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Method for processing rubber promoter production wastewater by photocatalysis

A technology of rubber accelerator and catalyst, applied in the field of rubber accelerator wastewater treatment, can solve the problems of complex biochemical treatment method, troublesome screening of dominant bacteria, high energy consumption, overcome the transfer of organic phase, avoid screening of bacterial species, and simple process Effect

Active Publication Date: 2012-01-11
KEMAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the production of rubber accelerators, a large amount of refractory heterocyclic organic matter is produced, which belongs to high-concentration and refractory organic wastewater. It has large molecular weight, high toxicity, and great harm to human beings. Therefore, it must be treated before it can be discharged. About There have been many relevant reports at home and abroad on the treatment methods of accelerator rubber industrial wastewater. At present, there are many representative treatment methods, mainly physical adsorption and biochemical treatment. These methods have played a great role in protecting the environment, but There are certain defects in these technologies. They cannot completely degrade organic pollutants completely, and are prone to secondary pollution and high energy consumption.
Literature (Industrial Water Treatment, 2007, 27 (2): 30) reported the method of activated carbon adsorption treatment of rubber accelerator wastewater. This method can only simply absorb organic pollutants from the liquid phase into the pores of activated carbon, and does not Complete degradation, prone to secondary pollution
Literature (Journal of Environment and Health, 2005, 22 (1): 28) has reported the treatment of rubber industry wastewater with high-efficiency dominant bacteria. The screening of high-efficiency dominant bacteria in this method is cumbersome, and microorganisms have certain effects on nutrients, pH value, and temperature conditions. Requirements, it is very difficult to simply use biochemical methods to treat chemical wastewater to meet the standards
[0003] Through the understanding of rubber accelerator wastewater treated by physical adsorption and biochemical methods, the industrial physical adsorption method cannot completely degrade organic matter, but transfers organic pollutants from one phase to another. Therefore, there is still a certain pollution to the environment, and the biochemical treatment method must be domesticated, enriched, screened, and cultivated in nature to screen out dominant bacteria, or to produce efficient strains through gene combination technology, in order to improve the system. The efficiency of biological treatment, the screening of dominant bacteria is a troublesome process, the biochemical treatment is more complicated, and the operation is not stable enough. Therefore, the development of high-efficiency, low-energy-consumption technologies that can completely degrade organic pollutants has always been the pursuit of environmental protection technology. The goal

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: under room temperature condition, take by weighing 10mg catalyst mesoporous titania nanoparticle, pore diameter is at 5~10nm particle, is placed in the quartz glass instrument that has tubular condenser in the middle, adds 100mL rubber accelerator waste water (COD= 800mg / L) to form a suspension, stir evenly, turn on the 365nm ultraviolet lamp for irradiation, during the reaction, feed condensed water to keep the reaction temperature at room temperature, after 100min of light, sample and centrifuge to ensure that the suspended catalyst is removed, and take the supernatant COD was measured, and the removal rate of COD was 70%.

Embodiment 2

[0012] Embodiment 2: under room temperature condition, take by weighing 20mg catalyst mesoporous titanium oxide nanoparticles, pore diameter is at 5~10nm particle, is placed in the quartz glass instrument that has tubular condenser in the middle, adds 100mL rubber accelerator waste water (COD= 1000mg / L) to form a suspension, stir evenly, turn on the 365nm ultraviolet lamp for irradiation, during the reaction, feed condensed water to keep the reaction temperature at room temperature, after 100min of light, sample and centrifuge to ensure that the suspended catalyst is removed, and take the supernatant COD was measured, and the removal rate of COD was 87%.

Embodiment 3

[0013] Embodiment 3: under room temperature condition, take by weighing 30mg catalyst mesoporous titania nanoparticles, pore diameter is at 5~10nm particle, is placed in the quartz glass instrument that has tubular condenser in the middle, adds 100mL rubber accelerator waste water (COD= 1000mg / L) to form a suspension, stir evenly, turn on 365nm, and irradiate with an ultraviolet lamp. During the reaction, condensed water is introduced to keep the reaction temperature constant. After 120min of light, the sample is centrifuged to ensure that the suspended catalyst is removed, and the supernatant is taken. COD was measured, and the removal rate of COD was 82%.

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Abstract

The invention provides a simple effective method for processing rubber promoter production wastewater, comprising the following steps of: a) putting the rubber promoter wastewater into a quartz glass apparatus with a tubular condenser tube at the center, weighing a catalyst titanium oxide, and putting into a reactor, wherein the addition of the catalyst is 0.1-0.5g / L of the amount of the rubber promoter wastewater; b) turning on a light source of an ultraviolet lamp, stirring with a magnetic stirrer, turning on condensed water, ensuring normal temperature during the reaction process; followed by illumination for 100-150 min, sampling, centrifuging, and taking a supernatant for the determination COD. The method provided by the invention has a simple technology, is easy to operate, and can be used to effectively and thoroughly decompose organic pollutants into inorganic substances CO2 and H2O small molecules with no secondary pollution; in addition, the adsorbed catalyst is immersed in acid at a certain concentration for a certain time, and can be regenerated and reused.

Description

technical field [0001] The invention relates to a method for treating rubber accelerator wastewater by using titanium oxide as a catalyst under ultraviolet light irradiation, and belongs to the technical field of rubber accelerator wastewater treatment. Background technique [0002] During the production of rubber accelerators, a large amount of refractory heterocyclic organic matter is produced, which belongs to high-concentration and refractory organic wastewater. It has large molecular weight, high toxicity, and great harm to human beings. Therefore, it must be treated before it can be discharged. About There have been many relevant reports at home and abroad on the treatment methods of accelerator rubber industrial wastewater. At present, there are many representative treatment methods, mainly physical adsorption and biochemical treatment. These methods have played a great role in protecting the environment, but There are certain defects in these technologies. They canno...

Claims

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Application Information

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IPC IPC(8): C02F1/32C02F1/72C02F103/38
Inventor 李霞
Owner KEMAI CHEM