Modified activated aluminum oxide with high fluoride ion adsorption capability, and preparation method thereof

An activated alumina, high adsorption technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of increasing regeneration costs, loss of adsorbents, and increasing water production costs, and achieve fluoride removal. The effect of increasing the volume, reducing the processing cost, and considerable application prospects

Inactive Publication Date: 2016-10-12
李明宇
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the adsorption capacity of activated alumina for fluorine removal is relatively limited, which requires frequent regeneration, increases regeneration costs, and consumes adsorbents, thereby increasing water production costs.
[0004] In order to increase the fluorine removal adsorption capacity of activated alumina, Maliyekkal, Shukla, Jing Chuanyong, Shi Gantao and others modified granular activated alumina with different chemical reagents. The adsorption capacity has been increased to varying degrees, but their modification process is relatively strict. Although these modification methods have increased the adsorption capacity, they are not suitable for practical applications.

Method used

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  • Modified activated aluminum oxide with high fluoride ion adsorption capability, and preparation method thereof
  • Modified activated aluminum oxide with high fluoride ion adsorption capability, and preparation method thereof
  • Modified activated aluminum oxide with high fluoride ion adsorption capability, and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] like figure 1 As shown, the preparation method of modified activated alumina with high adsorption capacity for fluoride ions provided in this example comprises the following steps:

[0029] (1) Select activated alumina, wash it with deionized water until the washing water is no longer turbid, put the cleaned activated alumina in an oven at 105°C for 12 hours, and seal it for future use;

[0030] (2) Weigh 0.6g ferric sulfate solid, adopt deionized water to dissolve and be mixed with 100mL of 15mmol / L ferric sulfate solution;

[0031] (3) the standby active alumina 25g that is made in step (1), put into the ferric sulfate solution that the concentration that prepares in 25mL step (2) is 15mmol / L, discard ferric sulfate solution after soaking 3 hours, After washing with about 100mL of deionized water, dry in an oven at 105°C for 12 hours to obtain a modified activated alumina with high adsorption capacity for fluoride ions, which is sealed and stored for future use.

Embodiment 2

[0033] like figure 1 As shown, the preparation method of modified activated alumina with high adsorption capacity for fluoride ions provided in this example comprises the following steps:

[0034] (1) Select activated alumina, wash it with deionized water until the washing water is no longer turbid, put the cleaned activated alumina in an oven at 105°C for 12 hours, and seal it for future use;

[0035] (2) Weigh 1.2g ferric sulfate solid, adopt deionized water to dissolve and be mixed with 100mL of 30mmol / L ferric sulfate solution;

[0036] (3) the standby active alumina 25g that is made in step (1), put into the ferric sulfate solution that the concentration that prepares in 25mL step (2) is 30mmol / L, discard ferric sulfate solution after soaking 3 hours, After washing with about 100mL of deionized water, dry in an oven at 105°C for 12 hours to obtain a modified activated alumina with high adsorption capacity for fluoride ions, which is sealed and stored for future use.

Embodiment 3

[0038] like figure 1 As shown, the preparation method of modified activated alumina with high adsorption capacity for fluoride ions provided in this example comprises the following steps:

[0039] (1) Select activated alumina, wash it with deionized water until the washing water is no longer turbid, put the cleaned activated alumina in an oven at 105°C for 12 hours, and seal it for future use;

[0040] (2) Weigh 1.8g ferric sulfate solid, adopt deionized water to dissolve and be mixed with 100mL of 45mmol / L ferric sulfate solution;

[0041] (3) the standby active alumina 25g that is made in step (1), put into the ferric sulfate solution that the concentration that prepares in 25mL step (2) is 45mmol / L, discard ferric sulfate solution after soaking 3 hours, After washing with about 100mL of deionized water, dry in an oven at 105°C for 12 hours to obtain a modified activated alumina with high adsorption capacity for fluoride ions, which is sealed and stored for future use.

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Abstract

The invention discloses a preparation method of modified activated alumina with high adsorption capacity for fluoride ions, which comprises the following steps: (1) select activated alumina, wash and dry for standby; (2) select ferric sulfate, use After ionized water dissolves, ferric sulfate solution is obtained; (3) select activated alumina for subsequent use in step (1), place in the ferric sulfate solution of step (2), discard redundant ferric sulfate solution after soaking, wash, Drying can produce modified activated alumina with high adsorption capacity. The preparation method has simple operation modification process and is suitable for practical application. The present invention also discloses the modified activated alumina prepared by the above-mentioned preparation method of the modified activated alumina with high adsorption capacity for fluorine ions. Significantly improved, and can effectively reduce the cost of drinking water treatment.

Description

technical field [0001] The invention belongs to the technical field of modified activated alumina defluorination adsorbent, and in particular relates to a modified activated alumina with high adsorption capacity for fluorine ions and a preparation method thereof. Background technique [0002] Fluorine is an indispensable trace element to maintain the normal physiological functions of the human body. An appropriate amount of fluorine can make human teeth and bones stronger, and at the same time reduce the incidence of dental caries in children. But if long-term intake of excessive fluorine, the human body will appear a variety of symptoms of fluorosis, such as skeletal fluorosis and dental fluorosis. Drinking water is the main channel for humans to ingest fluorine. Excessive fluorine in drinking water will cause obvious damage to the human body. High-fluorine water is widely distributed around the world. About 200 million people drink water with fluorine content exceeding th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/30C02F1/28C02F1/58
CPCB01J20/08B01J20/0229C02F1/281
Inventor 李明宇
Owner 李明宇
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