Modified nano TiO2/Ag/bamboo charcoal composite material and method for killing microorganisms in medical sewage by virtue of same

A composite material and bamboo charcoal technology, applied in the field of TiO2/Ag/bamboo charcoal composite materials, can solve the problems of serious bio-fouling and pungent odor in the pipe network

Inactive Publication Date: 2013-12-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent discloses a medical sewage treatment system. The sewage first passes through the MBR membrane filter tank to remove solid particles in the water, and then passes through the mixed disinfection tank for sterilization. This system does have many advantages. We only propose that the sterilization part of the system use

Method used

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  • Modified nano TiO2/Ag/bamboo charcoal composite material and method for killing microorganisms in medical sewage by virtue of same
  • Modified nano TiO2/Ag/bamboo charcoal composite material and method for killing microorganisms in medical sewage by virtue of same
  • Modified nano TiO2/Ag/bamboo charcoal composite material and method for killing microorganisms in medical sewage by virtue of same

Examples

Experimental program
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Embodiment 1

[0028] Example 1: 1. Add 1 part of butyl titanate and 3 parts of absolute ethanol by volume into a dry clean container and stir evenly to make A solution, then add 0.3 parts of nitric acid with a concentration of 0.21mol / L Add iron solution, 1 part of absolute ethanol, and 0.5 part of glacial acetic acid by volume into a dry container and stir evenly to make solution B; ②, slowly add solution B to solution A, stir while adding, and dropwise complete Then continue to stir for about 30 minutes to form a stable sol, and age the sol for about 5 hours for use; ③. After putting the bamboo charcoal into the aged sol prepared in step ②, treat it under ultrasonic conditions with a frequency of 45KHz at 32°C for 1 hour to dilute the sol. The gel enters the internal pores of the bamboo charcoal, and then the bamboo charcoal is taken out and dried at 80°C; ④, the bamboo charcoal is taken out of the drying oven in step ③ and roasted in a tube furnace at 550°C for 3 hours in a nitrogen atmos...

Embodiment 2

[0029] Example 2: 1. Add 1 part of butyl titanate and 3 parts of absolute ethanol by volume into a dry container and stir evenly to make A solution, then add 0.4 parts of nitric acid with a concentration of 0.21mol / L Add iron solution, 1 part of absolute ethanol, and 0.5 part of glacial acetic acid by volume into a dry container and stir evenly to make solution B; ②, slowly add solution B to solution A, stir while adding, and dropwise complete Then continue to stir for about 30 minutes to form a stable sol, and age the sol for about 5 hours for use; ③. After putting the bamboo charcoal into the aged sol prepared in step ②, treat it under ultrasonic conditions with a frequency of 45KHz at 32°C for 1 hour to dilute the sol. The gel enters the internal pores of the bamboo charcoal, and then the bamboo charcoal is taken out and dried at 80°C; ④, the bamboo charcoal is taken out of the drying oven in step ③ and roasted in a tube furnace at 550°C for 3 hours in a nitrogen atmosphere ...

Embodiment 3

[0030] Example 3: 1. Add 1 part of butyl titanate and 3 parts of absolute ethanol by volume into a dry clean container and stir evenly to make A solution, then add 0.4 parts of nitric acid with a concentration of 0.21mol / L Add iron solution, 1 part of absolute ethanol, and 0.5 part of glacial acetic acid by volume into a dry container and stir evenly to make solution B; ②, slowly add solution B to solution A, stir while adding, and dropwise complete Then continue to stir for about 30 minutes to form a stable sol, and age the sol for about 5 hours for use; ③. After putting the bamboo charcoal into the aged sol prepared in step ②, treat it under ultrasonic conditions with a frequency of 45KHz at 32°C for 1 hour to dilute the sol. The gel enters the internal pores of the bamboo charcoal, and then the bamboo charcoal is taken out and dried at 80°C; ④, the bamboo charcoal is taken out of the drying oven in step ③ and roasted in a tube furnace at 550°C for 3 hours in a nitrogen atmos...

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Abstract

The invention discloses a modified nano TiO2/Ag/bamboo charcoal composite material and a method for killing microorganisms in medical sewage by virtue of the same. A preparation method of the composite material comprises the following steps of preparing stable modified TiO2 sol by a sol-gel method, performing ultrasonic treatment to enable titanium dioxide particles to enter internal pores of bamboo charcoal, and roasting to prepare the nano-level titanium dioxide which has photocatalytic activity and is loaded on the bamboo charcoal. According to the invention, very little hydrogen peroxide is added into the medical sewage with certain concentration to adjust the pH to 3-4, the composite material is added into the sewage (wherein the adding amount of the composite material is about 20g/L), and then the microorganisms in the medical sewage can be killed efficiently in the sunlight. After the sewage is treated in the sunlight for 10 minutes, the observation in a microscope shows that a good killing effect for the microorganisms in the medical sewage is obtained.

Description

technical field [0001] The invention relates to a modified nano TiO 2 / Ag / bamboo charcoal composite material and its method for killing microorganisms in medical sewage, specifically relating to a kind of TiO 2 / Ag / bamboo-charcoal composite material and the method of using the material to kill microorganisms in medical sewage under sunlight. Add a very small amount of hydrogen peroxide, TiO 2 The / Ag / bamboo charcoal composite material can produce hydroxyl radicals and silver ions in the sewage under sunlight to destroy the microbial cell structure, and can kill various microorganisms in the sewage, thereby treating medical wastewater at a very low cost. Background technique [0002] The source and composition of medical wastewater are very complex, containing a large number of pathogenic microorganisms, toxic and harmful physical and chemical pollutants, and having the characteristics of space pollution, acute infection, latent infection, etc. If it is discharged directly ...

Claims

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Application Information

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IPC IPC(8): B01J23/50C02F1/30C02F1/50C02F1/72
Inventor 黄英张伟吴海伟王潇雅赵阳邵杰
Owner NORTHWESTERN POLYTECHNICAL UNIV
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