Environment-friendly aggregate with gas-liquid pollutant purifying function and preparation technology thereof

A preparation process and technology for pollutants, applied in the field of environment-friendly aggregate and its preparation process, can solve the problems of limited types of pollutants, difficult to maintain long-term activity, secondary pollution, etc., achieve obvious sound absorption effect, and improve photocatalysis. Efficiency, the effect of enhancing the purification capacity

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

AI Technical Summary

Problems solved by technology

[0004] Road air purification materials can effectively degrade pollutants such as automobile exhaust. Previous research mainly focused on the coating of photocatalytic materials on the surface of the road surface and the blending of road materials. difficult to maintain its long-acting activity
[0005] At present, in addition to centralized treatment in sewage treatment plants, there are mainly methods for treating water pollution, such as chemical agents, activated carbon adsorption, biofilm, artificial wetland, and microbial methods. The first method is likely to cause secondary pollution, and activated carbon adsorption can only absorb some pollutants. And only adsorption without degradation, the cost of the latter three is relatively high, and there are also great restrictions on the types of pollutants to be treated

Method used

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  • Environment-friendly aggregate with gas-liquid pollutant purifying function and preparation technology thereof
  • Environment-friendly aggregate with gas-liquid pollutant purifying function and preparation technology thereof
  • Environment-friendly aggregate with gas-liquid pollutant purifying function and preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Select grade 300 porous shale ceramsite (that is, aggregate), put it in an ultrasonic cleaner for ultrasonic cleaning (the power of the ultrasonic cleaner is 300W, and the cleaning time is 50 minutes), take it out after cleaning, and dry it at 105°C to obtain The ceramsite after cleaning; Weigh sodium hydroxide, dissolve in water, the preparation concentration is 10 -1 mol / L sodium hydroxide solution; weigh Degussa P25 (that is, the photocatalytic material is active TiO 2 ) into the sodium hydroxide solution prepared above, so that the concentration of Degussa P25 is 1g / L, ultrasonically disperse for half an hour to make it evenly dispersed, and obtain mixture A; take the cleaned ceramsite and place it in a vacuum water-saturated machine, pump Vacuum (vacuum degree is -0.094MPa), then inject mixture A, the amount of mixture A is subject to immersion ceramsite, vacuum negative pressure soak ceramsite for 24h; take out ceramsite, dry at 105°C for 6h, and then calcined at ...

Embodiment 2

[0041] Select 500-grade porous fly ash ceramsite (that is, aggregate), put it in an ultrasonic cleaner for ultrasonic cleaning (the power of the ultrasonic cleaner is 300W, and the cleaning time is 40 minutes), take it out after cleaning, and dry it at 105°C. Get the cleaned ceramsite; prepare an ammonia solution with a pH value of 10; weigh ZnO (that is, the photocatalytic material) and put it into the ammonia solution prepared above, so that the concentration of ZnO is 2g / L, and ultrasonically disperse it for half an hour to make it uniform Disperse, this mixture is named B; take the cleaned ceramsite and place it in a vacuum water saturation machine, vacuumize (vacuum degree is -0.098MPa), and then inject B, the amount of B is based on the ceramsite submerged, and the vacuum negative pressure Soak the ceramsite for 24 hours; take out the ceramsite, dry it at 105°C for 3h, and then calcinate it at 300°C for 3h (the heating rate is 5°C / min). Environmentally friendly ceramsite...

Embodiment 3

[0044] Select 700-grade porous clay ceramsite (that is, aggregate), put it in an ultrasonic cleaner for ultrasonic cleaning (the power of the ultrasonic cleaner is 300W, and the cleaning time is 30 minutes), take it out after cleaning, and dry it at 105°C to obtain a clean The final ceramsite; Weigh potassium hydroxide, dissolve it in water, and prepare a concentration of 10-4 mol / L potassium hydroxide solution; weigh WO 3 (that is, the photocatalytic material) is placed in the potassium hydroxide solution prepared above, so that the WO 3 The concentration is 5g / L, ultrasonically dispersed for half an hour to make it evenly dispersed, and this mixture is named C; take the cleaned ceramsite and place it in a vacuum water saturator, vacuumize (vacuum degree is -0.096MPa), and then inject C , the amount of C is subject to immersion ceramsite, vacuum negative pressure soak ceramsite for 24h; take out ceramsite, dry at 105°C for 4h, and then calcined at 450°C for 2h (heating rate i...

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Abstract

The invention belongs to the technical field of functional ceramics preparation, and particularly relates to environment-friendly aggregate with a gas-liquid pollutant purifying function and a preparation technology thereof. The environment-friendly aggregate with a gas-liquid pollutant purifying function is characterized by being prepared from photocatalysis material, alkaline solution and aggregate; the photocatalysis material and the alkaline solution are mixed to obtain a mixture; and the aggregate is soaked in the mixture and calcined to obtain the environment-friendly aggregate. The environment-friendly aggregate provided by the invention has lasting and efficient degradation effect on multiple organic and inorganic pollutants, is environment-friendly and has no secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional ceramics, and in particular relates to an environment-friendly aggregate with the function of purifying gas and liquid pollutants and a preparation process thereof. Background technique [0002] With the rapid development of my country's economy and urbanization, the problem of environmental pollution is becoming more and more serious. In air pollution, the pollution caused by motor vehicle emissions is particularly prominent. According to statistics, as of 2011, the total number of motor vehicles in my country has reached 220 million, and the total amount of motor vehicle emissions has exceeded 56 million tons, of which NO x , PM exceeds 85% of the total amount of such pollution in the atmosphere, and CH and CO exceed 70% of the total amount of such pollution in the atmosphere, which has brought great harm to human health and the urban environment. In addition to air pollution...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J35/10B01J21/06B01J23/06B01J23/30B01J23/22B01D53/94C02F1/30
Inventor 王发洲董跃杨露黄大凡李伟伦刘云鹏
Owner WUHAN UNIV OF TECH
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