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In the present study, Manganese oxide octahedral molecular sieve (OMS-2PS) was synthesized using K2S2O8 and(CH3COO)2Mn·4H2O via a solid-phase method. The physicochemical properties of OMS-2PS were analyzed via X-ray diffraction(XRD), Fourier-transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). The performance of persulfate activation by OMS-2PS for degrading organic contaminants was examined. This study also investigated the effect of various parameters, including dosage of OMS-2PS, PS concentration, and initial pH, on AO7 removal efficiency. Moreover, the mechanism of PS activation by OMS-2PS was explored. The results showed OMS-2PS was successfully synthesized via a solid-phase method, which exhibits a nanorod structure. OMS-2PS could activate PS to degrade organic contaminants. The use of 50mg/L AO7,1.0g/L OMS-2PS, and 2.0mmol/L PS led to the AO7 removal and mineralization rates of 97.4% and 50.1%, respectively. Ion coexistence experiments demonstrated that AO7 removal was considerably inhibited by Cl−, NO3−, and CO32−, while HA had almost no effect on it. The free radical quenching experiments and electron paramagnetic resonance (EPR) analysis indicated ·OH and SO4•−were the primary active oxygen species in the OMS-2PS/PS system, and ·OH played the dominant role in the AO7 degradation. XPS analysis revealed Mn(IV) and lattice oxygen on the surface of OMS-2PS were the main active sites for PS activation. Based on experiment results, a potential activation mechanism of PS by OMS-2PS was proposed that PS combined with OMS-2PS through the hydroxyl groups on the surface of OMS-2PS, and then PS reacted with the active sites on the surface of OMS-2PS to produce active oxygen species. In addition, The OMS-2PS/PS system effectively removed AO7 from different water bodies, and also degraded efficiently other pollutants including bisphenol A, naphthalene, and tetracycline, indicating that the OMS-2PS/PS system have a bright application prospect in environmental pollution control.
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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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