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Method for degrading antibiotics by catalyzing hydrogen peroxide through aqueous phase transfer of ionic liquid

A technology of ionic liquid and hydrogen peroxide, which is applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc., can solve the problems of difficult recycling and low catalytic efficiency, and achieve complete degradation and low requirements for reaction conditions , the effect of broadening the variety

Pending Publication Date: 2021-08-31
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Zhang Biaojun et al. (Zhang Biaojun, Zhao Yaoyunchuan, Fang Qi, et al. Guangzhu-Ferrocene / H 2 o 2 Degradation of sulfamethazine in a heterogeneous system[J]. Environmental Science, 2018, 39(11):205-212.) Ferrocene was used as a catalyst to achieve the degradation of sulfamethazine under light conditions, but The reaction is carried out in a heterogeneous system, and the catalytic efficiency is not high, and it is difficult to recycle Fc after the reaction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1-octyl-3-methylimidazolium hexafluorophosphate (OMImPF 6 ) as ionic liquids (ILs) and poured into a quartz tube, ferrocene was selected as a catalyst and added into a quartz tube, magnetically stirred at room temperature for 30 minutes to form an ionic liquid phase, in which the concentration of the catalyst was 25 mmol / L; the sulfamethoxazole ( SMX) wastewater and 3% H 2 o 2 Pour into a volumetric flask, add deionized water to constant volume and adjust the pH to 3 to form an aqueous phase, wherein the concentration of sulfamethoxazole is 0.05mmol / L, H 2 o 2 The concentration was 10mmol / L; 50mL of water phase and 5mL of ionic liquid phase were mixed and stirred at room temperature for 30min, and after standing for 10min, the upper water sample was taken for chromatographic analysis. The degradation efficiency of sulfamethoxazole in the water phase was measured to be 97.2%.

Embodiment 2

[0025] 1-octyl-3-methylimidazolium hexafluorophosphate (OMImPF 6 ) as ionic liquids (ILs) and poured into a quartz tube, ferrocene was selected as a catalyst and added into a quartz tube, magnetically stirred at room temperature for 30 minutes to form an ionic liquid phase, in which the concentration of the catalyst was 50 mmol / L; the sulfamethoxazole ( SMX) wastewater and 3% H 2 o 2 Pour into a volumetric flask, add deionized water to constant volume and adjust the pH to 5 to form an aqueous phase, wherein the concentration of sulfamethoxazole is 0.2mmol / L, H 2 o 2 The concentration was 30mmol / L; 50mL aqueous phase and 5mL ionic liquid phase were mixed and stirred at room temperature for 5h, and after standing for 10min, the upper water sample was taken for chromatographic analysis. The degradation efficiency of sulfamethoxazole in the aqueous phase was measured to be 84.6%.

Embodiment 3

[0027] 1-octyl-3-methylimidazolium hexafluorophosphate (OMImPF 6 ) as ionic liquids (ILs) and poured into a quartz tube, ferrocene was selected as a catalyst and added into a quartz tube, and magnetically stirred at room temperature for 30 minutes to form an ionic liquid phase, in which the concentration of the catalyst was 35 mmol / L; the sulfamethoxazole ( SMX) wastewater and 3% H 2 o 2 Pour into a volumetric flask, add deionized water to constant volume and adjust the pH to 4 to form an aqueous phase, wherein the concentration of sulfamethoxazole is 0.125mmol / L, H 2 o 2 The concentration was 20mmol / L; 50mL aqueous phase and 5mL ionic liquid phase were mixed and stirred at room temperature for 5h, and after standing for 10min, the upper water sample was taken for chromatographic analysis. The degradation efficiency of sulfamethoxazole in the aqueous phase was measured to be 91.6%.

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Abstract

The invention discloses a method for degrading antibiotics by catalyzing hydrogen peroxide through aqueous phase transfer of ionic liquid, which comprises the following steps: hydrogen peroxide is added into wastewater containing antibiotics, and the pH value of the system is adjusted to 3-4 to form an aqueous phase; a catalyst is added into the ionic liquid insoluble in water and stirred to form an ionic liquid phase, and the catalyst is ferrocene, ferric dodecyl sulfate, ferrous dodecyl sulfate or copper dodecyl sulfate; and the water phase and the ionic liquid phase are mixed and stirred according to the volume ratio of (8-11): 1 for reaction to degrade the antibiotics. The method has the advantages of simple process, efficient reaction, low reaction condition requirement, thorough degradation, no secondary pollution, energy conservation, environmental protection and wide antibiotic treatment range, the ionic liquid and the catalyst can be repeatedly used, the cost is remarkably reduced, and the method has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of antibiotic wastewater treatment, and in particular relates to a method for catalyzing hydrogen peroxide to degrade antibiotics by ionic liquid water phase transfer. Background technique [0002] Antibiotics are a type of environmental micro-pollutants that are often detected in wastewater and surface water bodies. They are highly polar and non-volatile substances. Great changes in water quality have made aquatic organisms unable to survive and destroyed the water ecosystem, thereby affecting the normal production and life of people near the water basin. Advanced oxidation technology can convert these pollutants into small molecular acids that are more biodegradable, and then mineralized into CO 2 and H 2 O and other harmless substances, therefore, the application of advanced oxidation technology in the treatment of organic polluted wastewater is very common. [0003] Photoassist-homogeneous Fenton (Fe ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F101/34C02F101/38
CPCC02F1/722C02F1/725C02F2305/023C02F2101/38C02F2101/40C02F2101/34C02F1/66C02F2103/343C07F15/02C07F17/02
Inventor 李英杰侯茂泽屠依娜田森林刘华英赵群
Owner KUNMING UNIV OF SCI & TECH
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