One-step synthetic method to prepare fe 3 o 4 /Mesoporous carbon composite material and method for catalytic oxidation degradation of sulfamethazine

A sulfamethazine, composite material technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as easy agglomeration, and achieve enhanced adsorption. Degradation, prolonging the activity period, improving the effect of biodegradability

Active Publication Date: 2021-08-27
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the invention is to address the deficiencies of the existing homogeneous catalytic reactions, Fe 3 o 4 In view of technical problems such as easy agglomeration, mesoporous carbon has a large specific surface area, a large adsorption capacity for macromolecules, and can enhance the mass transfer reaction process, etc., a one-step method for preparing Fe 3 o 4 / Mesoporous carbon composite material and method for activating persulfate to generate sulfate radicals to degrade sulfamethazine

Method used

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  • One-step synthetic method to prepare fe <sub>3</sub> o <sub>4</sub> /Mesoporous carbon composite material and method for catalytic oxidation degradation of sulfamethazine
  • One-step synthetic method to prepare fe <sub>3</sub> o <sub>4</sub> /Mesoporous carbon composite material and method for catalytic oxidation degradation of sulfamethazine
  • One-step synthetic method to prepare fe <sub>3</sub> o <sub>4</sub> /Mesoporous carbon composite material and method for catalytic oxidation degradation of sulfamethazine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In this example, the Fe 3 o 4 / Mesoporous carbon composites adsorption efficiency of sulfamethazine under different material dosage.

[0032] (1) FeCl with a molar ratio of 2:1 3 ·6H 2 O and FeCl 2 4H 2 O (where FeCl 3 ·6H 2 O take 21.64g, FeCl 2 4H2 O take 7.96g) with anaerobic water to dissolve the 100mL volumetric flask. At room temperature, 0.9mol·L -1 The ammonia water was added dropwise to the above-mentioned iron salt mixture, stirred vigorously while adding, and protected by nitrogen gas. Add ammonia water dropwise until the pH is about 9.0, the amount of ammonia water is about 700mL, keep nitrogen flowing and stir for 30min, then settle for 30min, pour off the supernatant, wash with anaerobic water three times to make the pH near neutral, and then use a centrifuge (3000rpm ) centrifuged for 10min, the supernatant was poured off, and the product was put into a constant temperature drying oven and dried at 95°C to obtain Fe 3 o 4 .

[0033] (2) Fe p...

Embodiment 2

[0040] This example compares different Fe 3 o 4 The effect of activated sodium persulfate on the removal rate of sulfamethazine under the condition of the dosage of mesoporous carbon composite materials.

[0041] The Fe involved in this example 3 o 4 The preparation method of the mesoporous carbon composite material is the same as that in Example 1.

[0042] Using the prepared Fe 3 o 4 / Mesoporous carbon composite material is the catalyst, and its dosage is 0.0696, 0.1392, 0.2088, 0.2784 and 0.3480g, which are respectively recorded as system 1, 2, 3, 4 and 5; sulfamethazine is the target pollutant, and its The initial concentration of the aqueous solution is 50mg / L, the volume is 100mL; the mass of sodium persulfate is 0.0476g, the reaction temperature is 30°C, the pH is not adjusted, and the conical flask is used as the reactor. Place it in a constant temperature oscillator and vibrate for a certain period of time, take samples at 15, 30, 45, 60, 75 and 90 minutes respe...

Embodiment 3

[0048] This embodiment compares the influence of different qualities of the oxidizing agent sodium persulfate on the degradation rate of sulfamethazine.

[0049] The Fe involved in this example 3 o 4 The preparation method of the mesoporous carbon composite material is the same as that in Example 1.

[0050] Using the prepared Fe 3 o 4 / Mesoporous carbon composite material is catalyst, and its dosage is 0.1392g, and sulfamethazine is target pollutant, and the initial concentration of its aqueous solution is 50mg / L, and volume is 100mL; The mass of sodium persulfate is respectively 0, 0.0119, 0.0238, 0.0476, 0.0714, 0.1190g, respectively recorded as systems 1, 2, 3, 4, 5 and 6; the reaction temperature is 30°C, the pH is not adjusted, and the conical flask is used as the reactor. Place it in a constant temperature oscillator and vibrate for a certain period of time, take samples at 15, 30, 45, 60, 75 and 90 minutes respectively, and measure the concentration of the supernat...

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Abstract

The invention discloses a one-step synthesis method for preparing Fe 3 o 4 / Mesoporous carbon composite material and its application to activate persulfate to generate sulfate radical to degrade sulfamethazine. Fe 3 o 4 / Mesoporous carbon composites are prepared by a one-step synthesis method, which utilizes the large specific surface area and more pore structure of mesoporous carbon to efficiently and uniformly load Fe 3 o 4 . The method utilizes the synergistic effect of adsorption and catalysis of the prepared composite material to efficiently and continuously activate persulfate to generate sulfate radicals to degrade sulfamethazine and enhance its degradation effect. The composite material of the invention has strong stability and can still maintain high activity after repeated recycling. Using the method of the present invention to treat sulfonamide antibiotic wastewater that is difficult to biodegrade, especially antibiotic wastewater containing sulfamethazine, can improve its biodegradability, and has the advantages of simple and feasible operation steps, environmental friendliness, high catalytic activity and recyclability Good and other advantages, has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of catalytic oxidation treatment of a typical sulfonamide antibiotic-sulfamethazine, and specifically relates to the preparation of Fe by a one-step synthesis method. 3 o 4 / Mesoporous carbon composite material and method for degrading sulfamethazine by activating persulfate to generate sulfate radical radicals. Background technique [0002] At present, the large amount of antibiotics in the ecological environment has become the focus of attention, and many countries have detected different levels of antibiotic residues in the effluent of sewage treatment plants. The most frequently detected antibiotics in the world are sulfonamides and quinolones. The maximum concentrations of the five sulfonamides in urban sewage in my country are all above 1500ng / L. A large number of antibiotics will bring potential harm to various organisms in the sea and on land, and reducing their pollution levels in the environment ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745C02F1/72C02F101/38
CPCB01J23/745C02F1/725C02F2101/38C02F2101/40C02F2305/02
Inventor 张良波刘永德万东锦张宝忠祝慧娜李莹刘彬
Owner HENAN UNIVERSITY OF TECHNOLOGY
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