Efficient compound iron-based phosphorous-removing adsorbent as well as preparation method, application method and regeneration method thereof

Abstract

The invention provides an efficient compound iron-based phosphorous-removing adsorbent as well as a preparation method, an application method and a regeneration method thereof, relates to a solid adsorbent composition, and particularly relates to a solid adsorbent composition for adsorbing phosphorous. The invention aims at providing the efficient compound iron-based phosphorous-removing adsorbent which is simple to prepare, has a good adsorption effect and is convenient to regenerate, as well as the preparation method, the application method and the regeneration method thereof. The efficient compound iron-based phosphorous-removing adsorbent comprises an iron-based oxide and a carrier; the mass ratio of the iron-based oxide to the carrier is (1-10) to 100. The preparation method provided by the invention is simple and easy to operate; the prepared efficient compound iron-based phosphorous-removing adsorbent has good adsorption efficiency on phosphorous in a wide spectrum pH value range; good phosphorous-removing capability can be recovered through simple regeneration operation. The efficient compound iron-based phosphorous-removing adsorbent can be used for the field of materials for removing pollutants including phosphorous in domestic sewage and industrial sewage through an adsorption method.

Description

technical field

[0001] The invention relates to a solid adsorbent composition, in particular to a solid adsorbent composition for adsorbing phosphorus. Background technique

[0002] Phosphorus is one of the essential elements for the survival of all living organisms, and it is also a non-renewable resource. The reserves of phosphate rock resources in nature are limited. my country's phosphate rock has been listed as one of the 20 minerals that cannot meet the needs of national economic development after 2010. While phosphorus resources are facing a shortage, excessive phosphorus discharge has caused a crisis of eutrophication in water bodies on a global scale. The annual economic losses caused by "algae blooms" and "red tides" are as high as 10 billion yuan. Studies have shown that phosphorus is the controlling factor in most eutrophic water bodies. Therefore, phosphorus removal from wastewater is an important means to prevent water eutrophication.

[0003] Due to the seve...

Examples

Embodiment 1

[0033] The preparation method of the high-efficiency composite iron-based phosphorus removal adsorbent of this embodiment is carried out according to the following steps:

[0034] One, prepare iron salt solution, ferrous salt solution, lanthanum salt solution and lye respectively;

[0035] 2. Fully mix the iron salt solution, ferrous salt solution, lanthanum salt solution and alkali solution prepared in step 1 under the conditions of aeration and stirring and a 60°C water bath, and continue aeration and stirring for 4 hours;

[0036] 3. Add diatomaceous earth and shake for 4 hours, let it stand for 12 hours for aging, discard the supernatant, and wash the solid with water until the pH of the cleaning solution is 7.3;

[0037] 4. Dry the cleaned solid in step 3 at 62° C. for 2 hours, then raise the temperature to 102° C. and keep it for 14 hours for drying to obtain a high-efficiency composite iron-based dephosphorization adsorbent.

Embodiment 2

[0039] The preparation method of the high-efficiency composite iron-based phosphorus removal adsorbent of this embodiment is carried out according to the following steps:

[0040] One, prepare iron salt solution, ferrous salt solution, lanthanum salt solution and lye respectively;

[0041] 2. Fully mix the iron salt solution, ferrous salt solution, lanthanum salt solution and alkali solution prepared in step 1 under the conditions of aeration and stirring and a 90°C water bath, and continue aeration and stirring for 2 hours;

[0042] 3. Add diatomaceous earth and shake for 3 hours, let it stand for 24 hours for aging, discard the supernatant, and wash the solid with water until the pH of the cleaning solution is 7.8;

[0043] 4. Dry the cleaned solid in step 3 at 75°C for 7h, then raise the temperature to 100°C and keep it for 24h for drying to obtain a high-efficiency composite iron-based dephosphorization adsorbent.

Embodiment 3

[0045] The preparation method of the high-efficiency composite iron-based phosphorus removal adsorbent of this embodiment is carried out according to the following steps:

[0046] One, prepare iron salt solution, ferrous salt solution, lanthanum salt solution and lye respectively;

[0047] 2. Fully mix the iron salt solution, ferrous salt solution, lanthanum salt solution and alkali solution prepared in step 1 under the conditions of aeration and stirring and a 75°C water bath, and continue aeration and stirring for 6 hours;

[0048] 3. Add diatomaceous earth and shake for 2 hours, let it stand for 2 hours for aging, discard the supernatant, and wash the solid with water until the pH of the cleaning solution is 6.8;

[0049] 4. Dry the cleaned solid in step 3 at 50° C. for 12 hours, then raise the temperature to 105° C. and keep it for 2 hours for drying to obtain a high-efficiency composite iron-based dephosphorization adsorbent.

[0050] The concentrations of iron salt solu...

technical field

[0001] The invention relates to a solid adsorbent composition, in particular to a solid adsorbent composition for adsorbing phosphorus. Background technique

[0002] Phosphorus is one of the essential elements for the survival of all living organisms, and it is also a non-renewable resource. The reserves of phosphate rock resources in nature are limited. my country's phosphate rock has been listed as one of the 20 minerals that cannot meet the needs of national economic development after 2010. While phosphorus resources are facing a shortage, excessive phosphorus discharge has caused a crisis of eutrophication in water bodies on a global scale. The annual economic losses caused by "algae blooms" and "red tides" are as high as 10 billion yuan. Studies have shown that phosphorus is the controlling factor in most eutrophic water bodies. Therefore, phosphorus removal from wastewater is an important means to prevent water eutrophication.

[0003] Due to the seve...

Examples

Embodiment 1

[0033] The preparation method of the high-efficiency composite iron-based phosphorus removal adsorbent of this embodiment is carried out according to the following steps:

[0034] One, prepare iron salt solution, ferrous salt solution, lanthanum salt solution and lye respectively;

[0035] 2. Fully mix the iron salt solution, ferrous salt solution, lanthanum salt solution and alkali solution prepared in step 1 under the conditions of aeration and stirring and a 60°C water bath, and continue aeration and stirring for 4 hours;

[0036] 3. Add diatomaceous earth and shake for 4 hours, let it stand for 12 hours for aging, discard the supernatant, and wash the solid with water until the pH of the cleaning solution is 7.3;

[0037] 4. Dry the cleaned solid in step 3 at 62° C. for 2 hours, then raise the temperature to 102° C. and keep it for 14 hours for drying to obtain a high-efficiency composite iron-based dephosphorization adsorbent.

Embodiment 2

[0039] The preparation method of the high-efficiency composite iron-based phosphorus removal adsorbent of this embodiment is carried out according to the following steps:

[0040] One, prepare iron salt solution, ferrous salt solution, lanthanum salt solution and lye respectively;

[0041] 2. Fully mix the iron salt solution, ferrous salt solution, lanthanum salt solution and alkali solution prepared in step 1 under the conditions of aeration and stirring and a 90°C water bath, and continue aeration and stirring for 2 hours;

[0042] 3. Add diatomaceous earth and shake for 3 hours, let it stand for 24 hours for aging, discard the supernatant, and wash the solid with water until the pH of the cleaning solution is 7.8;

[0043] 4. Dry the cleaned solid in step 3 at 75°C for 7h, then raise the temperature to 100°C and keep it for 24h for drying to obtain a high-efficiency composite iron-based dephosphorization adsorbent.

Embodiment 3

[0045] The preparation method of the high-efficiency composite iron-based phosphorus removal adsorbent of this embodiment is carried out according to the following steps:

[0046] One, prepare iron salt solution, ferrous salt solution, lanthanum salt solution and lye respectively;

[0047] 2. Fully mix the iron salt solution, ferrous salt solution, lanthanum salt solution and alkali solution prepared in step 1 under the conditions of aeration and stirring and a 75°C water bath, and continue aeration and stirring for 6 hours;

[0048] 3. Add diatomaceous earth and shake for 2 hours, let it stand for 2 hours for aging, discard the supernatant, and wash the solid with water until the pH of the cleaning solution is 6.8;

[0049] 4. Dry the cleaned solid in step 3 at 50° C. for 12 hours, then raise the temperature to 105° C. and keep it for 2 hours for drying to obtain a high-efficiency composite iron-based dephosphorization adsorbent.

[0050] The concentrations of iron salt solu...

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