Key Role of Persistent Free Radicals in Hydrogen Peroxide Activation by Biochar: Implications to Organic Contaminant Degradation
Institute of Soil Science · Chinese Academy of Sciences · +1 more institution
Abstract
We investigated the activation of hydrogen peroxide (H2O2) by biochars (produced from pine needles, wheat, and maize straw) for 2-chlorobiphenyl (2-CB) degradation in the present study. It was found that H2O2 can be effectively activated by biochar, which produces hydroxyl radical ((•)OH) to degrade 2-CB. Furthermore, the activation mechanism was elucidated by electron paramagnetic resonance (EPR) and salicylic acid (SA) trapping techniques. The results showed that biochar contains persistent free radicals (PFRs), typically ∼ 10(18) unpaired spins/gram. Higher trapped [(•)OH] concentrations were observed with larger decreases in PFRs concentration, when H2O2 was added to biochar, indicating that PFRs were the…
Citation impact
- FWCI
- 20.39
- Percentile
- 100%
- References
- 67
Authors
6- GFGuodong FangCorresponding
Institute of Soil Science, Chinese Academy of Sciences
- JGJuan Gao
Institute of Soil Science, Chinese Academy of Sciences
- CLCun Liu
Institute of Soil Science, Chinese Academy of Sciences
- DDDionysios D. Dionysiou
University of Cincinnati
- YWYu Wang
Institute of Soil Science, Chinese Academy of Sciences
Topics & keywords
- Biochar
- Chemistry
- Radical
- Hydrogen peroxide
- Electron paramagnetic resonance
- Photochemistry
- Hydroxyl radical
- Toluene
- Clean water and sanitation