Oxidation treatment method for organic pollutants based on sulfur-oxygen radicals

A technology of organic pollutants and sulfur-oxygen free radicals, which is applied in the direction of oxidizing water/sewage treatment, water pollutants, water/sewage treatment, etc., can solve the problems of large ratio of oxidant and catalyst, high cost, etc., and achieve good oxidation effect and reaction Fast, highly oxidizing effect

Active Publication Date: 2015-03-25
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Currently, sulfate free radicals (SO 4 ·- ) is mainly generated by the reaction of potassium persulfate and potassium peroxomonosulfate. However, ...

Method used

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  • Oxidation treatment method for organic pollutants based on sulfur-oxygen radicals
  • Oxidation treatment method for organic pollutants based on sulfur-oxygen radicals
  • Oxidation treatment method for organic pollutants based on sulfur-oxygen radicals

Examples

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Effect test

Embodiment 1

[0030] Prepare 400mL concentration of 8.6μM (2mg L -1 ) of bisphenol A solution, adding a concentration of 50mM MgSO 3 solution to form a mixed solution A, so that the MgSO in the mixed solution A 3 The concentration of the solution is 1 mM; quickly adjust the pH of the mixed solution A to about 11.4 with NaOH solution, add a magnet, and turn on the magnet stirrer. After that, quickly add Cu 2+ Solution (30mM, pH=2), forms mixed solution B, makes Cu in mixed solution B 2+The concentration is 0.1 mM, and the pH of the mixture B is 11.0 at this time. React under magnetic sub-stirring for 2 hours, the first hour before the reaction starts, take samples at intervals of 10 minutes, and one hour after the start of the reaction, take samples at intervals of 20 minutes, and the degradation efficiency of bisphenol A determined by liquid chromatography is 83%.

[0031] Similarly, the pH of the mixed liquid B was adjusted to 10.0, 9.0, and 8.0, and the degradation rates of bisphenol ...

Embodiment 2

[0033] Degradation of orange Ⅱ is a micro reaction, and the concentration of 50mL is 28.6μM (10mg L -1 ) of Orange II solution, add NaHSO with a concentration of 50mM 3 solution to form a mixed solution A, so that NaHSO in mixed solution A 3 The concentration of the solution is 1mM; adjust the pH of the mixed solution A to about 11.4 with NaOH solution; then take 3mL of the mixed solution A in a cuvette, and quickly add Cu 2+ Solution (30mM, pH=2), forms mixed solution B, makes Cu in mixed solution B 2+ The concentration is 0.1 mM, and the pH of the mixture B is 11.0 at this time. Continuous measurement was carried out with a fiber optic spectrometer. After 30 minutes of reaction, the degradation rate of Orange II was 84%.

Embodiment 3

[0035] Degradation of acid black is a micro reaction, and the concentration of 50mL is 16.2μM (10mg L -1 ) acidic black solution, adding a concentration of 50mM ZnSO 3 solution to form a mixed solution A, so that ZnSO in the mixed solution A 3 The concentration of the solution is 1mM, and the pH of the mixed solution A is adjusted to about 11.4 with NaOH solution; then take 3mL of the mixed solution A in a cuvette, and quickly add Cu 2+ Solution (30mM, pH=2), forms mixed solution B, makes Cu in mixed solution B 2+ The concentration is 0.1 mM, and the pH of the mixture B is 11.0 at this time. Continuous measurement was carried out with a fiber optic spectrometer, and after 30 minutes of reaction, the degradation rate of the acid black was 90%.

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Abstract

The invention discloses an oxidation treatment method for organic pollutants based on sulfur-oxygen radicals. Sulfites (including Na2SO3, K2SO3, (NH4)2SO3, NaHSO3, MgSO3, Al2(SO3)3, Fe2(SO3)3 and ZnSO3) are catalyzed by copper hydroxide colloid formed by copper ions or cuprous ions in an alkaline condition (the pH value is 8-11), and react to generate sulfur-oxygen radicals (including peroxosulfuric acid radical (SO5.-), sulfate radicals (SO4.-), and sulphurous acid radicals (SO3.-)), wherein the sulfate radicals react with hydroxyl ions (OH-) to generate hydroxyl radicals (HO.); and then pollutants in water are oxidized by using these sulfur-oxygen radicals and the hydroxyl radicals. Oxidants such as hydrogen peroxide and peroxysulphate are not required, so that the method is simple and convenient to operate, high in oxidation efficiency and high in speed, the pollutants can be oxidized under an anoxic condition, and therefore, the oxidation treatment method has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to an oxidation treatment method for organic pollutants based on sulfur and oxygen free radicals. Background technique [0002] With the continuous development of my country's economy, the types of industrial wastewater continue to increase, especially the wastewater produced by dye production and textile printing and dyeing industries, and various pollutants are increasingly harmful to the environment. Due to the high chroma, strong chemical stability and complex composition of dye wastewater, if it is directly discharged into the environment, it will seriously threaten the quality of the environment and human health. Therefore, the removal of organic pollutants in water has great theoretical and practical significance. [0003] At present, domestic dye wastewater often adopts a comprehensive treatment technology based on biological treatment, suppleme...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/74C02F101/30
CPCC02F1/725C02F2101/30C02F2101/308C02F2101/345
Inventor 吴峰袁亚男李进军
Owner WUHAN UNIV
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