Sodium persulfate sustained-release agent suitable for catalytic oxidation degradation of antibiotics and its preparation and application

A technology of sodium persulfate and catalytic oxidation, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of manganese dioxide research, etc., and achieve good coating effect and oxidative degradation performance The effect of lifting and releasing for a long period

Active Publication Date: 2022-05-03
ZHEJIANG GONGSHANG UNIVERSITY
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  • Description
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  • Application Information

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Problems solved by technology

[0006] Zhang Lina's master's thesis "Research on the Degradation of Organic Pollutants in Groundwater by Activation of Sodium Persulfate by Iron Tetroxide" reported the effect of manganese dioxide and other transition metal oxides as activators to activate sodium persulfate to degrade 1,2-dichloropropane. However, manganese dioxide has not been studied in depth

Method used

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  • Sodium persulfate sustained-release agent suitable for catalytic oxidation degradation of antibiotics and its preparation and application
  • Sodium persulfate sustained-release agent suitable for catalytic oxidation degradation of antibiotics and its preparation and application
  • Sodium persulfate sustained-release agent suitable for catalytic oxidation degradation of antibiotics and its preparation and application

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preparation example Construction

[0046] The preparation method of ordered mesoporous manganese oxide in the specific embodiment:

[0047] (1) Add 4mL of 50wt% manganese nitrate aqueous solution into 50mL of absolute ethanol suspension containing 3g of SBA-15, stir at 0°C for 4h and then add ammonia to adjust the pH of the reaction system to 11 after stirring for 4h, centrifuge after continuing to stir for 15min Separating, washing the solid product until neutral, drying at room temperature and calcining at 400°C for 4 hours to obtain the calcined product;

[0048] (II) replace SBA-15 with described calcined product, repeat step (I), obtain composite product;

[0049] (III) Disperse the composite product evenly in 200mL of 2mol / L sodium hydroxide solution, heat to boil, react to remove SBA-15 under reflux conditions, centrifuge after the reaction, wash the solid precipitate until neutral, vacuum at 60°C Dry for 24 hours to obtain the ordered mesoporous manganese oxide.

Embodiment 1

[0051] Use commercial manganese dioxide (Sinopharm Chemical Reagent Co., Ltd., analytically pure) to be a catalyzer, catalyze sodium persulfate to degrade tetracycline, control the initial concentration of tetracycline to be 20mg / L, catalyzer=0.1g / L, Na 2 S 2 o 8 = 2 mmol / L.

Embodiment 2

[0053] Use ordered mesoporous manganese oxide as a catalyst to catalyze sodium persulfate to degrade tetracycline, adopt the same test conditions as in Example 1, control the initial concentration of tetracycline to be 20mg / L, catalyst=0.1g / L, Na 2 S 2 o 8 = 2 mmol / L.

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Abstract

The invention discloses a sodium persulfate slow-release agent suitable for catalyzing oxidation and degrading antibiotics, its preparation and application in repairing soil and groundwater polluted by antibiotics. The sodium persulfate slow-release agent is based on the total mass of raw materials as 100%. The raw material composition includes: paraffin wax 30%-50%, quartz sand 30%-50%, ordered mesoporous manganese oxide 1%-4%, sodium persulfate 10% % to 20%; the ordered mesoporous manganese oxide is prepared by the hard template method, and the template agent is SBA-15. The preparation method comprises steps: (1) adding paraffin into absolute ethanol, heating to 60-80° C., after the paraffin is completely melted, adding surfactant, quartz sand, ordered mesoporous manganese oxide and Sodium persulfate; (2) cooling the molten state material that step (1) obtains promptly gets sodium persulfate sustained-release agent. The sodium persulfate slow-release agent has good coating effect, low release rate, good permeability and adsorption, and good oxidative degradation characteristics.

Description

technical field [0001] The invention relates to the technical field of soil and groundwater remediation, in particular to a sodium persulfate (Na persulfate) suitable for catalytic oxidation degradation of antibiotics 2 S 2 o 8 ) sustained-release agent and its preparation and application. Background technique [0002] With the continuous development of economy and society, my country's soil and groundwater environment have been seriously threatened by pollution in recent years. In particular, due to the complex geological characteristics of groundwater, the encapsulation of soil, the dynamics of groundwater and the synergy of microorganisms can hide pollutants here, which makes it extremely difficult to deal with pollutants in groundwater. If only relying on natural degradation, it will take hundreds to thousands of years for these organic pollutants to reach a harmless level. Therefore, it is necessary to develop a practical and effective treatment method to solve soil ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J35/10C02F101/30C02F103/06
CPCC02F1/725C02F1/722C02F1/281B09C1/08C02F2103/06C02F2101/30
Inventor 陈华丽严凯鑫徐坤苗王挺吴礼光杜春慧卢继强
Owner ZHEJIANG GONGSHANG UNIVERSITY
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