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Preparation method of soluble black carbon-iron oxide coprecipitation Fenton-like catalyst, and application of catalyst in catalytic degradation of norfloxacin

A technology of iron oxide and norfloxacin, which is applied in the field of preparation of soluble black carbon-iron oxide co-precipitated Fenton-like catalysts, and achieves high ability to generate and accumulate OH, mild reaction conditions and fast reaction rate. Effect

Active Publication Date: 2020-01-24
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the treatment of norfloxacin in wastewater is mainly based on adsorption, and some progress has been made in photooxidation, microbial degradation and advanced oxidation treatment, but more efficient treatment methods still need to be developed

Method used

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  • Preparation method of soluble black carbon-iron oxide coprecipitation Fenton-like catalyst, and application of catalyst in catalytic degradation of norfloxacin
  • Preparation method of soluble black carbon-iron oxide coprecipitation Fenton-like catalyst, and application of catalyst in catalytic degradation of norfloxacin
  • Preparation method of soluble black carbon-iron oxide coprecipitation Fenton-like catalyst, and application of catalyst in catalytic degradation of norfloxacin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Preparation of soluble black carbon-iron oxide co-precipitation material.

[0025] (1) Preparation of 50mM 2-(N-morpholine)ethanesulfonic acid (MES) solution: Weigh 10.66g of 2-(N-morpholine)ethanesulfonic acid into a beaker, add ultrapure water to dissolve, Transfer to a 1L volumetric flask and add water to the mark. Transfer 50 mL of MES solution to a conical flask as a buffer system for preparing co-precipitation.

[0026] (2) Weigh 0.392g ferrous ammonium sulfate and add it to the buffer system, causing Fe in the system 2+ The final concentration was 20mM, and then 0.069g, 0.548g and 1.035g of soluble black carbon were added to the system according to the carbon-iron molar ratio C / Fe=0.2, C / Fe=1.6 and C / Fe=3.

[0027] (3) The pH of the system was adjusted to 6 with NaOH solution, and the Erlenmeyer flask was placed in a shaker for shaking (30°C, 150rpm). Regular detection of Fe in the system by phenanthrozine method 2+ Concentration, when there is no ...

Embodiment 2

[0028] Example 2: The soluble black carbon-iron oxide co-precipitation material catalyzes the generation and accumulation of OH in the Fenton-like reaction process.

[0029] (1) Weigh the soluble black carbon-iron oxide co-precipitation material of C / Fe=0.2, C / Fe=1.6 and C / Fe=3 respectively of 5mg, transfer in the Erlenmeyer flask, and transfer to the Erlenmeyer flask Add 19.5mL of ultrapure water to the solution, weigh 0.0244g of benzoic acid and add it to the system. After dissolution, the concentration of benzoic acid in the system is 10mM. Using benzoic acid as a probe, the concentration of OH in the solution is quantified by high performance liquid chromatography.

[0030] (2) with a concentration of 2M H 2 SO 4 The pH of the solution was adjusted to 3, and 0.5mL of 80mM H was added to the system. 2 o 2 (final concentration 2mM), the Erlenmeyer flask was placed on a magnetic stirrer, and the rotation speed was set at 600rpm.

[0031] (3) The Fenton-like reaction catal...

Embodiment 3

[0033] Example 3: The soluble black carbon-iron oxide co-precipitation material is applied to degrade norfloxacin pollutants.

[0034] (1) Weigh 2 mg of soluble black carbon-iron oxide co-precipitation materials (C / Fe=0.2, C / Fe=1.6 and C / Fe=3) with different carbon-iron ratios and place them in conical flasks, Add the ultrapure water of 19.35ml in the bottle, then add 0.4mL concentration in the system and be the norfloxacin mother liquor of 1g / L, make the final concentration of norfloxacin in the system be 20mg / L.

[0035] (2) Add 0.25mL of 80mM H to the system 2 o 2 solution (final concentration 1mM), with a concentration of 2M H 2 SO 4 The solution adjusts the pH of the system to 3, places it on a magnetic stirrer, and sets the rotating speed to 600rpm for reaction; samples are taken regularly, the samples pass through a 0.22 μm water film, and the concentration of remaining norfloxacin in the system is determined by high performance liquid chromatography.

[0036] The r...

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Abstract

The invention provides a preparation method of a soluble black carbon-iron oxide coprecipitation Fenton-like catalyst, and an application of the catalyst in catalytic degradation of norfloxacin. The synthesis method comprises the following steps: 1, preparing black carbon; 2, extracting soluble black carbon; 3, carrying out coprecipitation preparation of the soluble black carbon-iron oxide: taking2-(N-morpholine)ethanesulfonic acid as a buffer solution, adding the soluble black carbon according to a final carbon-iron molar ratio of 0.2-3, adjusting the pH value to 6, putting the obtained system into a shaking table until Fe<2+> in the system is completely oxidized into Fe<3+>, centrifugally collecting the obtained solid-phase product, and washing and freeze-drying the solid-phase productto obtain the soluble black carbon-iron oxide coprecipitation material with different carbon-iron ratios. The prepared soluble black carbon-iron oxide coprecipitation Fenton-like catalyst is applied to treatment of norfloxacin-containing wastewater, and has the advantages of high reaction rate, high degradation efficiency and high reusability. The preparation method has the advantages of wide material sources, simple material preparation process, and facilitation of promotion and application in the actual wastewater treatment process.

Description

technical field [0001] The invention relates to a preparation method and application of a soluble black carbon-iron oxide co-precipitation Fenton-like catalyst. Background technique [0002] In recent years, the rapid development of my country's industry and agriculture has led to more and more persistent and refractory organic compounds entering the environment due to the discharge of industrial wastewater. With the promulgation and improvement of my country's environmental protection laws and regulations and the continuous improvement of people's environmental quality requirements, there is an urgent need for new methods for more efficient treatment of toxic and harmful refractory organic pollutants. Fenton oxidation, as one of the advanced oxidation techniques, utilizes Fe 2+ and H 2 o 2 The reaction produces hydroxyl radicals (·OH) to degrade organic pollutants, which has the advantages of low cost, low energy consumption, green and pollution-free. However, the tradi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/72C02F101/38C02F103/34
CPCB01J23/745C02F1/722C02F1/725C02F2101/38C02F2103/343C02F2305/026
Inventor 柳广飞沈玲羽周集体金若菲
Owner DALIAN UNIV OF TECH
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