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A method for degrading organic pollutants by activating persulfate with carbonized polyaniline

A technology for activating persulfate and organic pollutants, used in water pollutants, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve problems such as complex equipment systems, avoid high energy consumption, improve degradation effect, Effects of excellent surface activity and electron transport efficiency

Active Publication Date: 2022-02-08
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Common persulfate activation methods include heat treatment, microwave radiation, ultraviolet radiation, ultrasonic coupling, etc. However, the above methods require additional energy, and their equipment systems are more complicated

Method used

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  • A method for degrading organic pollutants by activating persulfate with carbonized polyaniline
  • A method for degrading organic pollutants by activating persulfate with carbonized polyaniline
  • A method for degrading organic pollutants by activating persulfate with carbonized polyaniline

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preparation example Construction

[0036] In the present invention, the preparation method of said carbonized polyaniline preferably comprises the following steps:

[0037] mixing aniline, hydrochloric acid aqueous solution and ammonium persulfate aqueous solution to carry out polymerization reaction to obtain polyaniline;

[0038] Under a protective atmosphere, the polyaniline is carbonized and then cooled to obtain carbonized polyaniline; the carbonization temperature is 700-1000° C., and the heating rate to the carbonization temperature is 1-5° C. / min.

[0039] The invention mixes aniline, hydrochloric acid aqueous solution and ammonium persulfate aqueous solution to carry out polymerization reaction to obtain polyaniline. In the present invention, the purity of the aniline is preferably ≥99.5%, and the aniline is preferably commercially available analytically pure aniline (with a concentration of 0.018 mol). In the present invention, the molar concentration of the hydrochloric acid aqueous solution is pref...

Embodiment 1

[0049] (1) According to the molar ratio of aniline and hydrochloric acid 1:2, 1.6mL of aniline (0.018mol, analytically pure, purity ≥ 99.5%) was dissolved in 100mL of 360mM hydrochloric acid aqueous solution and stirred for 0.5h as a monomer solution, and the obtained monomer solution was placed at 0 In an ice bath below ℃, add 100mL ammonium persulfate aqueous solution (180mM) according to the molar ratio of ammonium persulfate and aniline 1:1, and carry out the polymerization reaction for 4h; Wash the filter cake alternately with ultrapure water until the filtered solution is colorless; collect the solid, and then dry it in a vacuum oven at 60°C for 24 hours to obtain polyaniline;

[0050] (2) Place the polyaniline in a tube furnace, heat up to 900°C at a rate of 5°C / min under a nitrogen atmosphere, perform carbonization treatment for 4 hours, cool to room temperature at a rate of 1°C / min, and grind When the particle size reaches 350nm, carbonized polyaniline is obtained, wh...

Embodiment 2

[0053] The CPANI-9 obtained in Example 1 was added to 197 mL of an aqueous solution containing 2 mg / L sulfamethoxone, 197 mL of an aqueous solution containing 2 mg / L bezafibrate, and 197 mL of 2 mg / L ibuprofen at a concentration of 25 mg / L. In the aqueous solution, add 3mL potassium persulfate aqueous solution (10g / L) respectively in each aqueous solution sample again, the concentration of potassium persulfate in the gained reaction solution is 150mg / L, the pH of reaction solution is adjusted to 7 with NaOH , carry out degradation, and finally take samples and filter at regular intervals, and obtain the concentration of organic matter at a certain time through high-performance liquid chromatography detection.

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Abstract

The invention relates to the technical field of sewage advanced treatment, and provides a method for degrading organic pollutants by activating persulfate with carbonized polyaniline. According to the invention, persulfate and carbonized polyaniline are added to organic pollutant waste water to be treated to obtain a mixture; the pH value of the mixture is adjusted to 6.5-7.5 for degradation treatment. In the carbonized polyaniline provided by the invention, the surface activity and electron transport efficiency of the carbonized polyaniline are improved due to the doping of nitrogen atoms, and the electron-donating characteristics of the material and the binding energy with the guest molecule are enhanced, so that it can activate persulfate and improve pollution. degradation effect. The present invention uses carbonized polyaniline to activate persulfate and then uses it to degrade organic pollutants, which can effectively avoid the problems of high energy consumption and secondary pollution in the traditional persulfate activation method.

Description

technical field [0001] The invention relates to the technical field of advanced sewage treatment, in particular to a method for degrading organic pollutants by activating persulfate with carbonized polyaniline. Background technique [0002] In recent years, a large number of toxic and harmful organic pollutants such as phenolic substances, dyes and antibiotics have entered the water environment, bringing potential environmental risks. For the effective control and removal of these organic pollutants, advanced oxidation technology has great advantages. [0003] The advanced oxidation method based on persulfate activation is a research hotspot in recent years and has a good application prospect. After persulfate is activated, a variety of highly active species are produced, including hydroxyl radicals (OH ), sulfate radicals (SO 4 ·- ), singlet oxygen ( 1 o 2 ), etc., can efficiently degrade organic pollutants. Common persulfate activation methods include heat treatment,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F9/04C02F101/30
CPCC02F1/72C02F1/66C02F2101/30C02F2305/026
Inventor 刘永泽刘世奇张立秋江进封莉杜子文付婧懿
Owner BEIJING FORESTRY UNIVERSITY
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