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Outline
In this study, the UV activated periodate (PI, IO4-) system (UV/PI) was investigated to degrade PhACs in urine (UV(10W low pressure, peak at 254nm), PI (5mmol/L)), the results demonstrated that the degradation rate of 12 selected Pharmaceutically active compounds (PhACs) exceeded 60% at 10min; based on this, the influence of urine matrix on PhACs degradation was further studied. In fresh urine matrices, urea and citrate reacted with the radicals, inhibiting the degradation of PhACs, with the rate constant ki decreasing by about 0.0083~0.0129s-1 compared to the UV/PI system. Meanwhile, Cl- reacted with the radicals to form lower reactive chlorine species (RCS), which negatively affected the degradation efficiency, with the ki decreasing by about 0.0015~0.0056s-1. In hydrolyzed urine matrices, urea and citrate were hydrolyzed into NH3 and HCO3-. Then, NH3 and HCO3- reacted with the radicals to produce reactive nitrogen species (RNS) and CO3·-, which further reacted with PhACs. UV/PI system exhibited significant structural selectivity for the degradation of PhACs.
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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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