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Outline
Through quantitative analysis of major multi-class dominant coexisting components in municipal tailwater, this study conducted comparative experiments to examine the differences in the rejection selectivity behavior of a self-made heterogeneous polyamide nanofiltration (NF) membrane towards three typical trace-level pharmaceutical active compounds (PhACs), under conditions with and without the influence of solute-solute affinity interactions. Building on this foundation, the existence forms and partitioning characteristics of target PhACs in the presence of the complex environmental matrix of municipal tailwater were further explored, revealing the size and hydrophilic/hydrophobic effects of bounded PhACs. The results demonstrated that the co-existing components enhanced the water/diclofenac selectivity of the piperidine-doped NF membrane by 1.15 orders of magnitude. Characterizations based on apparent hydrodynamic diameter, absorbance ratio and fluorescence spectroscopy collectively provided robust evidences for the occurrence of solute-solute micro-interfacial affinity interactions between target PhACs and the dominant co-existing components. The percentage of bounded PhACs ranged from 71.2% to 96.3%. Furthermore, the study observed a positive correlation between the molecular weights of bounded-PhACs and their hydrophobicity. Besides, the expression of dominant hydrophobic fractions was found to be closely associated with the dissociation tendency and strength of PhACs in environmental water bodies.
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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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