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Method of using lanthanum ruthenate-bearing perovskite to activate peracetic acid to degrade fluoroquinolone antibiotics

A technology of peracetic acid and fluoroquinolones, which is applied in chemical instruments and methods, chemical/physical processes, catalyst activation/preparation, etc., can solve problems such as secondary pollution and low activation efficiency of peracetic acid, and achieve economic cost reduction, Promote the promotion and application, improve the effect of activation efficiency

Active Publication Date: 2019-04-05
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem to be solved by the present invention is: the activation efficiency of peracetic acid is low, and the water-soluble metal ion is easy to cause secondary pollution as a catalyst

Method used

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  • Method of using lanthanum ruthenate-bearing perovskite to activate peracetic acid to degrade fluoroquinolone antibiotics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) According to the molar ratio La:Ru:CA=1:1:2, weigh La(NO 3 ) 3 ·6H 2 O, RuCl 3 and C 6 h 8 o 7 ·H 2 O After mixing, add water to dissolve it, stir the solution vigorously, while raising the temperature to 65°C, continue to add ethylene glycol and keep it at this temperature until it becomes a viscous gel-like substance due to the slow evaporation of water;

[0031] (2) Transfer the beaker to a heating mantle to provide uniform heating, and the temperature rises to 120° C. for 1 hour, at which time a 3D polymer structure is formed through the reaction of citric acid and ethylene glycol;

[0032] (3) Place the beaker containing the remaining product in an oven (>100°C) to dry thoroughly;

[0033] (4) After drying, the polymer was pulverized and calcined at 800° C. for 8 hours to decompose the polymer and obtain the desired oxide phase.

Embodiment 2

[0035] (1) According to the molar ratio La:Ru:CA=1:5:6, weigh La(NO 3 ) 3 ·6H 2 O, RuCl 3 and C 6 h 8 o 7 ·H 2 O After mixing, add water to dissolve it, stir the solution vigorously, while raising the temperature to 65°C, continue to add ethylene glycol and keep it at this temperature until it becomes a viscous gel-like substance due to the slow evaporation of water;

[0036] (2) Transfer the beaker to a heating mantle to provide uniform heating, and the temperature rises to 120° C. for 1 hour, at which time a 3D polymer structure is formed through the reaction of citric acid and ethylene glycol;

[0037] (3) Place the beaker containing the remaining product in an oven (>100°C) to dry thoroughly;

[0038] (4) After drying, the polymer was pulverized and calcined at 900° C. for 7 hours to decompose the polymer and obtain the desired oxide phase.

Embodiment 3

[0040] (1) According to the molar ratio La:Ru:CA=1:2:3, weigh La(NO 3 ) 3 ·6H 2 O, RuCl 3 and C6 h 8 o 7 ·H 2 O After mixing, add water to dissolve it, stir the solution vigorously, while raising the temperature to 65°C, continue to add ethylene glycol and keep it at this temperature until it becomes a viscous gel-like substance due to the slow evaporation of water;

[0041] (2) Transfer the beaker to a heating mantle to provide uniform heating, and the temperature rises to 120° C. for 4 hours, at which time a 3D polymer structure is formed through the reaction of citric acid and ethylene glycol;

[0042] (3) Place the beaker containing the remaining product in an oven (>100°C) to dry thoroughly;

[0043] (4) After drying, the polymer is pulverized and calcined at 1000° C. for 6 hours to decompose the polymer and obtain the desired oxide phase.

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Abstract

The invention discloses a method of using a lanthanum ruthenate-bearing perovskite (LaRuO3) catalyst to heterogeneously activate peracetic acid to treat fluoroquinolone antibiotics wastewater, and relates to the field of water treatment. The invention is intended to solve the problem that existing peracetic acid catalytic activation techniques have low efficiency and may cause secondary pollution,and develops a more efficient, economical and environment-friendly method. In the method, lanthanum ruthenate-bearing perovskite is used for the first time to activate peracetic acid to generate hydroxy free radicals via activation, thereby further oxidizing fluoroquinolone antibiotics in wastewater. The method has evident effect in removing the typical fluoroquinolone antibiotic ciprofloxacin, with removal rate reaching about 92% in 30 min. The method has the advantages of high activation efficiency, high efficiency and speed of pollutant removal, wide pH applicable range, lower cost owing to LaRuO3 reusability, good operational convenience and the like.

Description

technical field [0001] The invention relates to the technical field of water pollution control, in particular to a method for heterogeneously activating peroxysulfate as a ruthenate lanthanum perovskite catalyst to degrade fluoroquinolone antibiotics in water. Background technique [0002] Pharmaceuticals and personal care products (PPCPs) are a new class of pollutants with characteristics of low concentration, diversity, low volatility and slow biodegradation, including various antibiotics, prescription and non-prescription drugs, skin care products, fragrances and musk, etc. Has been widely detected in the environment. As an important PPCPs, fluoroquinolone antibiotics (FQs) are a class of synthetic broad-spectrum antibacterial drugs, which are widely used clinically in the treatment of various infectious diseases in animals and humans, among which ciprofloxacin (CIP ) are widely used around the world. FQs have high biological toxicity and are difficult to biodegrade. Di...

Claims

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Application Information

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IPC IPC(8): C02F9/04C01G55/00B01J23/63C02F101/36C02F103/02
CPCC01G55/002C02F9/00B01J23/002B01J23/63C02F1/66C02F1/58C02F1/722C02F2103/026C02F2101/363B01J37/082C02F1/725C02F2101/34C02F2101/36C02F2101/38
Inventor 周雪飞张亚雷陈家斌张龙龙褚华强郭慧超
Owner TONGJI UNIV
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