期刊
BIORESOURCE TECHNOLOGY
卷 323, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.124574
关键词
Antibiotic resistance genes; Bacteria; Biodegradation; Eukaryotes; Wetlands
资金
- Major Science and Technology Program for Water Pollution Control and Treatment of China [2018ZX07208-4]
- National Natural Science Foundation of China [E51579075, E51879084]
- Excellent Scientific and Technological Innovation Team in Jiangsu Province
The study showed that Vallisneria spiralis has a strong adsorption capacity for CIP, and that CIP can have a prolonged impact on epiphytic biofilm microbial communities.
This study investigated the fate of ciprofloxacin (CIP) in wetlands dominated by Vallisneria spiralis. About 99% of CIP was degraded from overlaying water within 4 days of treatment but significantly inhibited the nutrient removal capacity (TN, TP, and COD) by causing a drastic reduction in microbial aggregation in epiphytic biofilm and bacterial biodiversity. CIP triggered resistance mechanisms among dominant bacteria phyla such as Proteobacteria, Actinobacteria, and Planctomycetes causing their increased relative abundance. Additionally, the relative abundances of eukaryotic microorganisms (including; Chloroplastida, Metazoa, and Rhizaria) and 13 ARGs subtypes (including; Efflux pump, Tetracycline, Multi-drug, Rifampin, Beta-lactam, Peptide, Trimethoprim) were significantly increased. While dominant metabolic pathways such as Carbohydrate, amino acid, energy and nucleotide metabolism were inhibited. This study revealed that V. spiralis has great sorption capacity for CIP than sediment and though CIP was effectively removed from the overlying water, it caused a prolonged effect on the epiphytic biofilm microbial communities.
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