Slow pyrolysis magnetization of hydrochar for effective and highly stable removal of tetracycline from aqueous solution
Abstract
Although biochar has been intensively studied as an inexpensive adsorbent for diverse organic pollutants in aqueous solution, synchronously achieving high adsorption capacity, separability, and stability is still a challenge. Herein, we partially addressed this issue via an integrated activation and pyrolytic magnetization of sawdust hydrochar, during which the surface area of magnetic activated sawdust hydrochar (M-SDHA) increases from 1.7 to 1710 m 2 g –1, and the weight loss decreases from 70 to 5% at 700 °C. Correspondingly, the maxmium adsorption capacity of M-SDHA toward tetracycline (TC) reaches 423.7 mg g –1 and remains constant at pH 5–9. Multiple characterizations show that the fine pore structure and surface functional groups of M-SDHA were maintained during the pyrolysis magnetization process, which is responsible for the high adsorption capacity. In the pyrolysis magnetization process, the FeCl 3 was reduced to Fe 3 O 4 which endowed M-SDHA with magnetism and may simultaneously improve the thermostability of M-SDHA. In addition, acidic–basic stability of M-SDHA may be responsible for the stable adsorption toward TC at different pHs based on Fourier transform infrared spectroscopic results. These results along with the column adsorption experiment show that M-SDHA is an effective and practical adsorbent for TC removal.
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Batch/column/mesocosm experiments have frequently shown that biochar amendment can enhance the OMP removal capacity of biofilters.
“Batch/column/mesocosm experiments have frequently shown that biochar amendment can enhance the OMP removal capacity of biofilters (Ashoori et al., 2019; Buates et al., 2024; Chen et al., 2017; Pritchard et al., 2023; Roh et al., 2015; Spahr et al., 2022; Ulrich et al., 2017b, 2017a, 2015; Yan et al., 2017; Zhang et al., 2015).”
From Critical field evaluations of biochar-amended stormwater biofilters for PFAS and other organic micropollutant removals (2025) · cites this paper as Chen et al., 2017
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Ahmad, M., Lee, S. S., Dou, X., Mohan, D., Sung, J.-K., Yang, J. E., & Ok, Y. S. (2012) · Bioresource Technology · doi:10.1016/j.biortech.2012.05.042 · Cited by 1,357 · see citing works
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Plenty of room for carbon on the ground: Potential applications of biochar for stormwater treatment
Mohanty, S. K., Valenca, R., Berger, A. W., Yu, I. K. M., Xiong, X., Saunders, T. M., & Tsang, D. C. W. (2018) · Science of The Total Environment · doi:10.1016/j.scitotenv.2018.01.037 · Cited by 249 · see citing works
Hydrochars production, characterization and application for wastewater treatment: A review
Azzaz, A. A., Khiari, B., Jellali, S., Ghimbeu, C. M., & Jeguirim, M. (2020) · Renewable and Sustainable Energy Reviews · doi:10.1016/j.rser.2020.109882 · Cited by 236 · see citing works
Beryani, A., Flanagan, K., You, S., Forsberg, F., Viklander, M., & Blecken, G.-T. (2025) · Water Research · doi:10.1016/j.watres.2025.123547 · Cited by 25 · see citing works
- Authors
- Chen, S.-Q., Chen, Y.-L., & Jiang, H.
- Affiliations
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
- University of Science and Technology of China (CN)
- Corresponding author
- Jiang, Hong
- ORCID
- Jiang, Hong
- Venue
- Industrial & Engineering Chemistry Research
- Publisher
- American Chemical Society (ACS)
- Published
- 2017-03-09
- Volume
- 56
- Issue
- 11
- Pages
- 3059-3066
- ISSN
- 0888-5885 (ISSN-L)
- 1520-5045
- OpenAlex
- W2593380907
- Cited by
- 51
- References
- 2
- Citations by year
- 2026: 2 · 2025: 5 · 2024: 6 · 2023: 6 · 2022: 7 · 2021: 4 · 2020: 8 · 2019: 5 · 2018: 7 · 2017: 1
- FWCI
- 3.07
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Industrial & Engineering Chemistry Research (publishedVersion)
- Funders
- Ministry of Education of the People's Republic of China
- Ministry of Science and Technology of the People's Republic of China (2012ZX07103-001)
- National Natural Science Foundation of China (21677138)
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
- Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
- Keywords
- tetracycline removal, hydrochar, slow pyrolysis, magnetic adsorbent, sawdust, biochar activation, magnetite, adsorption capacity, pH stability, column adsorption, antibiotic removal from water
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