Method for preparing Fe3O4@ZrO(OH)2 magnetic nano-adsorbing material for high-efficient fluoride removal from drinking water

A magnetic nanometer and adsorption material technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems of secondary pollution, fast attenuation of adsorption performance, low fluorine removal efficiency, etc. Fast, short adsorption path, simple effect

Inactive Publication Date: 2010-08-25
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing defluorinating agents have their own shortcomings, such as low defluoridation efficiency, fast decay of adsorption performance, and easy to cause secondary pollution and other problems.

Method used

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  • Method for preparing Fe3O4@ZrO(OH)2 magnetic nano-adsorbing material for high-efficient fluoride removal from drinking water
  • Method for preparing Fe3O4@ZrO(OH)2 magnetic nano-adsorbing material for high-efficient fluoride removal from drinking water
  • Method for preparing Fe3O4@ZrO(OH)2 magnetic nano-adsorbing material for high-efficient fluoride removal from drinking water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Preparation of Magnetic Nano Fe by Co-precipitation 3 o 4 Microspheres and Magnetic NanoFe 3 o 4 @ZrO(OH) 2 Composite microspheres. Weigh 27.000gFeCl 3 ·6H 2 O and 15.000 g FeSO 4 ·7H 2 Mix O in a three-neck flask, add 50mL of deionized water, blow nitrogen for 2-3min, put it into a constant temperature water bath at 85°C under the condition of mechanical stirring, add 150mL of 2mol / L NaOH dropwise, and react for two hours Magnetic Fe can be obtained by washing with an external magnetic field 3 o 4 Microspheres.

[0014] Weigh 3.000g of prepared magnetic nano-Fe 3 o 4 Add microspheres and 50mL deionized water into a three-necked flask, put it into a constant temperature water bath at 85°C under the condition of mechanical stirring, first add 22.810g ZrOCl dropwise 2 ·8H 2 After the solution of O, add 2mol / L NaOH solution dropwise until the color of the solution changes from black to dark yellow. After two hours of reaction, use an external magnetic field t...

Embodiment 2

[0016] Take by weighing 3.000g magnetic nanometer Fe that above-mentioned example prepares 3 o 4 Add microspheres and 50mL deionized water into a three-necked flask, put it into a constant temperature water bath at 85°C under the condition of mechanical stirring, first add 11.405g ZrOCl dropwise 2 ·8H 2 After the solution of O, add 2mol / L NaOH solution dropwise until the color of the solution changes from black to dark yellow. After reacting for 1 hour, use an external magnetic field to separate and wash to obtain magnetic nano-Fe 3 o 4 with ZrO(OH) 2 Magnetic nano-Fe with a mass ratio of 3:5 3 o 4 @ZrO(OH) 2 Composite microspheres.

Embodiment 3

[0018] Take by weighing 3.000g example 1 prepared magnetic nano-Fe 3 o 4 Add the microspheres and 50mL deionized water into the three-necked flask, and put it into the magnetic nano-Fe in the constant temperature water bath at 85°C under the condition of mechanical stirring. 3 o 4 Add microspheres and 50mL deionized water into a three-necked flask, put it into a constant temperature water bath at 85°C under the condition of mechanical stirring, first add 45.621g ZrOCl dropwise 2 ·8H 2 After the solution of O, add 2mol / L NaOH solution dropwise until the color of the solution changes from black to dark yellow. After reacting for 3 hours, use an external magnetic field to separate and wash to obtain magnetic nano-Fe 3 o 4 with ZrO(OH) 2 Magnetic nano-Fe with a mass ratio of 3:20 3 o 4 @ZrO(OH) 2 Composite microspheres.

[0019] Obtain magnetic Fe as shown in Figure 2 by embodiment 1,2,3 3 o 4 @ZrO(OH) 2 Adsorption isotherm of fluoride ions by composite nano-materials ...

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Abstract

The invention discloses a method for preparing an Fe3O4@ZrO(OH)2 magnetic nano-adsorbing material for high-efficient fluoride removal from drinking water. The method comprises the following steps: (1) preparing magnetic nano-Fe3O4 microspheres by using a coprecipitation method; and (2) adding the magnetic nano-Fe3O4 microspheres and deionized water into a reaction vessel; adding a certain amount of solution of zirconium salt dropwise into the reaction vessel under the condition of mechanical stirring; adding the solution of NaOH into the reaction vessel dropwise; and separating and washing by utilizing an externally-applied magnetic field after heating, refluxing and reacting for 1 to 3 hours so as to obtain the magnetic nano-Fe3O4@ZrO(OH)2 composite microspheres. The method has the following advantages that: 1, adsorption capacity is large, so the method is suitable for advanced treatment of large volume of drinking water; 2, the removal speed is high, and the adsorption paths of nano-particles are short; and 3, the preparation is simple because the overall preparation process has no need of complex reaction process, special reaction equipment or harsh reaction temperature, the operation is simple and easy to implement, and the reproducibility is high.

Description

technical field [0001] The invention relates to a material for removing fluorine from water bodies, in particular to a Fe material for highly efficient removal of fluorine from drinking water. 3 o 4 @ZrO(OH) 2 A method for preparing a magnetic nano-adsorption material. Background technique [0002] Fluorine widely exists in the groundwater environment, and mainly originates from the leaching and release of fluorine in rocks, minerals and soil during natural geochemical processes. my country's drinking water hygiene standards stipulate that the content of fluoride in drinking water should not exceed 1.0mg / L. Excessive intake of fluorine will damage human health. Therefore, the development of efficient, cheap and stable adsorbents is of great significance for the deep defluoridation treatment of drinking water. At present, methods for removing fluoride from drinking water include adsorption, coagulation, electrocoagulation, and membrane separation. Coagulation sedimentati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/28B01J20/32C02F1/28C02F1/58C02F101/14
Inventor 罗旭彪吴少林马明涂新满罗胜联
Owner NANCHANG HANGKONG UNIVERSITY
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