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An Adsorbent Material for Efficiently Removing Phosphorus from Water

An adsorption material and water removal technology, applied in the direction of adsorption water/sewage treatment, water/sewage treatment, water/sludge/sewage treatment, etc. Problems such as not being put into use have achieved the effect of low price, wide application range and good effect

Active Publication Date: 2022-03-01
烟台哈勃藻华防治与生态修复科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional adsorbents have the following deficiencies: although natural materials have excellent adsorption properties, their cost is high and regeneration is difficult; while industrial and agricultural waste residues have poor adsorption effects despite their easy-to-obtain raw materials and low prices.
although It occupies a certain share in the foreign market, but due to the high price in the domestic market and the relatively low phosphorus adsorption capacity, it limits its popularization and application in eutrophic water bodies in my country.
However, other reported lanthanum-modified phosphorus removal adsorbents are limited to the indoor experimental stage and have not been put into use in the domestic market.
At present, there is no lanthanum-modified adsorbent that can effectively control water eutrophication for a long time in the domestic market, which greatly hinders the development of eutrophic water treatment in my country

Method used

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  • An Adsorbent Material for Efficiently Removing Phosphorus from Water
  • An Adsorbent Material for Efficiently Removing Phosphorus from Water
  • An Adsorbent Material for Efficiently Removing Phosphorus from Water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 4g of lanthanum chloride and 13g of aluminum chloride into a 1L Erlenmeyer flask (1); add 200mL of deionized water, and stir for 10min in a water bath at 60°C to dissolve completely (2); add 2mol L -1 Stop adding the sodium hydroxide solution until the pH is 9 (3); keep the system temperature at 60°C and continue heating for 10 hours (4); wash the product with about 1L deionized water for 3 to 4 times, centrifuge to remove the supernatant, and freeze Drying (5); Grinding to obtain the powdery product of phosphorus removal adsorbent (6). Among them, the content of lanthanum hydroxide accounts for 18% of the dry weight of the product, the content of aluminum hydroxide accounts for 77% of the dry weight of the product; the content of lanthanum aluminate accounts for 5% of the dry weight of the product; the applicable pH range is 4-10.

[0022] In the obtained powder: containing La%=13%; containing Al%=27%.

Embodiment 2

[0024] Weigh 4g of lanthanum chloride and 20g of aluminum chloride into a 1L Erlenmeyer flask (1); repeat steps (2) to (6) in Example 1 for the rest of the preparation process. Among them, the content of lanthanum hydroxide accounts for 14% of the dry weight of the product, the content of aluminum hydroxide accounts for 85% of the dry weight of the product; the content of lanthanum aluminate accounts for 1% of the dry weight of the product; the applicable pH range is 4-10.

[0025] In the obtained powder: containing La%=10%; containing Al%=29%.

Embodiment 3

[0027] Weigh 4g of lanthanum chloride and 27g of aluminum chloride into a 1L Erlenmeyer flask (1); repeat steps (2) to (6) in Example 1 for the rest of the preparation process. Among them, the content of lanthanum hydroxide accounts for 11% of the dry weight of the product, the content of aluminum hydroxide accounts for 86% of the dry weight of the product; the content of lanthanum aluminate accounts for 3% of the dry weight of the product; the applicable pH range is 4-10.

[0028] In the obtained powder: containing La%=8%; containing Al%=30%.

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Abstract

The invention relates to a novel adsorption material for efficiently removing phosphorus in water bodies, and belongs to the technical field of environmental protection. In the present invention, lanthanum compounds and aluminum compounds are selected as raw materials, and a highly efficient phosphorus removal adsorbent is prepared by co-precipitation, which can effectively remove different types of phosphorus in water through electrostatic attraction, ligand exchange and oxygen vacancy on the surface of the adsorbent. phosphorus. Compared with the existing adsorbent for phosphorus removal, the invention has simple preparation process, low production cost, high phosphorus removal efficiency, long-lasting phosphorus fixation effect, low ecological safety risk, wide application range of pH, and convenient storage, transportation and use.

Description

(1) Technical field [0001] The invention relates to an adsorption material for efficiently removing phosphorus in water bodies, and belongs to the technical field of environmental protection. (2) Background technology [0002] Eutrophication of water body has become one of the important water resource problems faced by human beings. At present, there are about 30% to 40% of lakes and reservoirs in the world with different levels of eutrophication. The problem of eutrophication of lakes in my country is even more severe, and the lakes with an area greater than 1km 2 More than 56% of the more than 2,300 lakes in China are in a state of eutrophication or are threatened by eutrophication. More than 80% of the eutrophic lakes in the world are phosphorus-limited, and the eutrophication process of most lakes in my country is also controlled by phosphorus nutrients. Therefore, the control and removal of phosphorus in water bodies has become a key link in the treatment of eutrophi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/08B01J20/30C02F1/28C02F1/58
CPCB01J20/0248B01J20/06B01J20/08C02F1/281
Inventor 潘纲徐睿张美一
Owner 烟台哈勃藻华防治与生态修复科技有限公司
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