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Preparation method for adsorbent for removing phosphorus in water

A phosphorus adsorbent, seawater technology, applied in the field of environmental engineering, can solve problems such as poor adsorption capacity, and achieve the effect of high phosphorus removal rate

Inactive Publication Date: 2017-09-22
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Kaolin, as a common natural adsorbent, has relatively poor adsorption capacity for phosphorus in water, so it needs to be modified. A method of modifying kaolin is disclosed in a Chinese patent application (publication number: 106492746A), and it is applied to livestock Phosphorus removal from poultry wastewater

Method used

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  • Preparation method for adsorbent for removing phosphorus in water
  • Preparation method for adsorbent for removing phosphorus in water
  • Preparation method for adsorbent for removing phosphorus in water

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Add 2L of seawater to 40g of kaolin (the seawater is first filtered to remove some solid impurities) and mix, and mechanically stir at room temperature for 6 hours, then allow the kaolin to precipitate naturally, remove the clarified liquid, and wash with water 3 times to obtain kaolin mud;

[0027] The kaolin mud is first dried at 105°C, then the agglomerated kaolin is pulverized, and then calcined at 600°C to obtain the water phosphorus removal adsorbent of the present invention, marked as KS600.

Embodiment 2

[0029] Add 3L of seawater to 40g of kaolin (the seawater is first filtered to remove some solid impurities) and mix, and mechanically stir at room temperature for 5 hours, then allow the kaolin to precipitate naturally, remove the clarified liquid, and wash with water twice to obtain kaolin mud;

[0030] The kaolin mud is first dried at 100°C, then the agglomerated kaolin is pulverized, and then calcined at 800°C to obtain the water phosphorus removal adsorbent of the present invention, marked as KS800.

Embodiment 3

[0032] Add 1L of seawater to 40g of kaolin (the seawater is first filtered to remove some solid impurities) and mix, and mechanically stir at room temperature for 8 hours, then allow the kaolin to precipitate naturally, remove the clarified liquid, and wash with water 3 times to obtain kaolin mud;

[0033] The kaolin slurry is first dried at 90°C, then the agglomerated kaolin is pulverized, and then calcined at 500°C to obtain the water phosphorus removal adsorbent of the present invention.

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Abstract

The invention relates to a preparation method of an adsorbent, in particular to a preparation method of an adsorbent for removing phosphorus in water, and belongs to the field of environmental engineering. A method for preparing an adsorbent for removing phosphorus in water, the method comprising the following steps: adding seawater to kaolin, mechanically stirring and mixing at room temperature, removing the clarified liquid after natural precipitation, and washing with water to obtain kaolin mud; Drying, crushing, and calcining to obtain an adsorbent for phosphorus removal in water. Compared with the prior art, the invention adopts a simple method to prepare an adsorbent for phosphorus removal in water, and the phosphorus removal rate of the adsorbent is extremely high, greater than 97%, even up to 99%.

Description

technical field [0001] The invention relates to a preparation method of an adsorbent, in particular to a preparation method of an adsorbent for removing phosphorus in water, and belongs to the field of environmental engineering. Background technique [0002] With the development of economy and society, phosphorus-containing detergents, pesticides and chemical fertilizers are used in large quantities, seriously polluting environmental water bodies. . Phosphorus-polluted water bodies are prone to cause algae to bloom in large numbers. After the algae die and decompose, the water body will produce musty and foul smells. Studies have shown that phosphorus is an important factor causing water eutrophication, so phosphorus removal from wastewater is an important means to prevent water eutrophication. [0003] Phosphorus removal by adsorption is a method of phosphorus removal that utilizes the affinity of certain porous or large specific surface area solid substances to phosphate...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/12B01J20/041B01J20/28059B01J20/3078C02F1/281C02F2101/105
Inventor 李建荣
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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