Combining Oxidative Torrefaction and Pyrolysis of Phragmites australis: Improvement of the Adsorption Capacity of Biochar for Tetracycline
The objective of this study was to evaluate the effect of oxidative torrefaction on the biochar characteristics of Phragmites australis (PAS) and its tetracycline (TC) adsorption capacity. Oxidative torrefaction combined with pyrolysis of PAS was performed, and the physicochemical properties of the...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2021-05-01
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| Series: | Frontiers in Energy Research |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenrg.2021.673758/full |
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| author | Shilin Jiang Mengjiao Tan Zhongliang Huang Jinguang Hu Changzhu Li Tingzhou Lei Xuan Zhang Zijian Wu Jing Huang Xiaoli Qin Hui Li |
| author_facet | Shilin Jiang Mengjiao Tan Zhongliang Huang Jinguang Hu Changzhu Li Tingzhou Lei Xuan Zhang Zijian Wu Jing Huang Xiaoli Qin Hui Li |
| author_sort | Shilin Jiang |
| collection | DOAJ |
| description | The objective of this study was to evaluate the effect of oxidative torrefaction on the biochar characteristics of Phragmites australis (PAS) and its tetracycline (TC) adsorption capacity. Oxidative torrefaction combined with pyrolysis of PAS was performed, and the physicochemical properties of the biochar were characterized. Subsequently, the effects of adsorbent dosage, initial TC concentration, salinity, and temperature on the TC adsorption capacity of PAS biochar were evaluated; the kinetic, equilibrium, and thermodynamic results were used to assess the adsorption mechanism. The results showed that the biochar derived from oxidatively torrefied PAS pyrolysis (TPBC) had higher specific surface area and lower ash content than the biochar derived from raw PAS pyrolysis (PBC). TPBC showed a higher TC adsorption capacity than PBC. The adsorption kinetics were more in agreement with pseudo-second-order model than pseudo-first-order and intraparticle diffusion models. The rate of adsorption by PAS biochar was controlled by external mass transfer and intraparticle diffusion, and the adsorption process was favorable and irreversible. Moreover, the dominant mode of adsorption is physical, and the organic functional groups of PAS biochar participate in the adsorption process. In summary, oxidative torrefaction could be an effective approach for improving the TC adsorption capacity of PAS biochar. |
| first_indexed | 2024-12-20T09:01:23Z |
| format | Article |
| id | doaj.art-42498e02370646728c99936aca11b4a9 |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-12-20T09:01:23Z |
| publishDate | 2021-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Energy Research |
| spelling | doaj.art-42498e02370646728c99936aca11b4a92022-12-21T19:45:51ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2021-05-01910.3389/fenrg.2021.673758673758Combining Oxidative Torrefaction and Pyrolysis of Phragmites australis: Improvement of the Adsorption Capacity of Biochar for TetracyclineShilin Jiang0Mengjiao Tan1Zhongliang Huang2Jinguang Hu3Changzhu Li4Tingzhou Lei5Xuan Zhang6Zijian Wu7Jing Huang8Xiaoli Qin9Hui Li10State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, ChangshaChinaState Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, ChangshaChinaState Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, ChangshaChinaDepartment of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, CanadaState Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, ChangshaChinaInstitute of Urban and Rural Mining, Changzhou University, Changzhou, ChinaState Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, ChangshaChinaState Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, ChangshaChinaState Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, ChangshaChinaState Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, ChangshaChinaState Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, ChangshaChinaThe objective of this study was to evaluate the effect of oxidative torrefaction on the biochar characteristics of Phragmites australis (PAS) and its tetracycline (TC) adsorption capacity. Oxidative torrefaction combined with pyrolysis of PAS was performed, and the physicochemical properties of the biochar were characterized. Subsequently, the effects of adsorbent dosage, initial TC concentration, salinity, and temperature on the TC adsorption capacity of PAS biochar were evaluated; the kinetic, equilibrium, and thermodynamic results were used to assess the adsorption mechanism. The results showed that the biochar derived from oxidatively torrefied PAS pyrolysis (TPBC) had higher specific surface area and lower ash content than the biochar derived from raw PAS pyrolysis (PBC). TPBC showed a higher TC adsorption capacity than PBC. The adsorption kinetics were more in agreement with pseudo-second-order model than pseudo-first-order and intraparticle diffusion models. The rate of adsorption by PAS biochar was controlled by external mass transfer and intraparticle diffusion, and the adsorption process was favorable and irreversible. Moreover, the dominant mode of adsorption is physical, and the organic functional groups of PAS biochar participate in the adsorption process. In summary, oxidative torrefaction could be an effective approach for improving the TC adsorption capacity of PAS biochar.https://www.frontiersin.org/articles/10.3389/fenrg.2021.673758/fullbiomassWetland plantoxidative torrefactionpyrolysisbiochartetracycline |
| spellingShingle | Shilin Jiang Mengjiao Tan Zhongliang Huang Jinguang Hu Changzhu Li Tingzhou Lei Xuan Zhang Zijian Wu Jing Huang Xiaoli Qin Hui Li Combining Oxidative Torrefaction and Pyrolysis of Phragmites australis: Improvement of the Adsorption Capacity of Biochar for Tetracycline Frontiers in Energy Research biomass Wetland plant oxidative torrefaction pyrolysis biochar tetracycline |
| title | Combining Oxidative Torrefaction and Pyrolysis of Phragmites australis: Improvement of the Adsorption Capacity of Biochar for Tetracycline |
| title_full | Combining Oxidative Torrefaction and Pyrolysis of Phragmites australis: Improvement of the Adsorption Capacity of Biochar for Tetracycline |
| title_fullStr | Combining Oxidative Torrefaction and Pyrolysis of Phragmites australis: Improvement of the Adsorption Capacity of Biochar for Tetracycline |
| title_full_unstemmed | Combining Oxidative Torrefaction and Pyrolysis of Phragmites australis: Improvement of the Adsorption Capacity of Biochar for Tetracycline |
| title_short | Combining Oxidative Torrefaction and Pyrolysis of Phragmites australis: Improvement of the Adsorption Capacity of Biochar for Tetracycline |
| title_sort | combining oxidative torrefaction and pyrolysis of phragmites australis improvement of the adsorption capacity of biochar for tetracycline |
| topic | biomass Wetland plant oxidative torrefaction pyrolysis biochar tetracycline |
| url | https://www.frontiersin.org/articles/10.3389/fenrg.2021.673758/full |
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