molar concentration of 5 mol / L according to a solid-to-liquid weight ratio of 1:1, and stir and react at room temperature for 5 hours;

[0030] 4) After cleaning the mixed liquid in step 3) with deionized water, dry it at 80°C to obtain the treated fly ash powder.

[0031] 5) The treated fly ash powder and calcium oxide are uniformly mixed in a weight ratio of 1000:1 to obtain a modified fly ash adsorbent.

[0032] 6) Take 10 grams of the prepared modified fly ash adsorbent to treat 2000 g of phosphorus-containi...

Embodiment 3

[0034] A preparation method of a modified fly ash adsorbent for phosphorus-containing wastewater treatment:

[0035] 1) Mix fly ash and sodium hydroxide solution with a molar concentration of 5 mol / L at a solid-to-liquid weight ratio of 1:1, slowly pour the mixture into the reactor, and react at 180°C for 8 hours.

[0036] 2) The reaction product was washed with deionized water and dried at 80°C.

[0037] 3) The dried powder and the sulfuric acid solution with a molar concentration of 1mol / L are mixed evenly at a solid-to-liquid weight ratio of 1:10, and stirred and reacted at room temperature for 1 hour;

[0038] 4) After cleaning the mixed liquid in step 3) with deionized water, dry it at 80°C to obtain the treated fly ash powder.

[0039] 5) The treated fly ash powder and magnesium oxide are uniformly mixed in a weight ratio of 1000:9 to obtain a modified fly ash adsorbent.

[0040] 6) Take 10 grams of the prepared modified fly ash adsorbent to treat 1500 g of phosphorus-...

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PUM

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Abstract

The invention discloses a preparation method of a modified fly ash adsorbent used in phosphorous-containing waste water treatment. According to the invention, fly ash is subjected to an alkali modification process and an acid modification process; the modified fly ash is mixed with an absorbing auxiliary agent, such that the modified fly ash adsorbent is obtained. When the modified fly ash adsorbent provided by the invention is used for treating phosphorous-containing waste water with a concentration of 25mg / L, the effect is substantial, and a national first-grade discharging standard can be achieved. Compared with prior arts, the treatment method provided by the invention is advantaged in resource reasonable utilization, consumption reduction, time saving, effort saving, and substantial effect. Therefore, a novel concept is provided for fly ash comprehensive utilization and water body eutrophication controlling.

Description

technical field [0001] The invention relates to the field of environment, in particular to a method for preparing a modified fly ash adsorbent used for treating phosphorus-containing wastewater. Background technique [0002] With the rapid development of the economy and the increase of the population, the discharge of various types of sewage continues to increase, causing the sewage containing a large amount of essential elements for aquatic growth to be discharged into the water body, causing aquatic organisms to multiply in a short period of time, thus causing the water body to become rich. nutritional issues. If the eutrophication of the water body is not controlled in time, it will cause the ecological imbalance of the water body and cause huge losses to the ecological environment. [0003] It is generally believed that excessive nitrogen and phosphorus nutrients are the main factors causing eutrophication of water bodies, while phosphorus is the controlling factor in m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28
Inventor 宋功武王仁宗何瑜钟书华沙淮丽
Owner HUBEI FORBON TECH
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