We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
典型抗生素在城市污水处理厂各单元出水中的分布及 受纳水体生态风险.
- Authors
牟霄; 张崇淼; 李永强; 刘瑶
- Abstract
In order to explore the ecological risks caused by antibiotic discharge from urban wastewater, two wastewater treatment plants (WWTPs) in Xi'an were selected as the research objects. Nine antibiotics including three sulfonamides, three tetracyclines and three quinolones were quantitatively determined by solid phase extraction- ultra-high performance liquid chromatography-tandem mass spectrometry (SPE-UPLC-MS/MS). The contribution rate of different treatment stages to the removal of antibiotics and the relationship between water quality indicators and antibiotics concentration were studied. The risk quotient method was used to evaluate the ecological risk of antibiotics in receiving water. The results showed that five antibiotics (norfloxacin, ciprofloxacin, enrofloxacin, sulfamethoxazole and sulfadiazine) were detected in two WWTPs, with the concentration range of 25.0 ~349.7 ng ·L-1, of which norfloxacin, ciprofloxacin and sulfamethoxazole were the main antibiotics in effluent water, with concentrations all above 100 ng·L-1. The second biological treatment unit had a good removal effect on norfloxacin and ciprofloxacin, and the removal rate of norfloxacin and ciprofloxacin by the AAO process is better than the oxidation ditch process, while chlorine disinfection had a high removal rate on sulfamethoxazole, and anaerobic treatment could increase the concentration of sulfonamides in water. The correlation analysis showed that both ammonia nitrogen and COD have significant correlations with the antibiotic concentration. The ecological risks caused by norfloxacin, enrofloxacin and sulfamethoxazole in the receiving water were of medium risk level (0.1≤RQ<1), and ciprofloxacin showed a high risk (RQ =3.10>1).
- Subjects
XI'AN Shi (China); LIQUID chromatography-mass spectrometry; OXIDATION ditches; ANTIBIOTIC residues; SEWAGE disposal plants; TANDEM mass spectrometry; NORFLOXACIN; TETRACYCLINES
- Publication
Asian Journals of Ecotoxicology, 2023, Vol 18, Issue 3, p465
- ISSN
1673-5897
- Publication type
Article
- DOI
10.7524/AJE.1673-5897.20230117002