Citation: Mingze Sun, Jianhua Qu, Kaige Li, Yue Lei, Jingyi Wang, Juncheng Wang, Yue Tao, Yifan Wang, Ying Zhang. Hydroxylamine-regulated reactive oxygen species generation in an iron-biochar composite activated peracetic acid system for ultra-rapid degradation of atrazine[J]. Chinese Chemical Letters, ;2026, 37(12): 112750. doi: 10.1016/j.cclet.2026.112750 shu

Hydroxylamine-regulated reactive oxygen species generation in an iron-biochar composite activated peracetic acid system for ultra-rapid degradation of atrazine

Mingze Sun ^{a, c} ,
Jianhua Qu ^{b, *,} ,
Kaige Li ^d ,
Yue Lei ^b ,
Jingyi Wang ^b ,
Juncheng Wang ^b ,
Yue Tao ^b ,
Yifan Wang ^b ,
Ying Zhang ^{a, b, *,}

a.
State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
b.
School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
c.
University of Chinese Academy of Sciences, Beijing 100049, China
d.
Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province (Hainan University), Haikou 570228, China

jhqu@neau.edu.cn

zhangying_neau@163.com

Received Date: 12 October 2025
Revised Date: 2 April 2026
Accepted Date: 7 April 2026
Available Online: 8 April 2026

Figures(6)

Iron-based catalysts-activated peracetic acid (PAA) for water treatment has been seriously limited by the difficulties in Fe(Ⅱ) regeneration and catalyst recovery. Herein, we employed the hydroxylamine (HA) to regulate a facilely prepared iron-carbon composite to activate PAA for organics degradation. Compared with the FONC@BC/PAA system, the incorporation of HA could accomplish about 100% removal of atrazine (ATZ) within only 4 min, which exhibited a high reaction rate constant of 0.524 min⁻¹, representing a remarkable 4.63-fold increase. Notably, in contrast to prior research focusing on the function of HA supplementation in iron cycling, HA in this study played a triple role by activating PAA to generate HO•, accelerating the conversion of Fe(Ⅲ) and FeⅣO2+ to Fe(Ⅱ), and generating additional, more reactive oxygen species (ROS) that were susceptible to ATZ degradation such as R−O• and HO•. Moreover, the system possessed remarkable efficacy in removing ATZ within an extensive pH suitability range from 3 to 11 and high anti-interference capacity to coexisting substances, and maintained complete ATZ removal even after five recycles with effective magnetic recovery of FONC@BC. This study shed light on the overlooked enhancement of ROS production during HA regulation, putting forward a promising solution to optimize PAA - based advanced oxidation processes for water treatment.
- Hydroxylamine,
- Iron-biochar composite,
- Peracetic acid,
- Iron cycle,
- Reactive oxygen species regulation
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