Method for treating waste water by using cyclic regeneration porous hollow aluminum oxide nano fiber

A hollow alumina and nanofiber technology is applied in the field of porous hollow alumina nanofiber treatment of wastewater, which can solve the problems affecting the adsorption efficiency of alumina on water pollutants and the low specific surface area of ​​alumina, and achieve high sewage treatment capacity and high efficiency. Specific surface area, simple operation effect

Inactive Publication Date: 2013-09-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated alumina can adsorb dyes due to the hydroxyl groups on the surface, but the activated alumina currently used is generally granular or spherical, and the particle size

Method used

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  • Method for treating waste water by using cyclic regeneration porous hollow aluminum oxide nano fiber
  • Method for treating waste water by using cyclic regeneration porous hollow aluminum oxide nano fiber
  • Method for treating waste water by using cyclic regeneration porous hollow aluminum oxide nano fiber

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Experimental program
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Effect test

Embodiment 1

[0026] Porous hollow alumina nanofibers were prepared by electrospinning with an average diameter of 450 nm and a specific surface area of ​​48 m 2 / g, 0.01g of nanofibers were dispersed in 15g of methylene blue aqueous solution (100mg / L), stirred and adsorbed for 2h, and analyzed by ultraviolet spectroscopy, the removal rate of methylene blue in the solution was 91.3%. The dye-adsorbed nanofibers were calcined at 500 °C for 2 h, and then placed in the same concentration of dye solution for the second and third adsorption. The removal rates of dye in the solution were 89.7% and 88%, respectively.

Embodiment 2

[0028] Porous hollow alumina nanofibers were prepared by electrospinning with an average diameter of 280 nm and a specific surface area of ​​61 m 2 / g, disperse 0.02g of nanofibers in 15g of Congo red aqueous solution (50mg / L), stir and absorb for 2h, and the removal rate of Congo red in the solution is 97.7% by ultraviolet spectrum analysis. The dye-adsorbed nanofibers were calcined at 700°C for 4 hours, and then placed in the same concentration of dye solution for the second and third adsorption. The removal rates of dye in the solution were 94.7% and 92%, respectively.

Embodiment 3

[0030] Porous hollow alumina nanofibers were prepared by electrospinning with an average diameter of 790 nm and a specific surface area of ​​44 m 2 / g, disperse 0.03g of nanofibers in 15g of methyl orange aqueous solution (100mg / L), stir and adsorb for 2h, and the removal rate of Congo red is 92% by ultraviolet spectrum analysis. The dye-adsorbed nanofibers were calcined at 600°C for 4 hours, and the dye molecules were removed and placed in the same concentration of dye solution for the second and third adsorption. The removal rates of dye in the solution were 88.7% and 86% respectively. %.

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Abstract

The invention relates to a method for treating waste water by using cyclic regeneration porous hollow aluminum oxide nano fiber. The method comprises the following steps: dipping porous hollow aluminum oxide nano fiber into dye waste water, stirring and adsorbing for 5 to 120 min so as to obtain porous hollow aluminum oxide nano fiber with dye absorbed, and then carrying out calcination and desorbing dye molecules for recycling utilization, wherein the mass ratio of the porous hollow aluminum oxide nano fiber and dye is 80:3 to 160:1. The method for treating wastewater, provided by the invention, is simple in process, low in cost, can be cyclically utilized, and has positive effects to renewable utilization of resources and environment protection.

Description

technical field [0001] The invention belongs to the field of waste water treatment methods, in particular to a method for treating waste water by using recycled porous hollow aluminum oxide nanofibers. Background technique [0002] Water is a precious natural resource and the material basis for the survival of human beings and all living things. The total global water storage is estimated to be 1.39 billion cubic kilometers, of which oceans account for 97.2%, while the total fresh water is only 36 million cubic meters, of which the total available fresh water is less than 1% of the world's total water storage. [0003] On March 18, 2012, the United Nations issued a warning that by 2025, nearly one-third of the world's population (2.3 billion) will not have access to safe drinking water unless governments around the world take strong measures. China's water resources are 2.8 trillion cubic meters, accounting for 6% of global water resources, ranking fourth in the world after...

Claims

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Application Information

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IPC IPC(8): C02F1/28
Inventor 刘朋超马敬红龚静华徐坚
Owner DONGHUA UNIV
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