Method for treating bisphenol A-containing wastewater

A treatment method, wastewater technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of incomplete degradation of bisphenol A, insufficient effect, complicated process, etc. Achieve the effect of good treatment effect, obvious removal effect and simple operation

Inactive Publication Date: 2011-02-02
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods all have practical problems such as complex process, high cost, high energy consumption, and insufficient effect to varying degrees, and the degradation of bisphenol A is not complete, so that the water still has a low concentration of bisphenol A residue, making it in the bisphenol A containing The application of phenol A in wastewater treatment is limited

Method used

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  • Method for treating bisphenol A-containing wastewater
  • Method for treating bisphenol A-containing wastewater
  • Method for treating bisphenol A-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: The influence of the dosage of aluminum powder on the degradation rate of bisphenol A

[0019] The treatment object is wastewater containing bisphenol A concentration of 2.0mg / L, firstly use HNO 3 Adjust the pH to 2.5, then add aluminum powder according to different dosages, carry out the treatment at 25°C under constant stirring, measure the remaining percentage of bisphenol A in the wastewater every 2 hours, the results are shown in figure 1 .

[0020] It can be seen from the figure that the degradation efficiency of bisphenol A increases with the increase of the dosage of aluminum powder. With the dosage of 4g / L aluminum powder, the degradation rate of bisphenol A can reach more than 75% after 12 hours of treatment.

Embodiment 2

[0021] Embodiment 2: The influence of initial pH value on bisphenol A degradation rate

[0022] The treatment object is wastewater containing bisphenol A concentration of 2.0mg / L, firstly use HNO 3 Adjust the pH to different initial pH values, then add aluminum powder according to the dosage of 4g / L wastewater, and process it at 25°C under constant stirring, and measure the remaining percentage of bisphenol A in the wastewater every 2 hours. The results are shown in figure 2 .

[0023] It can be seen from the figure that the lower the initial pH, the better the degradation effect of bisphenol A. When the initial pH is 1.5, the degradation rate of bisphenol A can reach about 80% after 12 hours of treatment.

Embodiment 3

[0024] Embodiment 3: the influence of temperature on bisphenol A degradation rate

[0025] The treatment object is wastewater containing bisphenol A concentration of 2.0mg / L, firstly use HNO 3 Adjust the pH to 2.5, then add aluminum powder according to the dosage of 4g / L waste water, carry out treatment at different temperatures under constant stirring, measure the remaining percentage of bisphenol A in the waste water every 2 hours, the results are shown in image 3 .

[0026] It can be seen from the figure that the higher the treatment temperature, the better the degradation effect of bisphenol A. When the treatment temperature is 35°C, the degradation rate of bisphenol A can reach more than 75% after 12 hours of treatment.

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Abstract

The invention provides a method for treating bisphenol A-containing wastewater. The method comprises the following steps of: adjusting pH of the bisphenol A-containing wastewater to be less than 3.5 with acid; adding 1 to 10g of aluminum powder into every liter of wastewater; and reacting the mixture at the temperature of between 20 and 40 DEG C under the condition of stirring or auxiliary aeration for 4 to 12 hours to obtain the treated wastewater. The method has the main advantages that: the method is used for treating the bisphenol A-containing wastewater, the removal effect is obvious and the removal rate of the bisphenol A is over 95 percent within 8 hours under the conditions that the reaction temperature is 25 DEG C, the initial pH is 1.5, bisphenol A concentration is 2.0mg/L and aluminum powder content is 4.0g/L; in addition, if the temperature is raised, the removal rate is obviously enhanced. The method is simple to operate, and has the advantages of low cost, low energy consumption, good treatment effect and the like.

Description

(1) Technical field [0001] The invention relates to a method for treating bisphenol A-containing wastewater. (2) Background technology [0002] Bisphenol A is a common name for 2,2-(4-hydroxyphenyl)propane, also known as diphenol-based propane. It is synthesized by phenol and acetone in acid medium, and is an important raw material for epoxy resin, polycarbonate, polysulfone, polyarylate, phenolic resin, unsaturated polyester resin, flame retardant and other products. [0003] With the rapid growth of my country's economy and the wide application of materials such as polycarbonate plastics and epoxy resins, the pollution of bisphenol A has become increasingly serious. At present, most of the wastewater treatment adopts chemical method, activated sludge method and microbial biochemical method. These methods all have practical problems such as complex process, high cost, high energy consumption, and insufficient effect to varying degrees, and the degradation of bisphenol A i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F101/34C02F9/04
Inventor 林坤德刘万鹏
Owner ZHEJIANG UNIV OF TECH
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