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Outline
Pyrolysis is an important process for efficient remediation of petroleum-contaminated soil (PCS), but how to reuse the obtained carbonized soil (RCS) has not received enough attention. In this study, RCS was treated by ball milling to activate its environmental catalytic components, and the obtained carbonized soil (RBCS) was used to activate peroxymonosulfate (PMS) oxidation to treat organic wastewater. The results showed that when the dosage of RBCS was 2g/L and the dosage of PMS was 1.5g/L, the removal rate of aniline (AN, 100mg/L) reached 99.9 %. Compared with RCS, ball milling treatment significantly improved the activation performance of RBCS for PMS oxidation. Quenching experiments and EPR tests showed that 、·OH、1O2 and environmental permanent free radicals (EPFRs) existed in the RBCS/PMS system. Electrochemical experiments show that there is also an electron transfer mechanism in the RBCS/PMS system. Ball milling exposes more metal oxides, amorphous carbon and oxygen-containing groups on the surface of carbonized soil. Metal oxides and oxygen-containing groups can activate PMS to produce reactive oxygen species to attack AN, while graphitized carbon and EPFRs may promote PMS oxidation by accelerating direct electron transfer to degrade AN. This study provides an environmentally friendly, value-added transformation strategy and treatment method for RCS, which is expected to have a good application prospect.
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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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