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A method for degrading printing and dyeing wastewater by anthraquinones

A technology for printing and dyeing wastewater and anthraquinone, which is applied in chemical instruments and methods, textile industry wastewater treatment, special compound water treatment, etc., can solve problems such as increased hydrogen peroxide concentration, high operating costs, and ozone instability, and achieves The effect of simple process flow, avoiding secondary pollution, and wide application prospects

Active Publication Date: 2018-01-12
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When chlorine is used as an oxidant, it is easy to produce harmful substances such as carcinogenic chloroform
When ozone is used as an oxidant, the investment of the ozone generator is large, the operating cost is high, and the ozone is unstable
When hydrogen peroxide is used as an oxidant, the temperature exceeds 80°C, and the peroxidant is basically decomposed instead of participating in the reaction. If it is not consumed by the reaction, the addition of hydrogen peroxide will increase the concentration of hydrogen peroxide in the reactor, and there is a risk of explosion.
When permanganate is used as an oxidizing agent, such as potassium permanganate, while oxidation occurs, manganese dioxide is reduced to form. If excessive dosage is added, the treated water will have color, and the dosage is difficult to control

Method used

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  • A method for degrading printing and dyeing wastewater by anthraquinones
  • A method for degrading printing and dyeing wastewater by anthraquinones
  • A method for degrading printing and dyeing wastewater by anthraquinones

Examples

Experimental program
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Effect test

Embodiment 1

[0031] This embodiment provides a method for degrading printing and dyeing wastewater by anthraquinones, which specifically includes the following steps:

[0032] Step 1, in the rhodamine B printing and dyeing wastewater of 0.02mmol / L, add 2-sodium anthraquinone sulfonate (AQS), the concentration of 2-sodium anthraquinone sulfonate (AQS) in wastewater is respectively 0mmol / L, 0.01 mmol / L, 0.03mmol / L, 0.05mmol / L, 0.10mmol / L and 0.15mmol / L, and adjust the pH value to 2 with dilute sulfuric acid;

[0033] Step 2: Stir with a mechanical electronic stirrer, keep the rotation speed constant, the temperature is 30° C., and the reaction time is 300 min. detected figure 1 The data:

[0034] figure 1 is the degradation characteristics of Rhodamine B by AQS under different concentration conditions, from figure 1 It can be seen that when the concentration of AQS is 0mmol / L, 0.01mmol / L, 0.03mmol / L, 0.05mmol / L, 0.10mmol / L and 0.15mmol / L, the degradation rate of Rhodamine B is 0, 10 %, ...

Embodiment 2

[0036] This embodiment provides a method for degrading printing and dyeing wastewater by anthraquinones, which specifically includes the following steps:

[0037] Step 1, in the rhodamine B waste water of 0.02mmol / L, add 2-sodium anthraquinone sulfonate (AQS), the concentration of 2-sodium anthraquinone sulfonate (AQS) in waste water is 0.10mmol / L, then use dilute H 2 SO 4 and NaOH to adjust the pH of each system to be 2, 3, 3.5, 3.7, 3.8, 3.9, 4, 5.75 (no pH adjustment), 7 and 10;

[0038] Step 2: Stir with a mechanical electronic stirrer, keep the rotation speed constant, the temperature is 30° C., and the reaction time is 300 min.

[0039] detected figure 2 The data, figure 2 is the degradation characteristics of Rhodamine B by AQS under different pH conditions, from figure 2 It can be known in the figure that when the concentration of AQS is a fixed value of 0.10mmol / L, and the pH is respectively 2, 3, 3.5, 3.7, 3.8, 3.9, 4, 5.75 (do not adjust the pH), 7 and 10, t...

Embodiment 3

[0053] This embodiment provides a method for degrading printing and dyeing wastewater by anthraquinones, which specifically includes the following steps:

[0054] Step 1, in the rhodamine B waste water of 0.02mmol / L, add 2,6-sodium anthraquinone disulfonate (AQDS), the concentration of 2,6-sodium anthraquinone disulfonate (AQDS) in waste water is respectively 0mmol / L, 0.01mmol / L, 0.03mmol / L, 0.05mmol / L, 0.10mmol / L and 0.15mmol / L, and adjust the pH to 2 with dilute sulfuric acid;

[0055] Step 2: Stir with a mechanical electronic stirrer, keep the rotation speed constant, the temperature is 30° C., and the reaction time is 300 min.

[0056] detected Figure 4 The data, Figure 4 is the degradation characteristic of AQDS to rhodamine B under different concentration conditions, from Figure 4 It can be seen that when the concentration of AQS is 0mmol / L, 0.01mmol / L, 0.03mmol / L, 0.05mmol / L, 0.10mmol / L and 0.15mmol / L, the degradation rates of Rhodamine B are 0, 86 %, 96%, 97%, 1...

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Abstract

The invention provides a method for degrading printing and dyeing wastewater by anthraquinone substances. In the method, anthraquinone substances are added to the printing and dyeing wastewater, mixed uniformly to form a degradation system, and left to degrade. The anthraquinones are sodium anthraquinone 2-sulfonate (AQS) or sodium 2,6-anthraquinone disulfonate (AQDS). The degradation system is an acidic environment. The degradation system is normal temperature. The concentration of the anthraquinones in the degradation system is 0.01-0.15 mmol / L. The method of the present invention can effectively degrade printing and dyeing wastewater without using oxidants such as persulfate, permanganate and hydrogen peroxide, while the existing advanced oxidation technology needs to add oxidants, high energy consumption, harsh conditions, and oxidants The amount used is too large and the treatment cost is high, but the method of the present application avoids these problems, overcomes the technical prejudice of those skilled in the art that the degradation of printing and dyeing wastewater requires the addition of oxidants, and achieves unexpected technical effects.

Description

technical field [0001] The invention belongs to the field of organic wastewater treatment and relates to the treatment of printing and dyeing wastewater, in particular to a method for degrading printing and dyeing wastewater by anthraquinone substances. Background technique [0002] In recent decades, with the rapid development of the national economy and industry, the environmental pollution and energy crisis have become increasingly serious. Environmental pollution has become a global problem affecting human survival and sustainable development. Among them, water resources, which human beings depend on Pollution is particularly prominent, and the consequences are particularly serious. Therefore, water pollution is one of the urgent problems faced by all countries in the world. [0003] Dye wastewater has the characteristics of large water volume, wide distribution, large changes in water quality, high toxicity of organic matter, complex components, and refractory degradat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F103/30
CPCC02F1/72C02F2103/30C02F2305/02
Inventor 朱维晃刘文奇王宏伟杨瑞
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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