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Method for degradation of triphenylmethane dye wastewater

A dye wastewater, triphenylmethane technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, neutralized water/sewage treatment, etc., can solve the problems of energy saving rather than degradation, low photon efficiency and high energy demand , to achieve the effect of low operating cost, high activity and simple equipment

Inactive Publication Date: 2010-06-30
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Photocatalytic oxidation technology needs to provide ultraviolet light and the problems of low light utilization rate and low photon quantum efficiency
Microwave-induced catalysis is restricted by site equipment, and it is currently difficult to apply it in practice.
In addition, the above-mentioned methods have relatively high energy requirements, and are not an ideal degradation method from the perspective of energy saving.

Method used

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  • Method for degradation of triphenylmethane dye wastewater
  • Method for degradation of triphenylmethane dye wastewater
  • Method for degradation of triphenylmethane dye wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Prepare a 20mg / L rhodamine B aqueous solution to simulate triphenylmethane dye wastewater, and measure 100mL of the dye solution into a reaction bottle. A stirring bar was placed in the bottle, and the solution was stirred under the action of the stirrer. Weigh 0.2 g of the prepared silver bismuthate and add it to the above solution, and start the reaction under the action of stirring. Then measure the variation of rhodamine B concentration with the reaction time, the experimental results show that after 20 minutes, the rhodamine B concentration reduces by 91%, see for details figure 2 .

Embodiment 2

[0029] Prepare a 30 mg / L malachite green aqueous solution to simulate triphenylmethane dye wastewater, and measure 100 mL of the dye solution into a reaction bottle. A stirring bar was placed in the bottle, and the solution was stirred under the action of the stirrer. Weigh 0.25 g of the prepared silver bismuthate and add it to the above solution, and start the reaction under the action of stirring. Then measure the variation of malachite green concentration with the reaction time, and the experimental results show that after 17 minutes, the concentration of malachite green reduces by 96%. For details, see image 3 .

Embodiment 3

[0031] Prepare a 40 mg / L crystal violet aqueous solution to simulate triphenylmethane dye wastewater, and measure 50 mL of the dye solution into a reaction bottle. A stirring bar was placed in the bottle, and the solution was stirred under the action of the stirrer. Weigh 0.2 g of the prepared silver bismuthate and add it into the above reaction solution. When the reaction starts, the variation of the concentration of crystal violet with the reaction time is measured, and the experimental results show that the decolorization rate of crystal violet exceeds 86% after 36 minutes.

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Abstract

The invention relates to a method for degradation of triphenylmethane dye wastewater, which belongs to the treatment method of dye wastewater, in particular to the treatment method of triphenylmethane dye wastewater. The method comprises the following steps: removing impurities in organic dye wastewater through a grid, lay the wastewater statically for precipitation, adjusting the pH value to 7-10; and leading pre-treated wastewater into a reaction vessel, adding silver bismuthate, making the mixture react under the condition with stirring, and discharging the wastewater after being treated. The silver bismuthate used in the invention is easily available, and the degradation of the triphenylmethane dye adopts a single oxidant, thereby simplifying the operation; and the reaction is elementary reaction, the composition of the oxidant is simple, the influence on the oxidant in the reaction process is lower than the influence on the complex oxidant, and the reaction process is more controllable, so that the reaction can achieve the optimal effect.

Description

technical field [0001] The invention relates to a treatment method for dye wastewater, in particular to a treatment method for triphenylmethane dye wastewater. Background technique [0002] Triphenylmethane dyes are the third most used dyes after azo dyes and anthraquinone dyes, and a large amount of waste water is generated during their production and use. The dye is a polybenzene ring compound, the main feature of its structure is that there are three benzene rings connected around the central carbon atom, and one of the benzene rings is connected with the carbon atom by a double bond. Some of the dyes and intermediate degradation products have been reported to have "three effects". Even if the concentration of residual dye components in dye wastewater is very low, if they are discharged into the water body, the light transmittance of the water body will decrease, resulting in the destruction of the water body ecosystem. Due to the high COD of this kind of dye, poor biod...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/72C02F1/66
Inventor 杨绍贵喻恺孙成陈泓哲邓月华刘本志
Owner NANJING UNIV
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