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Outline
The fugacity model is a widely used multimedia environmental fate model for organic pollutants. Multimedia environmental fate of typical antibiotics including ofloxacin and roxithromycin in Liangshui River using reclaimed water was simulated and researched based on level IV fugacity model, and the reliability of model was verified in this study. For another, transfer flux and the main transport process were analysed and identified. Meanwhile, the model key parameters were conducted by sensitivity analysis and uncertainty analysis. The results showed that the simulated concentrations were in good agreement with the measured concentrations, which indicated the simulation effectiveness of the model in the study area. When the environmental system reached equilibrium in the study area, the water advection outflow was identified as the primary export process for target antibiotics in water, while the interfacial exchange process with water phase was the major process for sediment. Sediment was the main reservoir of two antibiotics in the study area because of the mass fraction of ofloxacin and roxithromycin in water and sediment, respectively, were 8.73% and 91.27%, 27.46% and 72.54% at equilibrium. Henry's Law constant (H) significantly influenced the two-phase migration behavior. This study provides theoretical basis and decision-making support for environmental prediction and pollution control of antibiotics in rivers using reclaimed water.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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