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Method for processing 3, 4-dichloroaniline in water

A technology for dichloroaniline and water treatment, applied in chemical instruments and methods, light water/sewage treatment, oxidized water/sewage treatment, etc., can solve problems such as low energy efficiency, high energy consumption, and restricted application range, and achieve The reactor equipment and operation are simple, energy consumption is reduced, and the effect of energy saving is achieved

Inactive Publication Date: 2009-10-21
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current plasma technology has problems such as low energy efficiency and high energy consumption, which restrict its application range.

Method used

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  • Method for processing 3, 4-dichloroaniline in water
  • Method for processing 3, 4-dichloroaniline in water
  • Method for processing 3, 4-dichloroaniline in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Put 150mL of 3,4-dichloroaniline water with a concentration of 30mg / L into the above-mentioned dielectric barrier discharge reactor containing photocatalyst titanium dioxide, mix well, and control the amount of titanium dioxide photocatalyst to 0mg / L and 10mg / L respectively , 20mg / L, 40mg / L. Adjust the air flow valve to control the aeration air intake to 1L / min, adjust the input excitation voltage and frequency of the voltage regulator so that the peak value of the discharge voltage is about 10kV, the peak value of the discharge current is 80mA, the discharge power is 80W, and the degradation treatment takes 4 minutes. Table 1 shows the treatment effect of different titanium dioxide photocatalyst mass concentrations on 3,4-dichloroaniline wastewater. It can be seen from Table 1 that in the presence of photocatalyst, the removal rate of 3,4-dichloroaniline is significantly improved, and it first increases and then decreases with the increase of the amount of photocatalys...

Embodiment 2

[0025] Same as Example 1, only the mass concentration of the photocatalyst titanium dioxide in Example 1 is controlled to be 20mg / L, and the discharge power is controlled to be 60W, 80W, and 100W respectively. Table 2 shows the treatment effect of different discharge powers on 3,4-dichloroaniline wastewater under the mass concentration of titanium dioxide photocatalyst 20mg / L. It can be seen from Table 2 that in the presence of a photocatalyst, a lower discharge power of 60W can achieve a higher removal rate of 3,4-dichloroaniline.

[0026] Table 2 The same photocatalyst TiO 2 Degradation rate of 3,4-dichloroaniline under different discharge powers

[0027]

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Abstract

The invention discloses a method for processing 3, 4-dichloroaniline in water. A high voltage electrode and a low voltage electrode are put in water body containing 3, 4-dichloroaniline to form a medium for resisting discharged electrodes, wherein the low voltage electrode contacts with water body to jointly form an earth electrode, the high voltage electrode connected with a power supply is separated from the water body by a medium of glass, air is introduced between the high voltage electrode and the medium of glass to form the medium for resisting discharge, thereby treating the water body; photocatalyst of titanium dioxide is added to the water body before the medium resists discharge, and ultraviolet light generated by plasma and photocatalyst can generate unique 'synergistic effect', thereby greatly improving degradation efficiency. The invention can effectively remove 3, 4-dichloroaniline component with biological toxicity in waste water for removing aniline. Compared with other plasma methods for resisting discharge by media, the invention has high degradation efficiency, short treatment time, small energy consumption, and simple and convenient devices of reactors and operation, etc.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a method for degrading 3,4-dichloroaniline in water. Background technique [0002] 3,4-Dichloroaniline is a commonly used chemical raw material. It is used in the synthesis of herbicides such as propanil, diuron, and rituron in pesticides. It can be used in the synthesis of disperse scarlet GA in dyes. It is used in the synthesis of dichlorobenzene in medicine. thiourea, etc. The groundwater and surface water are polluted by organic matter and their metabolites mainly because most of the phenylamide compounds are metabolized by microorganisms in the soil into halogenated anilines and their derivatives, such as: 3,4-dichloroaniline. 3,4-Dichloroaniline is a typical product produced by the metabolic degradation of soil microorganisms after herbicides such as Diuron, Riguron, and Propaniln are used in farmland. It is more toxic than the parent and is more frequently ...

Claims

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Application Information

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IPC IPC(8): C02F1/48C02F1/78C02F1/32C02F101/38
Inventor 郑正王卫平伦琳张继彪罗兴章冯景伟高顺枝邹星星罗艳王曦曦王正芳汪龙眠
Owner NANJING UNIV
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