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A spherical Co-based catalyst (Co-BC) was successfully synthesized via ion-exchange and molding (drying, binding, rolling, calcination) using ZSM-5 as support and Co(NO3)2 as active component, with ultralow Co content (0.94wt.%). Multiple characterizations (EDS/XRD/ICP/XPS) demonstrated Co-BC's efficient PMS activation for aqueous acetone (CVOC model) degradation. Under the conditions of 5×10-6acetone (initial pH=7), 7.5mmol/L PMS dosage, 10g/L Co-BC dosage, the removal efficiency of acetone can reach 100% in 2hours, with a pseudo first order kinetic constant of 0.077min-1. Radical quenching experiment and electron spin-resonance spectrometer (ESR) characterization results indicated that the excellent performance was attributed to synergy of radicals (SO4·-, ·OH, O2·-) and nonradical (1O2). Co-BC performed good removal efficiency (70%~100%) for acetone within a wide pH range (3~11). After being reused for 5times, Co-BC still exhibited a removal rate of 90% for acetone. The Co leaching amount from the Co-BC/PMS system was merely 0.61mg/L, well within the national wastewater discharge limit of 1mg/L and significantly lower than that (9.86mg/L) of the powder catalyst under identical conditions, demonstrating the superior catalytic performance and stability of Co-BC.
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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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