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Method for degrading sulfonamide antibiotics in water through intensifying singlet oxygen with cationic sufactant

A surfactant and cationic technology, applied in the field of water pollution treatment, can solve the problems that cannot meet the requirements of removing residual antibiotics, achieve good potential and application prospects, fast and efficient removal, and good oxidation ability

Inactive Publication Date: 2015-01-28
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the traditional sewage biological treatment technology cannot meet the requirements of removing residual antibiotics, the application of various advanced oxidation technologies has emerged
However, there have been no reports on methods and systems for the oxidative degradation of antibiotics using singlet oxygen.

Method used

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  • Method for degrading sulfonamide antibiotics in water through intensifying singlet oxygen with cationic sufactant
  • Method for degrading sulfonamide antibiotics in water through intensifying singlet oxygen with cationic sufactant
  • Method for degrading sulfonamide antibiotics in water through intensifying singlet oxygen with cationic sufactant

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Oxidative degradation and concentration effect of five-membered ring-sulfathiazole (STZ):

[0022] (1) Oxidative degradation of sulfathiazole:

[0023] The four solutions containing STZ were placed under natural light, and the results were shown in Table 1 by HPLC detection and analysis. The half-life of STZ direct photolysis is 2.36h. After adding RB, that is, the half-life of STZ after photo-oxidative degradation was 0.16h, which was accelerated by 14.93 times. After the addition of CTAB, the photosensitive oxidation was enhanced by 26 times, and at the same time, it was promoted by 388.65 times compared with STZ's own photolysis, and the half-life was only 36s.

[0024] (2) Investigation of concentration effect

[0025]Three groups of the above-mentioned four solutions containing STZ were prepared, in which [CTAB]=1CMC, [STZ]:[RB] were 1:1, 10:1, 40:1 respectively in the three groups of solutions, and adjusted to pH=7 , place it in a photolysis tube, and place th...

Embodiment 2

[0029] Oxidative degradation of six-membered ring-sulfadiazine (SD): The four solutions containing SD were placed under sunlight, and the results were shown in Table 1 by HPLC detection and analysis. Under sunlight, the half-life of SD direct photolysis was 9.63h. After adding RB, the half-life of SD after photosensitive oxidative degradation was 2.4 min, which was promoted by 234.41 times. After the addition of CTAB, the photosensitive oxidation was enhanced by 2.45 times, and at the same time, it was promoted by 574.68 times compared with the direct photolysis of SD self-photolysis, and the half-life period was only 72s.

Embodiment 3

[0031] Oxidative degradation of six-membered ring-sulfadoxine (SDX): The four solutions containing SDX were placed in sunlight, and the results were shown in Table 1 by HPLC detection and analysis. Under sunlight, the half-life of SDX direct photolysis is 11.55h. After adding RB, that is, the half-life of SDX after photosensitive oxidative degradation was 36.6 min, a 19-fold improvement. After the addition of CTAB, the photosensitive oxidation was enhanced by 4.7 times, and at the same time, it was accelerated by 89.38 times compared with SDX self-photolysis, and the half-life was shortened to 7.8min.

[0032] Table 2 Photooxidation of sulfathiazole at different concentrations under simulated sunlight

[0033]

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Abstract

The invention discloses a method for degrading sulfonamide antibiotics through photosensitized oxidation, and relates to a new method for rapidly efficiently degrading sulfonamide antibiotics through intensifying photosensitized oxidation efficiency with a cationic surfactant, belonging to the field of water pollution treatment methods. According to the method, dye rose bengal and oxygen generate strong oxydic singlet oxygen in sunlight so as to oxidize and degrade sulfonamide antibiotics; due to the introduction of the cationic surfactant, the oxidation effect is further intensified, so that the sulfonamide antibiotics are rapidly and efficiently degraded, and the potential risk of the sulfonamide antibiotics to the environment and human is lowered. The method also can inspect the concentration of the sulfonamide antibiotics. In the inspected concentration range, the cationic surfactant can intensify the oxidation effect of the singlet oxygen, so that the method has good feasibility and application prospect.

Description

technical field [0001] The invention relates to a method for strengthening singlet oxygen to degrade antibiotics in water by a cationic surfactant, and belongs to the field of water pollution treatment methods. Background technique [0002] In recent years, antibiotics have been widely used in the treatment of human and animal diseases, and have also been added to animal feeds for a long time at sub-therapeutic doses to prevent diseases and promote growth. Emissions to the environment are widely detected in environmental media (especially in water bodies), such as the literature "Environ. .", "J.Chromatogr.A, 2001, 938, 199-210." reported that antibiotics were detected in sewage, hospital wastewater and drinking water, respectively. Antibiotics can induce the emergence of drug-resistant bacteria in the environment, such as the literature "Environ. highly anticipated. In the environmental discharge of antibiotics, sewage treatment plants play an important role as a source ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F101/38
CPCY02W10/37C02F1/30C02F2101/38
Inventor 乔显亮周菲陈景文
Owner DALIAN UNIV OF TECH
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