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Supported manganese dioxide adsorbent and method for treating aniline waste water through same

A technology for manganese dioxide and aniline wastewater, applied in the direction of adsorption water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., to achieve the effect of less usage, good removal effect and large adsorption capacity

Active Publication Date: 2014-05-14
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small size of nanoscale adsorbents, there are disadvantages such as easy agglomeration, side reactions, difficult separation, and secondary pollution.

Method used

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  • Supported manganese dioxide adsorbent and method for treating aniline waste water through same
  • Supported manganese dioxide adsorbent and method for treating aniline waste water through same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Weigh 0.674g of potassium permanganate solid and dissolve it in 40mL of deionized water, add 2mL of ethylene glycol under magnetic stirring, and the solution is uniform after stirring for 20 minutes. It was added into a 100mL autoclave and heated at 160°C for 10 hours. After the autoclave was cooled to room temperature, the brown powdery solid was separated by centrifugation (7000rpm, 10min), and the impurities in the product were washed with water, ethanol, and water in sequence. Vacuum drying in a vacuum oven at 80°C for 5 hours to obtain submicron octahedral powder of trimanganese tetraoxide with a particle size of 100-800nm.

[0040] Disperse 0.1 g of manganese tetraoxide powder obtained by ultrasonic method into 50 mL of deionized water, add 0.25 g of potassium permanganate and 0.8 mmol of 37% hydrochloric acid, and stir evenly. Under the condition of magnetic stirring, seal and heat in an oil bath at 80° C. for 5 hours. After the container is cooled to room temp...

Embodiment 2

[0043]Weigh 0.674g of potassium permanganate solid and dissolve it in 40mL of deionized water, add 2mL of ethylene glycol under magnetic stirring, and stir for 40 minutes to make the solution uniform. Pour it into a 100mL autoclave and heat it at 160°C for 10 hours. After the autoclave was cooled to room temperature, the brown powder was separated by centrifugation (10000rpm, 5min), and the impurities in the product were washed with water, water and ethanol in sequence. Vacuum dry in a vacuum oven at 70°C for 8 hours to obtain submicron octahedral powder of trimanganese tetraoxide with a particle size of 100-800nm.

[0044] Disperse the obtained 0.1g manganese tetraoxide powder into 50mL deionized water by ultrasonic method, add 0.25g potassium permanganate and 1.0mmol37% hydrochloric acid, stir evenly, and heat it in a sealed oil bath at 95°C for 23 hours under magnetic stirring . After the container is cooled to room temperature, centrifuge the solid-liquid mixture at 10,0...

Embodiment 3

[0047] Weigh 0.606g of sodium permanganate solid and dissolve it in 30mL of deionized water, add 1.5mL of ethylene glycol under magnetic stirring, and stir for 30 minutes to make the solution uniform. The mixture was poured into a 50mL autoclave, and heated at 160°C for 10 hours. After the autoclave was cooled to room temperature, the brown powder was separated by centrifugation (8000rpm, 8min), and the impurities in the product were washed with water, water and ethanol in sequence. Vacuum-dry in a vacuum oven at 50°C for 12 hours to obtain octahedral manganese tetraoxide submicron powder with a particle size of 100-800nm.

[0048] Disperse 0.1 g of manganese tetraoxide powder obtained by ultrasonic method into 50 mL of deionized water, add 0.25 g of sodium permanganate and 1.5 mmol of 37% hydrochloric acid, stir evenly, and heat in a sealed oil bath at 105°C for 8 hours. After the container is cooled to room temperature, centrifuge the solid-liquid mixture at a speed of 8000...

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Abstract

The invention relates to a supported manganese dioxide adsorbent and a method for treating aniline waste water through the same, and belongs to the technical field of waste water treatment. The absorbent comprises nanometer sheet-shaped birnessite type manganese dioxide and transition metallic oxide carriers, wherein the particle size of the carriers is one hundred to thirty hundred nanometers, the thickness of the sheet-shaped manganese dioxide is one to one hundred nanometers and the content of the sheet-shaped manganese dioxide is, by weight, fifteen to twenty percent. The method for treating the aniline waste water through the supported manganese dioxide adsorbent is characterized by comprising the steps that the supported manganese dioxide adsorbent is prepared through the hydrothermal method, the supported manganese dioxide adsorbent is added into the aniline waste water with the PH value being three to fourteen, vibration is conducted fully and centrifugal separation is conducted. The adsorbent is high in adsorption capacity, not prone to agglomeration, high in adsorption efficiency, capable of being recycled, and capable of lowering the concentration of the high-concentration aniline waste water to five to seven hundred milligram per liter. The method has the advantages that operation is simple, recovery treatment is convenient and raw materials are cheap and easy to obtain.

Description

[0001] technical field [0002] The invention relates to a loaded manganese dioxide adsorbent and a method for using it to pretreat aniline wastewater, belonging to the technical field of wastewater treatment. Background technique [0003] With the development of the chemical industry, the number and types of organic pollutants are increasing year by year, and a large number of toxic and harmful organic pollutants are discharged into rivers, causing serious pollution of water bodies. Aniline is the most representative substance of aromatic amines. It is a colorless oily liquid with aromatic odor. It is widely used in industries such as national defense, printing and dyeing, plastics, pesticides and medicine. It is also a substance that seriously pollutes the environment and endangers human health. , is a "carcinogenic, teratogenic, and mutagenic" three-causing substance, which has been included in the "China Environmental Priority Pollutants Blacklist". Domestic chemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06C02F1/28C02F101/38
Inventor 肖巍汪的华徐寅刘文婷
Owner WUHAN UNIV
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