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Preparation method of phosphorus adsorption composite material and phosphorus adsorption composite material

A composite material, phosphate technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem that the adsorbent cannot be recycled

Inactive Publication Date: 2013-08-07
BEIJING NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the adsorption method generally uses sediments in rivers, lakes and other waters, blast furnace slag and pulverized coal to adsorb phosphorus, but these adsorbents cannot be recycled and will generate new waste

Method used

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  • Preparation method of phosphorus adsorption composite material and phosphorus adsorption composite material
  • Preparation method of phosphorus adsorption composite material and phosphorus adsorption composite material
  • Preparation method of phosphorus adsorption composite material and phosphorus adsorption composite material

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preparation example Construction

[0028] The invention provides a method for preparing a phosphorus adsorption composite material, comprising:

[0029] Exfoliating the ZnAl layered double metal hydroxide in a stripping solvent to obtain a stripped ZnAl layered double metal hydroxide colloidal solution;

[0030] Adding a polymer solution to the colloidal solution and mixing the polymer and the exfoliated ZnAl layered double hydroxide through electrostatic interaction or grafting to obtain a phosphorus adsorption composite material;

[0031] The high molecule is one or more of sulfonic acid polymer, iodine substituent polymer, chlorine-benzyl polymer and cellulose derivative.

[0032] According to the present invention, the polymers include natural organic polymers, such as cellulose derivatives; and synthetic organic polymers, such as sulfonic acid-based polymers, iodine-substituted polymers, and chloro-benzyl polymers. According to the present invention, the ZnAl layered double metal hydroxide is NO 3 - typ...

Embodiment 1

[0041] Example 1 Preparation of CO 3 2- Type ZnAl-LDH

[0042] AlCl 3 ·6H 2 O, urea and ZnCl 2 Mix with water to configure the mixed solution, the mixed solution contains 10mM Zn 2+ , 5mM Al 3+ , 35 mM urea, the mixture was heated to reflux at 100° C. and kept stirring for 24 hours. Then the precipitate was filtered, washed with deionized water and absolute ethanol, and dried under vacuum at 40 °C to obtain CO 3 2- Type ZnAl-LDH, XRD test results are as follows figure 1 shown.

Embodiment 2

[0043] Example 2 Preparation of NO 3 - Type ZnAl-LDH

[0044] Take 1 liter of NaNO containing 2mol / L 3 and 9mmol / L HNO 3 solution into the container, take 1g of the CO 3 2- Type ZnAl-LDH is put into the container and mixes with described solution, fills N in the container 2 5 minutes and seal the container. After ultrasonic treatment for 30 minutes and stirring for 24 hours, the precipitate was filtered, washed with degassed water and absolute ethanol for 5 times, and vacuum-dried at 40°C to obtain NO 3 - Type ZnAl-LDH, XRD patterns such as figure 2 shown. from figure 2 As can be seen in the CO 3 2- Type ZnAl-LDH interlayer spacing increased from 0.75nm to 0.88nm, indicating that the interlayer carbonate ions have been completely exchanged for nitrate ions.

[0045] Example 3 Stripping

[0046] Take 0.1g NO 3 - Type ZnAl-LDH was added to 100mL formamide, sealed, and shaken for 24 hours to obtain a colloidal solution of ZnAl-LDH nanosheets, and the XRD pattern...

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Abstract

The invention provides a preparation method of a phosphorus adsorption composite material, which comprises the following steps: stripping ZnAl layered bimetal hydroxide in a stripping solvent to obtain a stripped ZnAl layered bimetal hydroxide colloid solution; and adding a macromolecular solution into the colloid solution to compound the macromolecules and the stripped ZnAl layered bimetal hydroxide into a phosphorus adsorption composite material under static action or grafting action, wherein the macromolecules are one or more of sulfonic polymers, iodopolymers, chloro-benzyl polymers and cellulose derivatives. By stripping the ZnAl layered bimetal hydroxide and then compounding the stripped ZnAl layered bimetal hydroxide and the macromolecules into the phosphorus adsorption composite material, the specific area of the stripped ZnAl layered bimetal hydroxide is increased, thereby improving the phosphorus adsorption efficiency.

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] The eutrophication of lakes and the subsequent outbreak of cyanobacteria hydration have become a major problem faced by many countries in the world today. When the phosphorus concentration in lakes or seawater is higher than 0.03mg / L, red tides will occur. 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. 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 become less and less, and the so-called "phosphorus crisis" has emerged. Considering t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/58
Inventor 杨晓晶张燕茹陈婷婷唐雨晴
Owner BEIJING NORMAL UNIVERSITY
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