[Occurrence Characteristics and Ecological Risk Assessment of Antibiotics in Reclaimed Water-receiving Rivers in
Ya-Lin Wu1, Jing-Xu Xu1, Gui-Zhong Liu1
1National Engineering Research Center of Urban Environmental Pollution Control, Beijing Municipal Research Institute of Eco-Environmental Protection, Beijing 100037, China.
Huan Jing Ke Xue= Huanjing Kexue
|September 26, 2024
Summary
Antibiotics, including ofloxacin and clarithromycin, were detected in Beijing's Liangshui River water and sediment. Concentrations were higher in tributaries and during the dry season, posing a low ecological risk overall.
Area of Science:
- Environmental Chemistry
- Ecotoxicology
- Water Quality Analysis
Context:
- Liangshui River, a reclaimed water-receiving river in Beijing, faces potential contamination from various sources.
- Antibiotic pollution is a growing global concern, impacting aquatic ecosystems.
Purpose:
- To analyze the types, frequencies, and concentrations of 16 antibiotics in the water and sediment of Liangshui River.
- To investigate the spatial-temporal variations and occurrence characteristics of these antibiotics.
- To assess the ecological risk posed by detected antibiotics.
Summary:
- Nine and 13 antibiotics were detected in water and sediment, respectively, with ofloxacin and clarithromycin being predominant.
- Antibiotic concentrations decreased downstream in the mainstream but were higher in tributaries and during the dry season.
- Ecological risk assessment indicated low to no risk, though some sites approached medium risk during the dry season.
Impact:
- Provides crucial data on antibiotic contamination in a major urban river system.
- Informs environmental management strategies for mitigating antibiotic pollution in reclaimed water bodies.
- Highlights the need for continued monitoring, especially during dry seasons, to ensure ecosystem health.
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