Technology for preparing Fe3O4/mesoporous carbon composite material by one-step synthesis process, and method for catalytic oxidation degradation of sulfamethazine by using composite material

A sulfamethazine, composite material technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as easy agglomeration, and achieve unique The effect of secondary pollution, simple process flow and strong operability

Active Publication Date: 2019-02-01
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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  • Technology for preparing Fe3O4/mesoporous carbon composite material by one-step synthesis process, and method for catalytic oxidation degradation of sulfamethazine by using composite material
  • Technology for preparing Fe3O4/mesoporous carbon composite material by one-step synthesis process, and method for catalytic oxidation degradation of sulfamethazine by using composite material
  • Technology for preparing Fe3O4/mesoporous carbon composite material by one-step synthesis process, and method for catalytic oxidation degradation of sulfamethazine by using composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This example examines Fe 3 O 4 / Mesoporous carbon composite material in different dosage of sulfamethazine adsorption efficiency.

[0032] (1) The FeCl with a molar ratio of 2:1 3 ·6H 2 O and FeCl 2 ·4H 2 O (of which FeCl 3 ·6H 2 O take 21.64g, FeCl 2 ·4H 2 O take 7.96g) Dissolve a constant volume 100mL volumetric flask with oxygen-free water. 0.9mol·L at room temperature -1 Add the ammonia droplets to the above-mentioned iron salt mixture, stir vigorously while adding, and pass nitrogen protection. Add ammonia water dropwise to around pH 9.0, the amount of ammonia water is about 700mL, keep nitrogen gas and stir for 30min, then settle for 30min, pour off the supernatant, wash with oxygen-free water three times to make the pH nearly neutral, and then use a centrifuge (3000rpm ) Centrifuge for 10 min, pour out the supernatant, put the product in a constant temperature drying oven and dry at 95℃ to obtain Fe 3 O 4 .

[0033] (2) Combine PVA and Fe prepared in step (1) 3 O 4 A...

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 material.

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

[0042] Utilize 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 denoted as systems 1, 2, 3, 4 and 5 respectively; sulfamethazine is the target pollutant. The initial concentration of the aqueous solution is 50mg / L and 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 them in a constant temperature oscillator and oscillate for a certain period of time, take samples at 15, 30, 45, 60, 75, and 90 minutes, and measure the concent...

Embodiment 3

[0048] This example compares the effects of different qualities of the oxidant sodium persulfate on the degradation rate of sulfamethazine.

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

[0050] Utilize prepared Fe 3 O 4 / Mesoporous carbon composite material is the catalyst, its dosage is 0.1392g, sulfamethazine is the target pollutant, the initial concentration of its aqueous solution is 50mg / L, the volume is 100mL; the mass of sodium persulfate is 0, 0.0119, 0.0238, 0.0476, 0.0714, 0.1190g, respectively denoted 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 them in a constant temperature oscillator and oscillate for a certain period of time, take samples at 15, 30, 45, 60, 75, and 90 minutes, and measure the concentration of the supernatant after the reaction.

[0051] Table 3 shows the effic...

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Abstract

The invention discloses a technology for preparing a Fe3O4 / mesoporous carbon composite material by a one-step synthesis process, and a method for the degradation of sulfamethazine by activating persulfate with the composite material to generate sulfate radicals. The Fe3O4 / mesoporous carbon composite material is prepared through the one-step synthesis process, and Fe3O4 is efficiently and uniformlyloaded by using the large specific surface area and the porous structure of mesoporous carbon. The method uses the adsorption and catalysis synergistic effects of the prepared composite material to efficiently and continuously activate the persulfate to generate the sulfate radicals in order to degrade the sulfamethazine, so the degradation effect of the sulfamethazine is enhanced. The compositematerial has a strong stability, and still keeps a high activity after repeatedly recycled. The method has the advantages of improved biodegradability, simple and feasible operating steps, environmental protection, high catalysis activity and good recyclability when used to treat non-biodegradable sulfanilamide antibiotic wastewater, especially sulfamethazine-containing antibiotic wastewater, so the method has a broad application prospect.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(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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