Preparation of nZVI embedded modified mesoporous carbon for catalytic persulfate to degradation of reactive black 5
| العنوان: | Preparation of nZVI embedded modified mesoporous carbon for catalytic persulfate to degradation of reactive black 5 |
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| المؤلفون: | Daishe Wu, Zhifei Ma, Tianxue Yang, Chen Chen, Haixin Zheng, Huali Cao, Fengchun Lv, Yu Yang |
| المصدر: | Frontiers of Environmental Science & Engineering. 15 |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Chemistry, Singlet oxygen, Kinetics, Mineralization (soil science), 010501 environmental sciences, Persulfate, 01 natural sciences, Catalysis, chemistry.chemical_compound, Hydrothermal synthesis, Degradation (geology), Pyrolysis, 0105 earth and related environmental sciences, General Environmental Science, Nuclear chemistry |
| الوصف: | High-efficiency and cost-effective catalysts with available strategies for persulfate (PS) activation are critical for the complete mineralization of organic contaminants in the environmental remediation and protection fields. A nanoscale zero-valent iron-embedded modified mesoporous carbon (MCNZVI) with a core-shell structure is synthesized using the hydrothermal synthesis method and high-temperature pyrolysis. The results showed that nZVI could be impregnated within mesoporous carbon frameworks with a comparatively high graphitization degree, rich nitrogen doping content, and a large surface area and pore volume. This material was used as a persulfate activator for the oxidation removal of Reactive Black 5 (RB5). The effects of the material dosage, PS concentration, pH, and some inorganic anions (i.e., Cl−, SO42−) on RB5 degradation were then investigated. The highest degradation efficiency (97.3%) of RB5 was achieved via PS (20 mmol/L) activation by the MCNZVI (0.5 g/L). The pseudo-first-order kinetics (k = 2.11 × 10−2 min−1) in the MCNZVI/PS (0.5 g/L, 20 mmol/L) was greater than 100 times than that in the MCNZVI and PS. The reactive oxygen species (ROS), including 1O2, SO4·−, HO., and ·O2−, were generated by PS activation with the MCNZVI. Singlet oxygen was demonstrated to be the primary ROS responsible for the RB5 degradation. The MCNZVI could be reused and regenerated for recycling. This work provides new insights into PS activation to remove organic contamination. |
| تدمد: | 2095-221X 2095-2201 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::a9b811f9647e55b462a23c8b3ec8dc53 https://doi.org/10.1007/s11783-020-1372-4 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........a9b811f9647e55b462a23c8b3ec8dc53 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 2095221X 20952201 |
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