Citation: Huazhe Wang, Chenghuan Qiao, Chuchu Chen, Bing Liu, Juanshan Du, Qinglian Wu, Xiaochi Feng, Shuyan Zhan, Wan-Qian Guo. Synergistic adsorption and singlet oxygenation of humic acid on alkali-activated biochar via peroxymonosulfate activation[J]. Chinese Chemical Letters, ;2025, 36(5): 110244. doi: 10.1016/j.cclet.2024.110244 shu

Synergistic adsorption and singlet oxygenation of humic acid on alkali-activated biochar via peroxymonosulfate activation

a.
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
b.
Department of Energy Engineering, Korea Institute of Energy Technology (KENTECH), Naju 58330, South Korea
c.
State Key Laboratory of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
d.
Win Future Environmental Protection Tech. Co., Ltd., Tianjin 300308, China

guowanqian@hit.edu.cn

Received Date: 14 March 2024
Revised Date: 16 June 2024
Accepted Date: 11 July 2024
Available Online: 14 July 2024

Figures(5)

Humic acid (HA), as a represent of natural organic matter widely existing in water body, dose harm to water quality and human health; however, it was commonly treated as an environmental background substance while not targeted contaminant in advanced oxidation processes (AOPs). Herein, we investigated the removal of HA in the alkali-activated biochar (KBC)/peroxymonosulfate (PMS) system. The modification of the original biochar (BC) resulted in an increased adsorption capacity and catalytic activity due to the introduction of more micropores, mesopores, and oxygen-containing functional groups, particularly carbonyl groups. Mechanistic insights indicated that HA is primarily chemically adsorbed on the KBC surface, while singlet oxygen (¹O₂) produced by the PMS decomposition served as the major reactive species for the degradation of HA. An underlying synergistic adsorption and oxidation mechanism involving a local high concentration reaction region around the KBC interface was then proposed. This work not only provides a cost-effective solution for the elimination of HA but also advances our understanding of the nonradical oxidation at the biochar interface.
- Humic acid,
- Persulfate,
- Biochar,
- Adsorption,
- Nonradical oxidation
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