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A method for decolorizing and adsorbing dyes in water by a zeolite-like imidazolate framework material

A technology of zeolite imidazolate and skeleton materials, which is applied in the application of decolorization and adsorption materials for decolorization and adsorption of dyes in water. The field of decolorization and adsorption of dyes in water by zeolite imidazolate skeleton materials, namely ZIFs materials, can solve the problems of high cost, difficult post-processing of materials, and cumbersome Problems such as the pretreatment section, to achieve the effect of controllable shape and solve the various changes in the pretreatment section, structure and function

Inactive Publication Date: 2011-12-07
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively high cost of the above-mentioned adsorbents, the cumbersome pretreatment process, and the difficult post-treatment of the materials after adsorption saturation, the application of such traditional adsorbents in the treatment of printing and dyeing wastewater is limited, and it is urgent to develop a new one. Adsorbent applied to printing and dyeing wastewater treatment

Method used

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  • A method for decolorizing and adsorbing dyes in water by a zeolite-like imidazolate framework material
  • A method for decolorizing and adsorbing dyes in water by a zeolite-like imidazolate framework material
  • A method for decolorizing and adsorbing dyes in water by a zeolite-like imidazolate framework material

Examples

Experimental program
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Embodiment approach 1

[0018] AB40 dye with an initial concentration of 60mg / l was placed in a 100ml Erlenmeyer flask, and 50mg of Zn-SOD was added as a decolorizing adsorption material. Stir for 6 hours under the condition of 2500r / min, the dye mixture after adsorption is filled in a centrifuge test tube and placed in a desktop high-speed centrifuge, centrifuged for 1 minute at a speed of 2500r / min, and the supernatant is obtained by filtration. The clear liquid was used for analyzing the decolorization rate, and the filter cake ZIFs material was air-dried at room temperature.

[0019] Decolorization rate detection method: use UV765 ultraviolet-visible spectrophotometer to measure the absorbance value of the dye at the maximum absorption wavelength before and after adsorption, and calculate the decolorization rate, decolorization rate = A 0 -A e / A 0 ; where A 0 is the absorbance value before adsorption, A e is the absorbance value after adsorption. The decolorization effect of the decolorizat...

Embodiment approach 2

[0021] AR151 dye wastewater with an initial concentration of 60mg / l was placed in a 100ml Erlenmeyer flask, and 50mg of Zn-RHO was added as a decolorizing adsorption material. Under the condition of 200r / min, stir for 4 hours, the dye mixture after adsorption is filled in a centrifuge test tube and placed in a desktop high-speed centrifuge, centrifuged at a speed of 4000r / min for 1 minute, and the supernatant is obtained by filtration. The clear liquid was used to analyze the decolorization rate, and the filter cake ZIFs material was air-dried at room temperature.

[0022] The detection method of the decolorization rate is the same as in Example 1. The decolorization effect of the decolorization adsorption material on AR151 dye is shown in figure 1 .

Embodiment approach 3

[0024] AY14 dye wastewater with an initial concentration of 100mg / l was placed in a 100ml Erlenmeyer flask, and 50mg of Zn-RHO was added as a decolorizing adsorption material. The Erlenmeyer flask was placed on a constant-speed magnetic stirrer at a temperature of 25°C and Under the condition of 400r / min, stir for 5 hours, the dye mixture after adsorption is filled in a centrifuge test tube and placed in a desktop high-speed centrifuge, centrifuged at a speed of 3000r / min for 1 minute, and the supernatant is obtained by filtration. The clear liquid was used to analyze the decolorization rate, and the filter cake ZIFs material was air-dried at room temperature.

[0025] The detection method of the decolorization rate is the same as in Example 1. The decolorization effect of the decolorization adsorption material on AY14 dye is shown in figure 1 .

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Abstract

The invention discloses a method for decolorizing and adsorbing a dye in water by using a zeolite-like imidazate framework material, relates to application of a decolorizing and adsorbing material in decolorization and adsorption of a dye in water, and belongs to the field of environment-friendly technology application. The method is characterized in that: the dye in the water is adsorbed by adopting the ZIFs material with structural diversity, large pore volume, high specific surface area and relatively high chemical and thermodynamic stability; the material has the characteristics of high yield, controllable shape and diverse structure and function change; and the ZIFs material of different structure is selected according to different dye molecules so as to achieve ideal decolorizing and adsorbing effects. The concentration and the color degree of the filtrate treated by the method are obviously reduced, the decolorizing rate can reach over 95 percent, the color degree can be reduced by 50 to 95 degrees, and the desorption rate reaches over 90 percent; and the ZIFs material can be circularly used in adsorption treatment of the dye, avoids secondary pollution of the water body and belongs to an environment-friendly sewage treatment material.

Description

technical field [0001] The invention discloses a method for decolorizing and adsorbing dyes in water by a zeolite-like imidazolate framework material, and relates to the application of a decolorizing and adsorbing material in water for decolorizing and adsorbing dyes, and belongs to the application field of environmental protection technology. Specifically, it refers to a zeolite-like imidazolate framework material that is A technical scheme of a method for decolorizing and adsorbing dyes in water by ZIFs materials. Background technique [0002] Printing and dyeing wastewater refers to a kind of wastewater generated during the bleaching, dyeing, printing and finishing processes of cotton, wool, chemical fiber and other fibers or other matrix textiles. Because the wastewater contains a large amount of organic dyes and salts, and has the characteristics of high chemical oxygen demand (COD), deep color and high turbidity, printing and dyeing wastewater has always been a difficu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28
Inventor 石琪宋正伟康小珍徐红董晋湘
Owner TAIYUAN UNIV OF TECH
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