Mechanism of hydroxyl radical generation from biochar suspensions: Implications to diethyl phthalate degradation
Abstract
This paper investigated hydroxyl radical (OH) generation from biochar suspensions for diethyl phthalate (DEP) degradation in the presence of oxygen. Electron paramagnetic resonance (EPR) coupled with a salicylic acid trapping method were used to detect free radicals in biochar and verify OH generation from biochar suspensions. Free radicals (FRs) in biochar could induce OH generation, and ≈12 spins of FRs were consumed to produce one trapped [OH] molecule. The proposed mechanism of OH generation was that FRs in biochar transferred electrons to O2 to produce the superoxide radical anion and hydrogen peroxide, which reacted further with FRs to produce OH. Free radical-quenching studies utilizing superoxide dismutase, catalase, and deferoxamine as scavengers were used to testify this mechanism. Furthermore, OH generated from biochar suspensions could degrade DEP efficiently. These findings of this study provide new insights into the physicochemical properties and environmental implications of biochar.
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End-of-service-life disposal or regeneration of spent adsorbents and secondary contamination risk inevitably impedes biochar field application.
“End-of-service-life disposal/regeneration of spent adsorbents and secondary contamination risk inevitably impedes its field application.51”
From Sustainable remediation with an electroactive biochar system: mechanisms and perspectives (2020) · cites this paper as [51]
Adsorbed macromolecules cannot be completely degraded.
“Nevertheless, the adsorbed macromolecules cannot be completely degraded.”
From Sustainable remediation with an electroactive biochar system: mechanisms and perspectives (2020) · cites this paper as [51]
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- Authors
- Fang, G., Zhu, C., Dionysiou, D. D., Gao, J., & Zhou, D.
- Affiliations
- Chinese Academy of Sciences (CN)
- Anhui Agricultural University (CN)
- University of Cincinnati (US)
- Corresponding author
- Gao, Juan
- Venue
- Bioresource Technology
- Publisher
- Elsevier BV
- Published
- 2015-01
- Volume
- 176
- Pages
- 210-217
- ISSN
- 0960-8524 (ISSN-L)
- OpenAlex
- W2035069840
- Cited by
- 379
- References
- 34
- Citations by year
- 2026: 16 · 2025: 38 · 2024: 45 · 2023: 41 · 2022: 44 · 2021: 42 · 2020: 51 · 2019: 39 · 2018: 31 · 2017: 15 · 2016: 9 · 2015: 6
- FWCI
- 7.61
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Bioresource Technology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Key Basic Research Program of China (2014CB441105)
- National Natural Science Foundation of China (21377136, 41401252)
- Natural Science Foundation of Jiangsu Province of China (BK20141047)
- One Hundred Person Project of the Chinese Academy of Sciences
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Advanced oxidation water treatment
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
- Keywords
- hydroxyl radical generation, superoxide, hydrogen peroxide, oxygen activation, superoxide dismutase, catalase, deferoxamine, radical scavengers, biodegradation mechanisms
- MeSH terms
- Catalase, Charcoal, Electron Spin Resonance Spectroscopy, Free Radicals, Hydrogen Peroxide, Kinetics, Oxygen, Phthalic Acids, Superoxides, Superoxide Dismutase, Hydroxyl Radical
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