Method for degrading bisphenol A in wastewater by catalytic oxidation
A technology for catalytic oxidation and waste water, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc., can solve problems such as degradation efficiency reduction
Inactive Publication Date: 2009-06-17
HENAN POLYTECHNIC UNIV
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Problems solved by technology
However, there is a shortcoming in the Fenton reaction or Fenton-like reaction. It is strictly required that the acidity of the reaction system is between 2.8 and 4, otherwise the degradation efficiency will be greatly reduced.
At present, there is no practical and effective method that can degrade bisphenol A in wastewater.
Method used
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[0017] A. Experimental part:
[0018] 1), reagents and instruments:
[0019] Bisphenol A (BPA, 98%) was purchased from Bailingwei Company without any purification steps before use; trimethyl hydroxysulfur was purchased from Tokyo Kasi; sodium molybdate, sodium hydroxide, H 2 o 2 And various acids were purchased from Jiaozuo Chemical Reagent Company, Henan Province, with the minimum analytical purity.
[0020] High performance liquid chromatography (Agilent 1100), used to determine the concentration of BPA in the degradation system, is equipped with a binary pump, a 20 μL injection valve and an ultraviolet detector, and the detection wavelength is 254nm. The liquid chromatography column adopts XDB-C 18 Column (150×4.6 mm, particle size 5 μm), mobile phase is acetonitrile-water (adjust pH=4 with trifluoroacetic acid), filter with 0.45 μm PTFE membrane, degassed by ultrasonic, mobile phase is 60% acetonitrile-water.
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The invention discloses a method for catalytic and oxidative degradation of a bisphenol A in waste water. The method comprises the following steps: in a reaction system, adding a proper amount of the bisphenol A and a proper amount of tungstate WO4<2-> according to a bisphenol A to tungstate WO4<2-> molar ratio of 1:2; adjusting the pH value with NaHCO3 or NaOH to between 9 and 11; and adding an adequate amount of H2O2 and starting the reaction at 15 to 30 DEG C for 20 to 45 minutes under the catalytic action of the tungstate. Under an alkalescent condition, the H2O2 can degrade the biphenol in the waste water. Under a preset experiment condition, more than 95 percent of bisphenol A can be degraded within 40 minutes.
Description
Technical field: [0001] The invention relates to a degradation method, in particular to a method for catalytic oxidation degradation of bisphenol A in wastewater, which belongs to the field of chemical engineering. Background technique: [0002] Bisphenol A is 4,4-dihydroxydiphenylpropane (bisphenol A, referred to as BPA), is an important chemical raw material, widely used in the production of polycarbonate (PC), epoxy resin (EP) and other polymer materials . BPA is generally considered to be a relatively typical environmental endocrine disruptor, which can cause various diseases including cancer. At the same time, BPA has a toxic effect with a small dose and a long incubation period. Its harm is often expressed as a disaster to species and the ecological environment. sexual influence. The reported methods for degrading BPA include Fenton reaction method, electrochemical method and TiO 2 Photocatalytic oxidation methods, etc. Among them, the electrochemical method requir...
Claims
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IPC IPC(8): C02F1/72C02F1/58C02F101/34
Inventor 邰超董晶赵同谦徐华山周天健武俐邢梦林胡斌
Owner HENAN POLYTECHNIC UNIV