Cu/CuO-Decorated Peanut-Shell-Derived Biochar for the Efficient Degradation of Tetracycline via Peroxymonosulfate Activation
Biochar (BC) usually has abundant surface functional groups, well-developed pore structures and high specific surface areas, which can combine with transition metals for peroxymonosulfate (PMS) activation to degrade organics. In this paper, BC modified with Cu/CuO was prepared by a modified impregna...
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MDPI AG
2023-08-01
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| Online Access: | https://www.mdpi.com/2073-4344/13/9/1246 |
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| author | Jianhui Zhao Huan Li Yuanzhou Wang Jingjie Yu Ning Li Shaopo Wang |
| author_facet | Jianhui Zhao Huan Li Yuanzhou Wang Jingjie Yu Ning Li Shaopo Wang |
| author_sort | Jianhui Zhao |
| collection | DOAJ |
| description | Biochar (BC) usually has abundant surface functional groups, well-developed pore structures and high specific surface areas, which can combine with transition metals for peroxymonosulfate (PMS) activation to degrade organics. In this paper, BC modified with Cu/CuO was prepared by a modified impregnation pyrolysis method using peanut shells as raw materials. The morphology, structure and physicochemical properties were analyzed. Results showed that the originally smooth BC surface was modified into a rough structure with distributed metal particles, and the specific surface area of the modified Cu/CuO-BC700 (i.e., Cu/CuO-BC) increased from the initial 22.57 to 192.64 m<sup>2</sup>/g. The Cu/CuO-BC was employed for PMS activation and tetracycline (TC) degradation, achieving a removal efficiency of 93.2% at TC initial concentration 20 mg/L, PMS concentration 0.5 mM and catalyst dosage 0.1 g/L after 30 min. The influence of co-existing anions in the actual water on TC degradation followed the order of HCO<sub>3</sub><sup>−</sup> > H<sub>2</sub>PO<sub>4</sub><sup>−</sup> > Cl<sup>−</sup>, and HA had an inhibitory effect on TC degradation. A variety of active species participated in TC degradation, and the free radical pathway played a dominant role. Furthermore, the Cu/CuO-BC could maintain the degradation efficiency of TC up to 80% even after five consecutive cycles. The Cu/CuO-BC maintained high activity through redox reactions between catalytically generated active species and the cycling of metal ions (Cu<sup>+</sup>/Cu<sup>2+</sup>). |
| first_indexed | 2024-03-10T22:56:00Z |
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| language | English |
| last_indexed | 2024-03-10T22:56:00Z |
| publishDate | 2023-08-01 |
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| series | Catalysts |
| spelling | doaj.art-1db7942df488469786ea3bf7637e28b22023-11-19T09:57:45ZengMDPI AGCatalysts2073-43442023-08-01139124610.3390/catal13091246Cu/CuO-Decorated Peanut-Shell-Derived Biochar for the Efficient Degradation of Tetracycline via Peroxymonosulfate ActivationJianhui Zhao0Huan Li1Yuanzhou Wang2Jingjie Yu3Ning Li4Shaopo Wang5School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, ChinaSchool of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, ChinaSchool of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, ChinaSchool of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, ChinaSchool of Environmental Science and Engineering, Tianjin University, Tianjin 300072, ChinaSchool of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, ChinaBiochar (BC) usually has abundant surface functional groups, well-developed pore structures and high specific surface areas, which can combine with transition metals for peroxymonosulfate (PMS) activation to degrade organics. In this paper, BC modified with Cu/CuO was prepared by a modified impregnation pyrolysis method using peanut shells as raw materials. The morphology, structure and physicochemical properties were analyzed. Results showed that the originally smooth BC surface was modified into a rough structure with distributed metal particles, and the specific surface area of the modified Cu/CuO-BC700 (i.e., Cu/CuO-BC) increased from the initial 22.57 to 192.64 m<sup>2</sup>/g. The Cu/CuO-BC was employed for PMS activation and tetracycline (TC) degradation, achieving a removal efficiency of 93.2% at TC initial concentration 20 mg/L, PMS concentration 0.5 mM and catalyst dosage 0.1 g/L after 30 min. The influence of co-existing anions in the actual water on TC degradation followed the order of HCO<sub>3</sub><sup>−</sup> > H<sub>2</sub>PO<sub>4</sub><sup>−</sup> > Cl<sup>−</sup>, and HA had an inhibitory effect on TC degradation. A variety of active species participated in TC degradation, and the free radical pathway played a dominant role. Furthermore, the Cu/CuO-BC could maintain the degradation efficiency of TC up to 80% even after five consecutive cycles. The Cu/CuO-BC maintained high activity through redox reactions between catalytically generated active species and the cycling of metal ions (Cu<sup>+</sup>/Cu<sup>2+</sup>).https://www.mdpi.com/2073-4344/13/9/1246Cu/CuOmodified biocharperoxymonosulfateactive speciestetracycline |
| spellingShingle | Jianhui Zhao Huan Li Yuanzhou Wang Jingjie Yu Ning Li Shaopo Wang Cu/CuO-Decorated Peanut-Shell-Derived Biochar for the Efficient Degradation of Tetracycline via Peroxymonosulfate Activation Catalysts Cu/CuO modified biochar peroxymonosulfate active species tetracycline |
| title | Cu/CuO-Decorated Peanut-Shell-Derived Biochar for the Efficient Degradation of Tetracycline via Peroxymonosulfate Activation |
| title_full | Cu/CuO-Decorated Peanut-Shell-Derived Biochar for the Efficient Degradation of Tetracycline via Peroxymonosulfate Activation |
| title_fullStr | Cu/CuO-Decorated Peanut-Shell-Derived Biochar for the Efficient Degradation of Tetracycline via Peroxymonosulfate Activation |
| title_full_unstemmed | Cu/CuO-Decorated Peanut-Shell-Derived Biochar for the Efficient Degradation of Tetracycline via Peroxymonosulfate Activation |
| title_short | Cu/CuO-Decorated Peanut-Shell-Derived Biochar for the Efficient Degradation of Tetracycline via Peroxymonosulfate Activation |
| title_sort | cu cuo decorated peanut shell derived biochar for the efficient degradation of tetracycline via peroxymonosulfate activation |
| topic | Cu/CuO modified biochar peroxymonosulfate active species tetracycline |
| url | https://www.mdpi.com/2073-4344/13/9/1246 |
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