UV photolysis as an efficient pretreatment method for antibiotics decomposition and their antibacterial activity elimination
| Autor: | Shuang-Jiang Liu, Yang-Cheng Ding, Bin Liang, Wenzong Liu, Wen-Li Jiang, Hong-Cheng Wang, Hao-Yi Cheng, Aijie Wang, Muhammad Rizwan Haider, Jing-Long Han |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Staphylococcus aureus
Environmental Engineering medicine.drug_class Ultraviolet Rays Health Toxicology and Mutagenesis Antibiotics 0211 other engineering and technologies 02 engineering and technology 010501 environmental sciences Wastewater 01 natural sciences Water Purification Antibiotic resistance Cefalexin Ampicillin medicine Environmental Chemistry Waste Management and Disposal 0105 earth and related environmental sciences 021110 strategic defence & security studies Photolysis Chemistry Biological activity Pollution Combinatorial chemistry Anti-Bacterial Agents Ofloxacin Antibacterial activity Water Pollutants Chemical medicine.drug |
| Zdroj: | Journal of Hazardous Materials |
| ISSN: | 1873-3336 |
| Popis: | The biological treatment of antibiotic-containing wastewater is a mainstream process, but the antibacterial activity from the persistence of antibiotics would inhibit the biological activity and function of wastewater treatment plants and lead to the risk of transmission of antibiotic resistant bacteria and genes. In this study, UV photolysis was selected as an appropriate pretreatment technology for antibiotic-containing wastewater. It could decompose many kinds of antibiotics and was not inhibited by the coexisting organics in wastewater. The antibacterial activities of five kinds of antibiotics, which were eliminated with UV irradiation, exhibited a significantly positive correlation with their parent compound concentrations. The photodecomposition of the main functional groups in antibiotics contributed to the elimination of antibacterial activity. Defluorination was the main pathway to eliminate the antibacterial activity of antibiotics containing a fluorine substituent (e.g., florfenicol and ofloxacin), while the photoinduced opening of the β-lactam ring was the most efficient route to eliminate the antibacterial activity of β-lactam antibiotics (e.g. cefalexin, amoxicillin and ampicillin). These results demonstrated that UV photolysis could be adopted as an efficient and promising pretreatment strategy for the source control of antibiotic antibacterial activity by the decomposition of antibiotic functional groups before the biological treatment unit. |
| Databáze: | OpenAIRE |
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