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
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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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