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Method for preparing concavo-convex rod soil/zinc oxide nanometer composite material

A nano-zinc oxide and attapulgite technology, which is applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of inability to reflect the adsorption performance of nano-attapulgite, weakening the effect of acidification modification, and large attapulgite particles. Achieve the effect of not easy precipitation and stratification, low processing cost and good dispersion performance

Inactive Publication Date: 2009-06-03
JIANGSU POLYTECHNIC UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method has avoided the generation of a large amount of acid sewage and the complexity of acid washing, the disadvantages of this method are: (1) it needs to consume a large amount of sulfuric acid and alkali; The produced metal cations re-form precipitation, which weakens the effect of acidification modification; (3) the attapulgite particles used are large, which cannot reflect the special adsorption properties of nano-attapulgite; (4) calcination at 700 ° C will destroy the attapulgite structure, resulting in a sharp decrease in its specific surface area and a decrease in its adsorption capacity

Method used

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  • Method for preparing concavo-convex rod soil/zinc oxide nanometer composite material
  • Method for preparing concavo-convex rod soil/zinc oxide nanometer composite material
  • Method for preparing concavo-convex rod soil/zinc oxide nanometer composite material

Examples

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Effect test

Embodiment 1

[0032] Add attapulgite to deionized water to prepare attapulgite containing 100g L -1 Add 4L of the suspension of attapulgite to 3% sodium hexametaphosphate, use ME-100 high-shear mixing and emulsifying machine (US Ross Company) to disperse for 2 hours at a speed of 6000 rpm, let it stand for 100 hours, and remove the lower part The impurity precipitated, and the obtained solid content was 75g·L -1 nano-attapulgite dispersion. Measure 400mL of nano-attapulgite dispersion and place it in a 1000mL four-necked flask. -1 Aqueous solution of zinc sulfate and a concentration of 0.3mol L -1 sodium carbonate aqueous solution, the control reaction temperature is 30 ℃, the pH value of the reaction system mixed solution is 6.0, the consumption of zinc sulfate is based on the mass of generating ZnO, accounts for 10% of the nano attapulgite quality, after the reaction solution is added dropwise, Stirring was continued for 0.5 hours. Filter and wash repeatedly with deionized water until...

Embodiment 2

[0035] Add attapulgite to deionized water to prepare attapulgite containing 50g L -1 Add 3L of the suspension of attapulgite mass 2% sodium pyrophosphate, use ME-100 high-shear mixing emulsifier (US Ross Company) to disperse for 10h at a speed of 4000 rpm, let stand for 80h, remove the lower Impurities were precipitated to obtain a solid content of 38g L -1 nano-attapulgite dispersion. Measure 600mL of nano-attapulgite dispersion and place it in a 1000mL four-necked flask. While stirring, add 3mol·L -1 Zinc chloride aqueous solution and concentration of 2mol L -1 Ammonium carbonate aqueous solution, control reaction temperature is 60 ℃, the pH value of reaction system mixed solution is 6.8, the consumption of zinc chloride is based on the mass meter that generates ZnO, accounts for 100% of nano attapulgite quality, after reaction solution is added, Stirring was continued for 5 hours. Filter and wash repeatedly with deionized water until the conductivity of the filtrate is ...

Embodiment 3

[0038] Add attapulgite to deionized water to prepare attapulgite containing 200g L -1 Add 3.5L of the suspension of attapulgite to 4% sodium polyacrylate, use a ME-100 high-shear mixing emulsifier (US Ross Company) to disperse for 4 hours at a speed of 5000 rpm, let it stand for 150 hours, and remove the lower part The impurity precipitates, and the obtained solid content is 150g·L -1 nano-attapulgite dispersion. Measure 300mL of nano-attapulgite dispersion and place it in a 1000mL four-necked flask. -1 Zinc nitrate aqueous solution and concentration of 1mol L -1 potassium carbonate aqueous solution, the control reaction temperature is 100 ° C, the pH value of the reaction system mixed solution is 8.0, the consumption of zinc nitrate is based on the mass of ZnO generated, accounting for 50% of the quality of nano attapulgite, after the reaction solution is added, continue Stir for 3 hours. Filter and wash repeatedly with deionized water until the conductivity of the filtra...

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Abstract

The invention discloses a method for preparing concavo-convex rod soil / zinc oxide nanometer composite materials, which comprises the following steps: purifying and dispersing the concavo-convex rod soil in water to prepare concavo-convex rod soil dispersion liquid; then adjusting the temperature of the concavo-convex rod soil dispersion liquid to 30 to 100 DEG C; agitating the concavo-convex rod soil dispersion liquid dispersion liquid and while adding zinc salt aqueous solution with the concentration of 0.3 to 3 mol.L<-1> and carbonate aqueous solution with the concentration of 0.3 to 2 mol.L<-1> to the concavo-convex rod soil dispersion liquid dispersion liquid; and keeping the pH value of mixed liquid within the range of 6.0 to 8.0. The prepared mixed serous fluid comprising the prepared nanometer concavo-convex rod soil and basic zinc carbonate is filtered; and a filter cake is washed by deionized water; when the electrical conductivity of filtrate is less than 300 MuS.cm<-1>, the washing is finished; and the filter bake obtained is dried at the temperature of below 100 DEG C, then baked for 1 to 10 hours at the temperature of 300 to 600 DEG C, and finally crushed. The invention is simple and has the advantages of low energy consumption and high safety; the load of the adsorbing material prepared is uniform and has good dispersibility, strong adsorbability and remarkable photo-catalyzed degradation property.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and relates to a method for preparing attapulgite / zinc oxide nano composite material. Background technique [0002] Printing and dyeing wastewater has the characteristics of high chroma, various varieties, different structures, high toxicity and difficult treatment. It is still one of the difficult problems in industrial wastewater treatment so far. At present, the treatment methods of dye wastewater include physical treatment, chemical treatment and biological treatment. [0003] The removal of pollutants in water by physical treatment has the advantages of high efficiency, fast speed, strong adaptability and easy operation, and it only occurs on the solid surface without further chemical reactions, and generally does not introduce new chemical substances into the treated water. Adsorption is the most commonly used physical treatment method, and the adsorbents used mainly includ...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/30
Inventor 姚超刘敏陈志刚李为民胡晓莉刘建平
Owner JIANGSU POLYTECHNIC UNIVERSITY
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