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Adsorbing agent for adsorbing phosphate groups and adsorption method

A phosphate radical and adsorbent technology, applied in the field of phosphorus removal technology, can solve the problems of inability to achieve selective adsorption of phosphorus, inability to recover phosphorus, and limit practical application value, etc.

Inactive Publication Date: 2010-04-07
BEIJING NORMAL UNIVERSITY +1
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Problems solved by technology

above Cl - Type Zn-Al layered metal compounds and their calcined products may also adsorb sulfate ions while adsorbing phosphate ions, that is to say, they cannot achieve selective adsorption of phosphorus.
[0007] Therefore, using Cl - Type Zn-Al type layered metal compounds and their roasted products cannot achieve the selective adsorption of phosphorus when treating water, and cannot achieve the purpose of recycling phosphorus, which limits its practical application value.

Method used

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  • Adsorbing agent for adsorbing phosphate groups and adsorption method
  • Adsorbing agent for adsorbing phosphate groups and adsorption method
  • Adsorbing agent for adsorbing phosphate groups and adsorption method

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Embodiment Construction

[0032] An embodiment of the method for adsorbing phosphate radicals provided by the invention includes:

[0033] providing a ZnAl layered double hydroxide, contacting the ZnAl layered double hydroxide with an aqueous environment containing phosphate;

[0034] The ZnAl layered double metal hydroxide is NO 3 - Type ZnAl layered double hydroxide or calcined CO 3 2- Type ZnAl type layered double metal hydroxide.

[0035] According to the present invention, the CO 3 2- The molecular formula of type ZnAl layered double hydroxide is [Zn 0.66 Al 0.35 (OH) 2 ](CO 3 ) 0.18 0.53H 2 O, can be prepared according to the methods disclosed in the prior art. Preparation of the CO 3 2-Type ZnAl layered double hydroxides are preferably prepared using the reflux method. For example, after dissolving Zn salt and Al salt in a solvent to obtain a mixed solution, heat it to a reflux state, precipitate and filter it; the solvent will be decomposed by heating to produce CO 2 and raise t...

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Abstract

The invention provides an adsorbing agent for adsorbing phosphate groups and an adsorption method; the adsorption method comprises: ZnAl lamellar bimetal hydroxide is provided and is contacted with water environment containing the phosphate groups; the ZnAl lamellar bimetal hydroxide is NO3-type ZnAl lamellar bimetal hydroxide or CO32-type ZnAl lamellar bimetal hydroxide which is roasted. A test result shows that the NO3-type ZnAl lamellar bimetal hydroxide or the CO32-type ZnAl lamellar bimetal hydroxide which is roasted has high selectivity for the adsorption of the phosphate groups, thereby being beneficial to extracting and recovering phosphor from the water environment.

Description

technical field [0001] The invention relates to a phosphorus removal process, in particular to an adsorbent and an adsorption method for adsorbing phosphate radicals. Background technique [0002] Due to the wide application of phosphorus compounds in industry and agriculture, the large amount of phosphate waste generated has caused serious environmental pollution problems. High concentrations of phosphorus will cause eutrophication in lakes or oceans, and red tides will occur when the concentration is higher than 0.03mg / L. Red tide will not only cause the death of fish and other marine organisms due to lack of oxygen, but also release a large amount of harmful gases and toxins, seriously pollute the ocean and lake environment, and seriously pollute the normal ecosystem. [0003] On the other hand, phosphorus is an indispensable resource in the modern economy. With the large-scale exploitation of human beings, the phosphorus resources that can be exploited in nature have be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/58B01J20/08
Inventor 杨晓晶贺红梅
Owner BEIJING NORMAL UNIVERSITY
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