Method for rapid degradation of triphenylmethane dye waste water

A technology for triphenylmethane and dye wastewater, which is applied in chemical instruments and methods, textile industry wastewater treatment, water pollutants, etc., can solve the problems of high energy demand and complex reaction equipment requirements, and achieves strong applicability and operating costs. Low, inexpensive effect

Inactive Publication Date: 2011-07-20
NANJING UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] In view of the existing process for treating triphenylmethane dye wastewater with relatively high energy requirements and complex requirements for reaction equipment, the present invention provides a method for rapidly degrading triphenylmethane dye wastewater, using sodium bismuthate and nitric acid The method of degrading triphenylmethane dye wastewater under the combined action of silver, adding two chemical reagents to degrade triphenylmethane dye wastewater under the condition of stirring, makes the equipment used in the degradation method simple, energy consumption is small, easy to operate, no need for light and No secondary pollution, can achieve the goal of decolorization, degradation and removal of dyes in a short time

Method used

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  • Method for rapid degradation of triphenylmethane dye waste water
  • Method for rapid degradation of triphenylmethane dye waste water
  • Method for rapid degradation of triphenylmethane dye waste water

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Prepare 20mg / L rhodamine B aqueous solution to simulate dye wastewater, and measure 100mL dye solution into the reaction bottle. A stirring bar was placed in the bottle, and the solution was stirred under the action of the stirrer. Weigh 200mg NaBiO 3 and 50mg AgNO 3 Add the above solution and start the reaction under the action of stirring. Subsequently, the variation of rhodamine B concentration with the reaction time was measured, and the experimental results showed that within 14 minutes, the concentration of rhodamine B decreased by 99%, and after 15 minutes, TOC decreased by 54%. For details, see figure 1 .

Embodiment 2

[0029] Prepare a 20mg / L malachite green aqueous solution to simulate dye wastewater, and measure 50mL 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 100mg NaBiO 3 and 200mg AgNO 3 Add the above reaction solution. When the reaction starts, the concentration of malachite green changes with the reaction time. The experimental results show that the decolorization rate of malachite green exceeds 95% within 8 minutes, and the TOC drops by 21% after 15 minutes. For details, see figure 2 .

Embodiment 3

[0031] Prepare 40 mg / L methyl violet aqueous solution to simulate dye wastewater, and measure 100 mL of 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 300mg NaBiO 3 and 100mg AgNO 3 Add the above solution and start the reaction under the action of stirring. Subsequently, the change of the concentration of methyl violet with the reaction time was measured. The experimental results showed that the concentration of methyl violet decreased by 92% within 4 minutes, and the TOC decreased by 75% after 15 minutes. For details, see image 3 .

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Abstract

The invention discloses a method for rapid degradation of triphenylmethane dye waste water. The method firstly removes impurities by a grill, stands for precipitation and regulates pH, wherein, the pHvalue of the triphenylmethane dye waste water is controlled to be about 7-10; the waste water is introduced into a simple reaction container, then a mixture consisting of sodium bismuthate and silvernitrate is added, the multi-phase uniform mixing reaction is kept under the action of stirring, the temperature of the dye waste water during the process is kept at room temperature, the pressure isnormal pressure, and the waste water is discharged. The treatment method can high-efficiently degrade triphenylmethane dye which is typically difficult to biodegrade, the catalytic reaction can be realized without the use of any light source or other external energy, such as microwave and the like, and the treatment method has very low requirements on equipment, less energy consumption, low operation cost, convenient operation and no secondary pollution, thereby being the method which can realize the degradation at the room temperature.

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] With the development of printing and dyeing and dyeing industry, production wastewater has become one of the main sources of water pollution. Dyestuff is an important source of environmental pollution that exists in large quantities, and its annual output in the world is about 800,000 to 900,000 tons. The annual output of dyestuffs in my country reaches 150,000 tons, ranking among the top in the world. In the production and use of dyes, about 10% to 15% of dyes are discharged into the environment with wastewater. my country's dye industry and textile printing and dyeing industry are developed, and the pollution of dye wastewater to the environment is more serious. According to the data in the 1998 Environmental Bulletin, the current treatment rate of industrial wastewater in my country...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/66C02F1/72C02F103/30C02F101/30
Inventor 杨绍贵喻恺孙成何欢秦超郭会琴
Owner NANJING UNIV
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