Dye recovery material without secondary pollution, preparation method thereof and dye recovery method

A technology for recycling materials and secondary pollution, applied in separation methods, water pollutants, chemical instruments and methods, etc., can solve problems such as large energy consumption and secondary pollution, achieve high-efficiency recovery, and have a wide range of applications

Pending Publication Date: 2022-05-13
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is a big problem to desorb the adsorbed dye.
At present, it is known to achieve desorption by adjusting pH, changing temperature or adding chemical reagents, but some of these methods will cause secondary pollution, and some need to consume a lot of energy

Method used

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  • Dye recovery material without secondary pollution, preparation method thereof and dye recovery method
  • Dye recovery material without secondary pollution, preparation method thereof and dye recovery method
  • Dye recovery material without secondary pollution, preparation method thereof and dye recovery method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of a dye recovery material without secondary pollution, comprising the following steps:

[0038] (1) Preparation of oxybismuth formate: Add 0.97014g of bismuth nitrate pentahydrate to a mixed solution consisting of 25ml of glycerol, 5ml of water and 10ml of N,N-dimethylformamide. Stir for 1 min to completely dissolve bismuth nitrate pentahydrate; put the dissolved mixed solution into a polytetrafluoroethylene hydrothermal reactor, react at 160°C for 15 hours, then cool naturally to room temperature, and centrifuge at 10,000r / min. Washing with deionized water and ethanol, and repeating 3 times; drying at 60°C to constant weight to obtain bismuth oxyformate;

[0039] (2) Modification of oxybismuth formate: Add 0.5 g of oxybismuth formate to a mixed solution consisting of 25 ml of glycerol, 5 ml of water and 10 ml of N,N-dimethylformamide, and simultaneously ultrasonicate the solution at 50 kHz and 400 r Dissolve oxybismuth formate completely under th...

Embodiment 2

[0041] Measure volume and be 50mL, concentration is the methylene blue solution of 10mg / L, by using nitric acid or sodium hydroxide solution, the pH value of methylene blue solution is adjusted to 7, then takes by weighing 0.025g of the material prepared in Example 1, and it is ultrasonically dispersed in The adsorption reaction was carried out in the dark under the methylene blue dye solution. After the adsorption equilibrium (adsorption rate is 49%), the light source is turned on to 420nm visible light for desorption. The desorption rate is 90%.

Embodiment 3

[0043] Measure the methylene blue solution with a volume of 50 mL and a concentration of 10 mg / L, and adjust the pH value of the methylene blue solution to 9 by using nitric acid solution. Then 0.025 g of the material prepared in Example 1 was weighed, ultrasonically dispersed into the methylene blue dye solution, and the adsorption reaction was carried out under dark conditions. After the adsorption equilibrium (adsorption rate is 60%), light sources with a wavelength of 420 nm were used for desorption. The desorption rate is 90%.

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Abstract

The invention discloses a preparation method of a dye recovery material without secondary pollution, which comprises the following steps: adding bismuth nitrate pentahydrate into a mixed solution, and carrying out ultrasonic treatment and stirring to dissolve the bismuth nitrate pentahydrate; reacting in a polytetrafluoroethylene hydrothermal reaction kettle, cooling, centrifuging, washing and drying to obtain bismuth formate oxide; adding bismuth formate into the mixed solution, and carrying out ultrasonic treatment and stirring until bismuth formate is dissolved; the preparation method comprises the following steps: dissolving citric acid in water, mixing the two solutions, adjusting the pH value, reacting in a polytetrafluoroethylene hydrothermal reaction kettle, cooling, centrifuging, washing and drying to obtain the dye recovery material. The material prepared by the invention can realize the desorption effect on pollutants only by illumination, and has the outstanding advantages of easiness in control, no secondary pollution and the like.

Description

technical field [0001] The invention relates to the technical field of functional material preparation and water pollution treatment, in particular to a dye recovery material without secondary pollution, a preparation method thereof and a dye recovery method. Background technique [0002] Due to the complex and changeable composition of industrial wastewater, the treatment of industrial wastewater has always been a difficult problem. On the other hand, many substances in industrial wastewater can be recycled and reused, which can not only reduce the treatment cost, but also reduce the pollution to the environment. Dye wastewater has the characteristics of high chroma, salinity and biological toxicity, and a large amount of dye wastewater cannot be well treated every year, which not only causes great harm to the natural environment and organisms, but also waste dye is a kind of Waste of resources. Recycling and reusing dyes in waste water is in line with major national stra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01J20/34C02F1/28C02F101/30
CPCB01J20/223C02F1/285B01J20/3425B01J20/3441C02F2101/308
Inventor 刘海津王冰杰彭建彪张亚昆丁丽曹鑫
Owner HENAN NORMAL UNIV
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