SBA-15 supported cobalt oxide catalyst as well as preparation method and application thereof in wastewater treatment

A technology for cobalt oxide and wastewater treatment, which can be used in oxidation water/sewage treatment, textile industry wastewater treatment, electrochemical water/sewage treatment, etc. The method is simple, inexpensive and stable

Inactive Publication Date: 2013-09-18
WUHAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Since the photocatalytic oxidation method mostly uses semiconductor material catalysts, its catalytic activity in the visible light and the development of high-efficiency photoreactors need to be further improved, while the catalytic wet oxidation method is relatively harsh due to the reaction conditions (high temperature and high pressure). Its application is limited due to the high price

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  • SBA-15 supported cobalt oxide catalyst as well as preparation method and application thereof in wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Preparation of SBA-15 supported cobalt oxide catalyst

[0026] SBA-15 mesoporous material is synthesized by the method in the literature: take a certain amount of triblock copolymer P123 and dissolve it in a certain volume of 1.9M hydrochloric acid, and control the temperature of the solution between 35~38℃. After P123 is stirred and dissolved, add 15.5mL TEOS dropwise, stir for 24 hours at a solution temperature of 38°C, then place the resulting sample in an autoclave, and put the autoclave into an oven at a temperature of 100°C for 24 hours After the autoclave is cooled, the solid sample obtained by suction filtration is dried at 80°C for 12 hours, and the obtained solid is calcined at 550°C for 4 hours (temperature rise program is 1°C / min).

[0027] Add aminoacetic acid to the cobalt nitrate solution, the mass ratio of aminoacetic acid to nitrate ion is 1:1, stir for 2 hours; add SBA-15, the mass ratio of cobalt to SBA-15 is 3.6%; stir at room temperature 24 H...

Embodiment 2

[0028] Example 2: Heterogeneous activated peroxymonosulfate wastewater treatment system

[0029] In this embodiment, Orange II is selected as the target refractory organic pollutant to simulate refractory organic wastewater. The content of Orange II is 100mg / L. 1.0g / L of SBA-15 supported cobalt oxide catalyst and peroxymonosulfate were added to the wastewater. After 120 minutes of treatment at room temperature, a decolorization rate of 13.6% was achieved. The detailed operating conditions and processing results are as follows:

[0030] Operating conditions: Orange Ⅱ solution concentration: 100mg / L

[0031] Orange Ⅱ wastewater volume: 100mL

[0032] pH value: 6.0

[0033] Persulfate concentration: 2.0g / L

[0034] SBA-15 supported cobalt oxide catalyst dosage: 1.0g / L, react at room temperature.

[0035] Time (minutes)

Embodiment 3

[0036] Example 3: Ultrasound and Heterogeneous Activation of Persulfate Wastewater Treatment System

[0037] In this embodiment, Orange II is selected as the target refractory organic pollutant to simulate refractory organic wastewater. The content of Orange II is 100mg / L. 1.0g / L SBA-15 supported cobalt oxide catalyst and peroxymonosulfate were added to the wastewater, and after 120 minutes of ultrasonic treatment at room temperature, a decolorization rate of 89.6% was achieved. Compared with Example 2, it can be seen that the decolorization rate of the heterogeneously activated persulfate system under the same conditions is 13.6%, while the decolorization rate of pure ultrasonic radiation is almost 0, indicating that ultrasound and heterogeneous activated persulfate technology The combination has a synergistic effect and can strengthen the decolorization effect of peroxymonosulfate on Orange II. The detailed operating conditions and processing results are as follows:

[0038] O...

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Abstract

The invention relates to a SBA-15 supported cobalt oxide catalyst as well as a preparation method and an application thereof in wastewater treatment. Cobalt oxide is loaded on an SBA-15 mesoporous material, the cobalt oxide is one or more of cobaltous oxide, cobalt sesquioxide and cobaltosic oxide. The SBA-15 supported cobalt oxide catalyst is used for activating peroxymonosulfate, and in combination with ultrasonic and electrochemical technologies, the SBA-15 supported cobalt oxide catalyst has a better degradation effect on organic pollutants in wastewater, the technical process is simple, and the implementation cost is low, so that the SBA-15 supported cobalt oxide catalyst has better generalization foreground.

Description

Technical field [0001] The invention belongs to the field of mesoporous catalyst synthesis, and specifically relates to an SBA-15 supported cobalt oxide catalyst, a preparation method and its application in wastewater treatment. Background technique [0002] Organic wastewater is a type of wastewater that is difficult to degrade. Taking printing and dyeing wastewater as an example, its discharge volume is large, the content of organic pollutants is high, and the types are complex. Due to the stability of the chemical structure of organic pollutants, the high toxicity, and the high difficulty of treatment, traditional treatment techniques have been severely challenged. It is difficult to achieve satisfactory treatment results by applying conventional treatment techniques, such as physical and chemical methods, chemical methods, biological methods and their combination methods. [0003] The traditional advanced oxidation technology is to produce · OH is an oxidizing agent to degrad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/035C02F1/72C02F1/36C02F1/46C02F103/30
Inventor 张晖蔡纯钟欣
Owner WUHAN UNIV
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