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Method for treating wastewater of azo dye

A technology for wastewater treatment and azo dyes, which is used in energy wastewater treatment, light water/sewage treatment, mechanical oscillation water/sewage treatment, etc. The effect of large-scale application and cost reduction

Inactive Publication Date: 2006-12-06
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally, the combination of visible light and photocatalyst is used to treat organic pollutants, such as the combination of visible light and photocatalyst titanium dioxide to treat the dye Alizarin Red (Alizarin Red), but usually the cost of photocatalysts that can be excited by visible light is very expensive, so it is not suitable for large-scale industrial applications

Method used

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  • Method for treating wastewater of azo dye
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Effect test

Embodiment 1

[0026] Embodiment 1: This embodiment comprises the following steps:

[0027] (1) At room temperature, the concentration was 1.43×10 -4 The Acid Orange II wastewater solution of mol / L is put into the treatment tank, wherein Acid Orange II is a typical azo dye;

[0028] (2) The frequency of the ultrasonic wave generated by the ultrasonic generating device adopted is 1MHz, the electric power of the transducer is 40W, and the irradiation mode is irradiation from the bottom of the waste water treatment pool;

[0029] (3) A xenon lamp (0-300W) is used as a visible light source, and the average irradiated light power is 7.64mW / cm 2 , the irradiation method is that the light source is irradiated from the top of the treatment pool to the bottom;

[0030] (4) Simultaneously open the ultrasonic generating device and the visible light source, and jointly irradiate the azo dye wastewater with ultrasonic and light;

[0031] (5) Detect the decomposition result of the dye while treating th...

Embodiment 2

[0034] Embodiment 2: In this embodiment, two 20KHz, 150W ultrasonic transducers are used as ultrasonic sources instead of the ultrasonic transducers in Embodiment 1, and the irradiation method adopts the method of inserting the ultrasonic transducer tool head into the wastewater solution. Carry out the same steps in embodiment 1, obtain the result consistent with example 1.

Embodiment 3

[0035] Embodiment 3: A 20KHz, 150W ultrasonic transducer and a 1MHz, 40W ultrasonic transducer are used as the ultrasonic radiation source. The 20KHz ultrasonic transducer is irradiated by immersing the tool head in the wastewater solution, and the 1MHz, 40W ultrasonic transducer is irradiated from the bottom of the wastewater pool; the visible light source is combined with two xenon lamps with different irradiating light powers, one of which is The irradiation method adopts the irradiation method from the top to the bottom of the treatment pool, and the average irradiation light power is 7.64mW / cm 2 , another xenon lamp irradiation method is to irradiate from the side of the treatment pool to the solution, and the average irradiated light power is 3.80mW / cm 2. Carry out the same steps in embodiment 1, obtain the result consistent with example 1.

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Abstract

This invention discloses a method for treating azo-dye wastewater. The method comprises: (1) introducing azo-dye wastewater into a wastewater pool; (2) fixing an ultrasonic wave generator, and a visible light source; (3) opening the ultrasonic wave generator and the visible light source simultaneously, ultrasonicating and irradiating the azo-dye wastewater; (4) examming the dye decomposition result, and terminating the treatment when the decomposition reaches saturation. The method has such advantages as high decomposition rate, no toxic intermediates, low cost, no addition of other chemical substances, no pollution, and adequate utilization of ultrasonic wave energy.

Description

1. Technical field [0001] The invention relates to a novel low-energy-consumption and high-efficiency treatment method for azo dye wastewater with stable chemical properties, refractory degradation, potential carcinogenicity, and great impact on environmental pollution. 2. Background technology [0002] With the rapid development of the dye textile industry, the pollution of the surrounding ecological environment caused by the massive discharge of dye wastewater is becoming more and more serious. The color of dye wastewater is deep, the molecular structure is complex, and the wastewater is mostly strongly acidic or alkaline, which makes dye wastewater one of the most difficult organic industrial wastewater to treat. Among them, azo dyes are the most widely used in dyes. Among the more than 2,000 kinds of dyes currently on the market, nearly 2 / 3 are azo dyes. Azo dyes generally contain one or more aromatic ring structures with very stable properties, and are easy to decompos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/36C02F1/30
CPCY02W10/37
Inventor 刘晓峻马春莹许坚毅张海新徐峥
Owner NANJING UNIV
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